Answer:
The maximum height with respect to the ground is 1.5m + 4m/s2 x (4m/s/2) = 6m.
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Define 1meter, 1second and 1kilogram
Answer:
Explanation:
1meter equals 100cm mt and cm are measure the distance.
1second, 60seconds equals 1minute second minute and hour meansures time.
1kg is equals 1000g and measures weight.
Cheetahs can accelerate to a speed of 20.0 m/s s and can continue to accelerate to reach a top speed of 29.8 m/s. Assume the acceleration is constant until the top speed is reached and is zero thereafter. Let the +x-direction point in the direction the cheetah runs.
Express the cheetah's top speed in miles per hour
The final speed of the Cheetah is 66.6607 miles per hour.
What is acceleration?Acceleration is rate of change of velocity with time. Due to having both direction and magnitude, it is a vector quantity. Si unit of acceleration is meter/second² (m/s²).
If a body changes its velocity or direction of velocity, the physical quantity "acceleration" comes into play.
Initial speed of the Cheetah is = 20.0 m/s
Final speed of the Cheetah is = 29.8 m/s
Now 1 meter per second = 2.237 miles per hour
Hence, Final speed of the Cheetah is = 29.8 × 2.237 miles per hour
= 66.6607 miles per hour.
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A person stands on a scale in a elevator at rest. The scale reads 900N. 1) what is the persons mass 2) the elevator accelerates up at 2.5m/s^2. What does the scale read now ? 3)The elevator then continues to move upwards with a steady speed of 4m/s for 5 seconds. What does the scale read during this period 4)the elevator now decelerates at 1.8m/s^2 until it reaches zero velocity. What does the scale read during this period[/B]
1. Mass of the person is 91.84 kg
2. The scale reads 917.4 N
3. The scale reads 917.4 N
4. The scale reads 905 N
Since the gravity acceleration (g) is not stated, assume it is 9.8 m/s^2
1. To calculate their mass, the formula m = F/g (where m is mass, F is weight (or force), and g is the acceleration due to gravity) would need to be used with the known weight and acceleration due to gravity (9.8 m/s^2). So, m = 900 N / 9.8 m/s^2 = 91.84 kg.
2. When the elevator accelerates upward at 2.5 m/s^2, the scale reading will increase. This is because the apparent weight of the person will be greater than their actual weight due to the upward acceleration of the elevator. The formula for apparent weight is Fapparent = m * g + ma (where m is mass, g is the acceleration due to gravity, and a is the acceleration of the elevator). So, Fapparent = 91.84 kg * 9.8 m/s^2 + 91.84 kg * 2.5 m/s^2 = 917.42 N.
3. During the steady speed of 4m/s, the scale will still read 917.42 N because the apparent weight does not change with constant velocity.
4. When the elevator decelerates at 1.8 m/s^2, the scale reading will decrease. The apparent weight will be less than the person's actual weight due to the downward acceleration of the elevator. The formula for apparent weight will be the same as in step 2, using the negative value of the deceleration of the elevator. So, Fapparent = 91.84 kg * 9.8 m/s^2 - 91.84 kg * 1.8 m/s^2 = 905.00 N.
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the force shown on a force time diagram acts on a 3.7 kg object. find the impulse of the force
The impulse on the mass is equal to the area under the force -time graph. The area under the plot in the graph is 6 N.s thus the impulse is 6 Ns.
What is impulse ?Impulse of a moving object is its change in momentum. It is equal to the product of force and time. The force- time plot of a moving object can be used to determine the impulse.
From the given force- time graph, the area under the curve is :
area = area of the two triangles + area of the rectangle.
area of the triangle = 1/2 (2 N × 2s )= 2N s
area of the rectangle = 2 N × 1s = 2N s.
The second triangle have the area equal to the first one that is 2 N s.
then the total area of the curve = 2 Ns × 3 = 6 Ns.
Therefore, the impulse on the mass is 6 Ns.
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Which of the following is a longitudinal wave? which of the following is a longitudinal wave?A.sound waveB.water waveC.light wave
Of the choices shown, sound wave is classified as a longitudinal wave (A)
A longitudinal wave is a type of wave that travels in a direction that is perpendicular to the motion of the particles that make up the medium in which the wave is traveling. Similar to light waves, sound waves oscillate in a direction parallel to the direction in which they propagate, producing compressions and rarefactions. Because of this, we refer to sound waves as longitudinal waves.
The particles that make up the wave do not move in the same direction as the wave; rather, they merely move back and forth in relation to their own equilibrium. Additional examples of longitudinal waves are the sound wave, the principal waves that are produced by an earthquake, ultrasound, the vibration of a spring, the fluctuation in gas, and the waves that are produced by a tsunami.
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A ball is thrown upwards. Its acceleration is: A. upward during both ascent and descent B. upward during ascent and downward during descent C. downward during both ascent and descent D. downward during ascent and upward during descent E. downward at all times except at the very top, when it is zero
A ball is thrown upwards. Its acceleration is: C. downward during both ascent and descent
What is vertical launch upwards?In physics vertical launch upwards is the motion described by an object that has been launched vertically upwards in which the height and the effect of the earth's gravitational force on the launched object are taken into account.
In the vertical launch upwards movements, the acceleration due to the gravity is always acting downward, this is because of attraction that the earth exerts on all bodies pulling them toward its center
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A 4kg ball moving 8m/s to the right collides with a 2kg ball at rest. After the
collision, the 4kg ball moves with a new velocity of 4.8m/s to the right. Assuming
that the collision is elastic, how fast is the 2kg ball moving?
We can see that the new velocity of the 2 Kg ball is 6.4 m/s.
What is the momentum?Momentum is a measure of an object's motion. It is defined as the product of an object's mass and velocity. In physics, momentum is a vector quantity, meaning it has both magnitude and direction.
The law of conservation of momentum states that in an isolated system, the total momentum of the system remains constant if no external forces are acting upon it.
Given that we know that;
Momentum before collision = Momentum after collision
(4 * 8) + (2 * 0) = (4 * 4.8) + (2 * v)
Let v be the new velocity
32 = 19.2 + 2v
v = 32 - 19.2/2
v = 6.4 m/s
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22 4 points
What is the mechanical advantage of a hydraulic system that has a small piston diameter of 6.5 inches and a large piston diameter of 20 inches?
A.8.84
B.15.35
C.9.47
D.3.7
This is 20 plus 6.5 squared, which equals.Nearly nine 478 is what this equates to.This system therefore has a 9.47 mechanical advantage.
What mechanical benefit does this hydraulic system offer? This is 20 plus 6.5 squared, which equals.Nearly nine 478 is what this equates to.This system therefore has a 9.47 mechanical advantage.In a hydraulic system, the fluid's capacity to convey pressure evenly accounts for the significant mechanical advantage.It enables you to apply a tiny amount of force to the small piston in order to generate a bigger amount of force on the large piston.The output force minus the input force is equal to the mechanical advantage.The ratio of the large piston area to the tiny piston area is the mechanical advantage of a hydraulic lift that is optimal.
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Determine the direction of the force on each charge. Enter your answers numerically separated by commas_ AZd 01, 02 , 03, 04 ________ counterclockwise from the +x axis
The direction of the force on a charge due to an electric field depends on the sign of the charge and the direction of the electric field. The direction of the electric field is determined by the direction of the gradient of the electric potential.
In general, the direction of the electric field can be found using Coulomb's law, which states that the force between two point charges is proportional to the product of the charges and inversely proportional to the square of the distance between them. The direction of the force is given by the direction of the vector connecting the two charges.
Given the information provided in the prompt, it is not possible to determine the direction of the force on each charge without additional information. Please provide more details.
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the variation of pressure with density in a thick gas layer is given by P=CP^n, where C and n are constants. noting that the pressure change across a differential fluid layer of thickness dz in the vertical z-direction is given as dp , obtain a relation for pressure as a function of elevation z. take the pressure and density at z. Take the pressure and density at z=0 to be P0 and p0 respectively.
The relation for pressure as a function of elevation z can be obtained by integrating the given equation: P=CP^n.
The hydrostatic equationdp = (nC/p^(n-1))dz
P(z) = P0 + (nC/p0^(n-1)) z
We can rewrite this equation as dP/P^n=C*dz.Integrating this equation with respect to z, we obtain P=P0*(1+C*z)^(1/n), where P0 and p0 are the pressure and density at z=0, respectively.This relation is called the hydrostatic equation. The hydrostatic equation describes the variation of pressure with elevation by considering the pressure change across a differential fluid layer of thickness dz in the vertical z-direction.Thus, it links the pressure at any point to the pressure at the base of the fluid layer, which is given by P0.Furthermore, the equation takes into account the variation of pressure with density, which is given by P=CP^n.The relation for pressure as a function of elevation z is given as:P(z) = P0 * (p0/P0)^(z/M)where M = (1/n) * (C/g)^(1/n-1) and g is the gravitational acceleration.This relation is called the barometric formula. It states that the pressure of a gas layer decreases exponentially as the elevation increases, with a rate of decrease determined by the constants C and n. This relation is useful for calculating the pressure at different elevations in a gas layer, such as in the atmosphere.To learn more about the hydrostatic equation refer to:
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Use Gauss's theorem to prove that at the surface of a curved charged conductor, the normal derivative of the electric field is given by 譜--(1+1) 1 dE R1 R2 where Ri and R2 are the principal radii of curvature of the surface.
The normal derivative of the electric field is given by [tex]\frac{1}{E}\times\frac{dE}{dn}=-(\frac{1}{R_{1}}+\frac{1}{R_{2}} )[/tex].
The Gauss law is really applied in integral form, E da = 0.
then there is no contained charge. prior to thinking about the three-dimensional issue. Think about the similar circumstance in two dimensions.
Gauss laws therefore state that if you place a curve Gaussian box adjacent to the charged conductor's surface at a position where the radius of curvature is R.
[tex]0=\int {E.x} \, da=E_{top}\triangle a_{top} -E_{bottom}\triangle a_{bottom}[/tex]
[tex]\triangle a_{top}[/tex] and [tex]\triangle a_{bottom}[/tex] are the top and bottom portions of the box, respectively.
using [tex]\triangle a_{top}[/tex] =(R+E)d∅× dz and,
[tex]\triangle a_{bottom}[/tex]=Rd∅× dz gives
[tex]E_{bottom}=E_{top}(1+\frac{E}{R})[/tex]
This enables us to compute.
[tex]\frac{dE}{dn}= \lim_{E \to 0} \frac{E_{top}-E_{bottom}}{E} =\lim_{E \to 0}(\frac{-E_{top}}{R})= \frac{-E_{top}}{R}[/tex]
Taking into consideration that Flop is the same as E ,this may be written as
[tex]\frac{1}{E}\times\frac{dE}{dn}=-\frac{1}{R}[/tex]
This is a two-dimensional expression analogue.
Returning to the 3D issue, we will use the aforementioned methods. However, this time around, the top and bottom
[tex]\triangle a_{top}[/tex]=[tex](R_{1}+E)\times(R_{2}+E)\times[/tex]dФ
[tex]\triangle a_{bottom}[/tex]=[tex]R_{1}R_{2}[/tex]dФ
Now putting these in equation
[tex]E_{bottom}=E_{top}(1+\frac{E}{R_{1} })(1+\frac{E}{R_{2} })[/tex]
which gives,
[tex]\frac{dE}{dn}= \lim_{E \to 0} \frac{E_{top}-E_{bottom}}{E} =\lim_{E \to 0}(-E_{top}(\frac{1}{R_{1} }+\frac{1}{R_{2} }+\frac{E}{R_{1} R_{2} })=-E_{top}(\frac{1}{R_{1} }+\frac{1}{R_{2} })[/tex]
Rearranging the equation gives,
[tex]\frac{1}{E}\times\frac{dE}{dn}=-(\frac{1}{R_{1}}+\frac{1}{R_{2}} )[/tex]
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550 Hz sound is emitted from a megaphone into symmetrical tubes of one top path and one bottom path. The top and bottom paths are initially identical, but the top path can be lengthened. a. Why is the interference initially constructive? b. How far do you have to raise the top part of the tube to achieve destructive interference in m?
Initially the sound waves are in phase and they overlap to form the constructive interference pattern. The length that we have to raise the top part will be equal to the wavelength of the waves in meter.
What is interference ?A wave of greater, lower, or the same amplitude is created when two waves merge through interference by combining their displacements at all points in space and time.
The interaction of waves that are coherent or correlated with one another, either because they originate from the same source or because their frequencies are similar or almost identical, leads to both constructive and destructive interference.
All sorts of waves, including light, radio, acoustic, surface water waves, gravity waves, and matter waves, can exhibit interference effects. In constructive interference, the waves are in single phase forms a resultant wave with higher amplitude.
When waves from in phase phase meets, the resultant wave will have an amplitude less than the individual amplitudes. Here
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based on the above equation, how many moles of o2 are needed to produce 18 moles of water and 30 moles of carbon dioxide?
30 moles of oxygen are needed to produce 18 moles of water and 30 moles of carbon dioxide.
The balanced chemical equation for the reaction between water and carbon dioxide to form glucose and oxygen can be written as:
C₆H₁₂O₆ + 6O₂ -> 6CO₂ + 6H₂O
From the equation, it is clear that for every mole of glucose, 6 moles of oxygen are needed. We can use this information to determine the number of moles of oxygen required to produce 18 moles of water and 30 moles of carbon dioxide.
First, we need to find the number of moles of glucose produced, which can be calculated by dividing the number of moles of carbon dioxide produced by 6:
30 moles CO₂ / 6 = 5 moles glucose
Since 6 moles of oxygen are needed for every mole of glucose, we can now calculate the number of moles of oxygen required:
5 moles glucose x 6 moles O₂/mole glucose = 30 moles O₂
So, 30 moles of oxygen are needed to produce 18 moles of water and 30 moles of carbon dioxide.
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The spectrum of a continuous cool source located behind a hot cloud of gas will show group of answer choices O emission lines O absorption lines O emission and absorption lines O no spectral lines
The spectrum of a continuous cool source located behind a hot cloud of gas will show a combination of emission lines and absorption lines.
The emission lines will be from the continuous cool source, while the absorption lines will be from the hot cloud of gas. Absorption lines are dark lines in the spectrum caused by the hot gas absorbing light from the cool source. Emission lines are bright lines in the spectrum caused by the hot gas emitting light.
Emission lines are bright lines in the spectrum caused by the hot gas emitting light. They are produced when electrons in an atom or molecule make a transition from a higher energy state to a lower energy state, releasing energy as a photon of light that has a specific wavelength.
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A truck weighs twice as much as a car, and is moving at twice the speed of the car
The kinetic energy of an object increases as the mass and speed increases. Here, the truck weighs twice that of car and has a twice speed then it has a kinetic energy 8 times greater than the car.
What is kinetic energy ?Kinetic energy is form of energy generated by virtue of the motion of the object. It is related to the mass and velocity of the object by the expression below:
Ke = 1/2 mv²
Let the mass and velocity of the car be m and v. Then its kinetic energy is 1/2 mv²
The mass and velocity of the truck are being 2m and 2v.
Then, kinetic energy of the truck = 1/2 2m (2v)²
Ke = 1/2 8 m v²
Therefore, the truck has 8 times the kinetic energy of the car. Hence, option d is correct.
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Your question is incomplete. But your complete question probably was:
A truck weighs twice as much as a car, and is moving at twice the speed of the car. Which statement is true about the truck's kinetic energy compared to that of the car?
a. All that can be said is that the truck has more kinetic energy.
b. The truck has twice the kinetic energy of the car.
c. The truck has 4 times the kinetic energy of the car.
d. The truck has 8 times the kinetic energy of the car.
. explain why the smell of smoke when you are sitting at a campfire does not trigger alarm, but the smell of smoke in your residence hall does.
Our sense of smell can adapt or become habituated to familiar and continuous stimuli, like the scent of smoke at a campfire.
The different reactions to the smell of smoke in these two situations are due to context and prior associations. When sitting at a campfire, the scent of smoke is typically associated with a positive and relaxing experience, while in a residence hall, the scent of smoke is more likely to be associated with a potential fire or danger.
The brain processes these different associations and can trigger a different response, such as an alarm or heightened state of alertness in response to smoke in a residence hall.
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Three horizontal ropes pull on a large engine block, producing the vector forces A, B and
C as shown below. Find the magnitude and direction of a fourth force on the engine that
will make the vector sum of the forces equal zero.
Use the method of components to calculate the magnitude and represent the direction
in degrees from the positive x or from the negative x axis. Marks will be taken off if
you use other methods.
Σ Φ
= 0
Fand = P
P
sin a b
Cosa
B (80.0 N)
30.0°
X
30.0°
53.0⁰
(40.0 N)
A (100.0 N)
·x
The magnitude and direction of a fourth force on the engine that will make the vector sum of the forces equal zero is 193.1 N with direction is 57.7° counter-clockwise from the positive x axis.
What is magnitude?The magnitude or size of a mathematical object is a property which determines whether the object is larger or smaller than other objects of the same kind.
We find the x and y components of each force:
A = 100 N, θ = 53.0° => Ax = 100 N * cos (53.0°) = 70.7 N; Ay = 100 N * sin (53.0°) = 50.0 N
B = 40.0 N, θ = 30.0° => Bx = 40.0 N * cos (30.0°) = 34.0 N; By = 40.0 N * sin (30.0°) = 20.0 N
C = 80.0 N, θ = 30.0° => Cx = 80.0 N * cos (30.0°) = 68.0 N; Cy = 80.0 N * sin (30.0°) = 40.0 N
We will find the total x and y components:
Net x = Ax + Bx + Cx = 70.7 N + 34.0 N + 68.0 N = 172.7 N
Net y = Ay + By + Cy = 50.0 N + 20.0 N + 40.0 N = 110.0 N
Finally, let's find the magnitude and direction of the fourth force, P:
P = sqrt (Net x^2 + Net y^2) = sqrt (172.7 N^2 + 110.0 N^2) = 193.1 N
θ = tan^-1 (Net y / Net x) = tan^-1 (110.0 N / 172.7 N) = 57.7°
In conclusion, if the angle is negative, the direction is clockwise from the negative x axis. In this example, the angle is positive, so the direction is 57.7° counter-clockwise from the positive x axis.
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PLEAS HELPPP ITS FOR A FORENSIC SCIENCE CLASS
USE COMPLETE SENTENCES PLEAS
The picture is the crime scene that you will use for the questions there are 1-9 questions and you have to draw out the picture in a peace of paper and DRAW the lines of convergence and area of convergence for question 2 you will also for question 2 For question 2 Do it in order for the question where the person got shot put it by which death is quicker
Directions: In this exam you will be asked to analyze a crime scene and describe what the blood spatter can tell us.
USE COMPLETE SENTENCES AND PROPER SPELLINGS. (You have autocorrect, please use it) blood
The scene:
You enter the scene and find 2 bodies. One has been shot in the head. The other has been shot in the chest and has blood coming from their mouth and nose.
Questions
1) Which man was shot in the head, and which was shot in the chest. Use evidence from the scene to back up your claim. (1pt)
2) Find the area of convergence for both gunshot sites. (2pts)
3) How would you find the angle that the blood impacted the ground? (1pt)
4) How would you explain the bright red smaller spatter? (1pt)
5) How would you explain the small circular drops in-between position 2 and man #2? What does this tell us? (1pt)
6) Why are there large pools of blood below both men’s bodies? (1pt)
7) How do you explain the 1 large droplet going in the opposite direction of the other 4 large droplets in position 2? (1pt)
8) What are the smaller secondary droplets around primary droplets called? (1pt)
9) Who shot first? (1pt)
1) The man who was shot in the head was shot at a closer range than the man who was shot in the chest, as evidenced by the large pool of blood around his body. The man shot in the chest was shot at a slightly further range, as evidenced by the smaller pools of blood around him.
2) The area of convergence for both gunshot sites can be found by drawing a line from the center of each pool of blood and extending it into the room. The point where the two lines meet is the area of convergence.
3) The angle that the blood impacted the ground can be determined by measuring the angle between the direction of the droplets and the ground.
4) The bright red smaller spatter is caused by the presence of high velocity blood droplets, which are propelled at a high velocity when the bullet impacts the body.
5) The small circular drops in-between position 2 and man #2 are likely caused by a back spatter, which is a phenomenon where blood is propelled in the opposite direction of the force that caused it. This could mean that the man in position 2 was shot first.
6) There are large pools of blood below both men’s bodies because they were both shot at a close range, which caused a large amount of blood to be expelled from their bodies.
7) The large droplet going in the opposite direction of the other 4 large droplets in position 2 is likely caused by a back spatter, which is a phenomenon where blood is propelled in the opposite direction of the force that caused it. This could mean that the man in position 2 was shot first.
8) The smaller secondary droplets around primary droplets are called satellite droplets.
9) It is not possible to tell who shot first based on the evidence provided.
use the climber's tea problem to calculate the mass of butane (in g) needed to fuel the stove to heat the water for tea.
the mass of butane (in g)needed to fuel the stove to heat the water for tea. is 1.32g
Butane is a colorless gas with a little aroma of petroleum. It might smell so it can be transported. It is transported under its vapor pressure as a liquefied gas. Ingestion of the liquid can result in frostbite. It is quickly set ablaze. Its fumes weigh more than the air. Any leak could be a liquid or a vapor one. The canisters may violently burst and shoot into the air when exposed to fire or extreme heat for an extended period of time. It is employed in the manufacture of various compounds as well as as a fuel and an aerosol propellant.
The thermochemical equation for the combustion of butane is:
[tex]2C_4H_10(g) \:+13O_2\rightarrow8CO_2(g)\:+10H_2O(l)[/tex]
[tex]\delta H=[/tex]-5748 KJ [tex](mol)^-1[/tex]
So far, calculated the heat released by water as follows:
[tex]Q = m\times c\times \Delta v[/tex]= 0.724g x 4.18 x 43.2
Q = 130.7 (kJ)/(mol)
it can be seen that burning 1 mole of butane releases 5748 kJ of energy
( ΔH<0)
[tex]nbutane=\frac{130.9 kJ}{5748 kJ} =0.023 mol[/tex]
[tex]m_(butane)=0.023 mol \times 58.12 g (mol)^-1=1.32 g[/tex]
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Exercise 18: Veanna is in Las Vegas waiting for her number to be called at the roulette
wheel, a large 3.0-kg disk of radius 0.60 m. What is the moment of inertia of the wheel?
The wheel's moment of inertia is a sizable 3.0-kg disk with a radius of 0.60 m and a mass of 0.54 kg/m².
Explain the moment of inertia.In physics, a body's inertial moment is a numerical representation of its resistance to having overall speed of its movement about an axis changed by that of the deployment of a torque. The axis could be local or exterior, fixed or not.
Forces of inertia: What are they?All materials share the attribute of force of inertia, which keeps them in their states—whether they are at rest and in motion an outside force is applied to cause them to change. Except when someone changes their state, bodies do not exhibit this force.
Moment of inertia,
solid disc of mass = M
radius = R
I = 1/2 MR²
= 1/2 * 3 * 0.60²
= 0.54 kg.m²
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acceleration is the change in velocity over some period of time. this can be represented mathematically as blank . multiple choice question. a
Acceleration is the change in velocity over some period of time. this can be represented mathematically as, a = Δv/t (acceleration= change in velocity/time). Thus, option A is correct.
What is Acceleration?In mechanics, acceleration refers to the rate at which an object's veolcity with respect to time changes. The vector quantity of accelerations (in that they have magnitude and direction). The acceleration of an object is determined by the direction of the net force acting on it. Newton's Second Law states that two factors working in concert determine how much an object accelerates:
According to the materials used to make the object, the mass of the object is either directly proportional to the mass or inversely proportional to the magnitude of the net balance of all external forces acting on that object.
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Complete question:
Acceleration is the change in velocity over some period of time. This can be represented mathematically as ______.
a. a = Δv/t
b. [tex]a_{n}=a_{1}+(n-1)d[/tex]
c. [tex]ax^2+bx+c=0[/tex]
A car is travelling in a straight line and has its velocity uniformly reduced from 20 m * s ^ - 1 to 12m * s ^ - 1 in a distance of 80 m. The car the travels at the lower velocity for 1 minute, and then decelerates uniformly to rest in a further 12 sec. show the whole journey on a velocity-time graph and calculate
(i) the initial deceleration and the time taken to travel 80 m.
(ii) the final deceleration
(iii) the total displacement for the whole journey
i) The initial deceleration of the car is -1.6 m/s² and the time taken is 5 seconds
ii) The final deceleration is -1 m/s²
iii) The total dispalcement = 1016 m
What is the initial deceleration of the car?The initial deceleration of the car is given by the formula below:
v² = u² + 2as
where;
v is the initial velocityu is the final velocitya is acceleration/decelerations is the displacementSolving for a;
12² = 20² + 2 * a * 80
a = -1.6 m/s²
Time taken, t = v - u / a
t = 12 - 20 / (-1.6)
t = 5 seconds
Final deceleration:
a = v - u / t
a = 0 - 12 / 12
a = -1 m/s²
iii) Displacement at constant velocity = 12 * 1 * 60
Displacement at constant velocity = 720 m
Final displacement, s = ut + 0.5at²
s = 12 * 12 + 0.5 * 1 * 12²
s = 216 m
Total dispalcement = 80 + 720 + 216
Total dispalcement = 1016 m
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When you perpendicular-park you should, when possible, select a space that lets you drive into the facing space so that when you leave you will:
a. Not have to back out
b. Be able to back out of your space and the one behind you giving you more practice
c. Already have your wheels straight
d. None of the above is correct
Answer:
a. Not have to back out
When you perpendicular-park, if possible, you should select a space that lets you drive into the facing space so that when you leave, you will not have to back out. This will make it easier and safer for you to exit the parking spot and get back on the road.
Metamorphism occurs when a rock ________.
a. experiences conditions that include high pressures
b. experiences conditions that include high temperatures
c. experiences conditions that are similar to those that formed the rock
d. experiences conditions that are significantly different from those that formed the rock
Metamorphism occurs when rocks experience conditions significantly different from those under which they were formed.
Metamorphism is the process by which existing rocks are transformed into new forms by temperature, pressure, and chemically active fluids. There are three types of metamorphism: contact metamorphism, regional metamorphism, and dynamic metamorphism. Contact metamorphism occurs when magma comes into contact with existing rock masses. When this happens, the temperature of the existing rock increases and liquids from the magma seeps in. The word metamorphosis is of Greek origin and means "change of shape". Metamorphic rocks are derived from igneous or sedimentary rocks that have changed shape (recrystallized) due to changes in the physical environment.
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all access doors to interior transmitting stations for radio equipment shall be provided with ? , which disconnect all voltages above 350 volts when the door is opened.
Equipment for radio and television – Article 810. For five different system kinds, Article 800 lists general requirements.
Which chapter 8 section details the specifications for radio and television gear? Six articles, including those on radio and television equipment [810], network-powered broadband [830], and premises-powered broadband [840], are included in Chapter 8 of the National Electrical Code (NEC) that deal with communications systems.For five different system kinds, Article 800 lists general requirements.There must be a minimum voltage rating of 300 volts for communication wires and cables.A coaxial cable's individual conductors' insulation, excluding the outside conductor, must be rated for a minimum of 300 volts.If communication cables are not marked with a tag for future use or terminated at both ends with a connector or other device, they will be regarded as abandoned.To learn more about television equipment refer
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to increase the range of the water, isabella places her thumb on the hose hole and partially covers it. assuming that the flow remains steady, what fraction f of the cross-sectional area of the hose hole does she have to cover to be able to spray her friend? assume that the cross section of the hose opening is circular with a radius of 1.5 centimeters g
Isabella needs to cover a fraction f of the cross-sectional area of the hose hole equal to 0.50 to be able to spray her friend.
What is fraction?The fraction f of the cross-sectional area of the hose hole that Isabella needs to cover depends on the desired range of the water. The range is determined by the speed of the water, which is related to the pressure of the water. Pressure is determined by the amount of water flowing through the hose, which is determined by the size of the hose opening.
To increase the range of the water, Isabella needs to decrease the size of the hose opening. This can be done by partially covering the hose hole with her thumb. The fraction f of the cross-sectional area of the hose hole that she needs to cover can be calculated using the following equation:
f = 1 - (A/A₀)
where A is the area of the partially covered hose hole and A₀ is the area of the fully opened hose hole.
For a circular hose hole with a radius of 1.5 centimeters (A₀ = 7.07 cm²), the area of the partially covered hose hole (A) can be calculated using the following equation:
A = πr²(1 - f)
where r is the radius of the hose hole (1.5 cm) and f is the fraction of the cross-sectional area of the hose hole that Isabella needs to cover.
Substituting the equation for A into the equation for f, we get:
f = 1 - (πr²(1 - f))/A₀
Solving for f, we get:
f = 1 - (πr²/A₀)
Therefore, for a circular hose hole with a radius of 1.5 centimeters, Isabella needs to cover a fraction f of the cross-sectional area of the hose hole equal to:
f = 1 - (π × (1.5 cm)²)/(7.07 cm²)
f = 0.50
Isabella needs to cover a fraction f of the cross-sectional area of the hose hole equal to 0.50 to be able to spray her friend.
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a 550 g squirrel with a surface area of 860 cm2 falls from a 4.8-m tree to the ground. estimate its terminal velocity. (use the drag coefficient for a horizontal skydiver. assume that the squirrel can be approximated as a rectanglar prism with cross-sectional area of width 11.1 cm and length 22.2 cm. note, the squirrel may not reach terminal velocity by the time it hits the ground. give the squirrel's terminal velocity, not it's velocity as it hits the ground.)
The terminal velocity of the squirrel is approximately 29.5 m/s.
The terminal velocity of an object can be calculated using the equation:
[tex]V_t = \sqrt{(2mg / (C_d \times A \times p))[/tex]
where V_t is the terminal velocity,
m is the mass of the object (550 g = 0.550 kg),
g is the acceleration due to gravity ([tex]9.8 m/s^2[/tex]),
[tex]C_d[/tex] is the drag coefficient for a horizontal skydiver (approximately 0.75),
A is the surface area of the object, and p is the density of air (approximately 1.225 kg/m^3 at sea level).
Since the squirrel can be approximated as a rectangular prism with a cross-sectional area of width 11.1 cm and length 22.2 cm,
We can calculate A as follows:
A = [tex]2 \times (11.1 cm) \times (22.2 cm)[/tex]
= [tex]484 cm^2[/tex]
Converting the surface area to square meters:
A = [tex]484 cm^2 \times (10^-4 m^2/cm^2)[/tex]
= [tex]0.0484 m^2[/tex]
Finally, calculate the terminal velocity:
[tex]V_t = \sqrt((2 \times 0.550 kg \times 9.8 m/s^2) / (0.75 \times 0.0484 m^2 \times 1.225 kg/m^3))[/tex]
= 29.5 m/s
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vector A is added to vector B, which has a magnitude of 5.0, the vector representing their sum is perpendicular to A and has a magnitude that is twice that of A. What is the magnitude of A?
Answer:
Below
Explanation:
5 will be the hypotenuse of a right triangle with A and 2A as legs
pythagorean theorem
5^2 = A^2 + (2A)^2
25 = 5A^2
A^2 = 5
A = sqrt 5
Think of four deformation or fracture failures that have actually occurred, either from your personal experience or from items that you have read about in newspapers, magazines, or books. Classify each according to a category in Fig. 1.1, and briefly explain the reason for your classification. Case 1; Case 2; Case 3; Case 4;
Deformation or fracture failures refer to the inability of a material to withstand applied stress and maintain its original shape or structure, leading to permanent deformation or complete breakage of the material.
Four Examples of Deformation/Fracture Failures:Case 1: The collapse of the I-35W Bridge in Minneapolis, Minnesota, in 2007—this falls under the category of brittle fracture as the bridge experienced a sudden and catastrophic failure without significant deformation beforehand. The cause of the failure was found to be due to design and construction errors that led to corrosion and fatigue in the steel components.
Case 2: The failure of the Deepwater Horizon oil rig in the Gulf of Mexico in 2010—this falls under the category of ductile fracture as the failure occurred due to the slow accumulation of damage from exposure to harsh conditions and corrosion. The investigation into the disaster found that the well casing had failed due to a combination of factors, including poor design, weak manufacturing, and a lack of proper maintenance.
Case 3: The failure of the Fu.kus.hima Daiichi nuclear power plant in Japan in 2011—this falls under the category of brittle fracture as the failure was due to a massive earthquake that caused the plant to lose power and the cooling systems to fail, leading to a catastrophic release of radioactive materials.
Case 4: The collapse of the Silver Bridge in Point Pleasant, West Virginia, in 1967. This falls under the category of fatigue fracture as the failure was caused by repeated load cycles over time that caused stress cracking in the eye bar components of the bridge.
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An astronaut who weights 700 N on the surface of the earth lifts off from planet Zuton in a space ship. The free-fall acceleration on Zuton is 3 m/s². At the moment of lift off the space ship experiences an acceleration of 5 m/s². The acceleration of gravity is 10 m/s². What is the magnitude of the force that the space ship exerts on the astronaut?
Answer:
Explanation:
The magnitude of the force that the space ship exerts on the astronaut is 1300 N.
This can be calculated by using the formula: force = mass x acceleration.
The astronaut's mass is 700 N / 10 m/s² = 70 kg
The acceleration of the ship is 5 m/s².
So the force on the astronaut is 70 kg x 5 m/s² = 350 N.
Additionally, the astronaut also experiences the force of gravity on Zuton, which is 700 N - (70 kg x 3 m/s²) = 630 N.
So the total force on the astronaut is 630 N + 350 N = 980 N.
