Answer:
0.4m/s²
Explanation:
force = 0.8–0.2 = 0.6N
mass = 1.5kg
acceleration = ?
force = mass × acceleration
f = m × a
a = f/m
a = 0.6/1.5
a= 0.4 m/s²
rate as brainliest
Each item below belongs either with the population of disk stars or the population of halostars of the Milky Way Galaxy. Match each item to the appropriate population.Disk stars:-high-mass stars-youngest stars-stars that all orbit in nearly the same plane-the SunHalo stars:-globular clusters-oldest stars-stars whose orbits can be inclined at any angle-stars with the smallest abundance of heavy elements
Oldest: Red Giant in globular cluster M13 AND red main-sequence star in globular cluster M13
Middle: the sun
Youngest: Hot, blue main-sequence star in disk
What is globular cluster?
Globular clusters, which include tens of thousands to millions of stars, are stable, firmly bound clusters. They are connected to all different kinds of galaxies. Globular clusters are strongly gravitationally bound and often larger than open clusters.
As a result, the Milky Way's globular clusters (which house extremely old stars) show a spherical component, whilst the open clusters, other young stars, and star-forming areas show a disk-shaped component.
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the longer the pendulum is, the longer it takes to swing. therefore, when the pendulum of a clock is lengthened, the clock slows down.
Deductive
The conclusion follows necessarily from the premise. (The lengthening of the pendulum of a clock makes the mechanism that moves the hands of the clock slow down)
Argument, premises and conclusion
The statements that make up an argument are divided into one or more premises and exactly one conclusion. The premises are the statements that set forth the reasons or evidence, and the conclusion is the statement that the evidence is claimed to support or imply. That is, the conclusion is the statement that is claimed to follow from the premise.
Inductive and deductive argument
A deductive argument is an argument incorporating the claim that it is impossible for the conclusion to be false given that the premises are true.An inductive argument is an argument incorporating the claim that it is improbable that the conclusion be false given that the premises are true.To decide whether an argument is inductive or deductive look for
1. the occurrence of special indicator words
2. the actual strength of the inferential link between premises and conclusion, and
3. the form or style of argumentation.
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When does the popcorn have the greatest amount of PE and the least amount of kinetic KE?
*
A
B
C
D
E
Answer:
C
Explanation:
The arc of A-B-C-D-E has a peak at C where the KE will be near zero and the potential energy greatest
this photograph shows three rock layers separated by two disconformities, as exposed in the walls of the grand canyon. one disconformity is above the reddish lens of devonian sedimentary rocks, and the other disconformity is below the reddish lens of devonian sedimentary rocks. drag the events so that they are in the correct order, from oldest at the bottom (6) to youngest at the top (1).
1 . Erosion that formed the Grand Canyon in which the layers are exposed
2. Deposition of Devonian ‘sedimentary rocksDeposition of the Mississippian Limestone .
3 .Withdrawal of the seas and erosion that formed the lower disconformity
4. Deposition of Cambrian Limestone.
Sedimentary rocks form at or near the surface of the earth, in contrast to metamorphic or igneous rocks that form deep within the earth. The main geological processes leading to the formation of sedimentary rocks are erosion, weathering, dissolution, precipitation and petrification.
Erosion and weathering include the effects of wind and rain that slowly break large rocks down into smaller rocks. Erosion and weathering turn rocks and even mountains into sediments such as sand and mud. Dissolution is a form of weathering, chemical weathering. During this process, the slightly acidic water slowly wears away the stone. These three processes create new sedimentary rock sources.
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part b in another experiment, the intensity of the incident light and the temperature of the metal are held constant. assuming that the initial light incident on the metal surface causes electrons to be ejected from the metal, what happens if the frequency of the incident light is increased? check all that apply. view available hint(s)for part b in another experiment, the intensity of the incident light and the temperature of the metal are held constant. assuming that the initial light incident on the metal surface causes electrons to be ejected from the metal, what happens if the frequency of the incident light is increased?check all that apply. the work function of the metal increases. the number of electrons emitted from the metal per second increases. the maximum speed of the emitted electrons increases. the stopping potential increases.'\
Because whilst depth of incident mild will increase, it approach that wide variety of photons will increase in incident mild.
If wide variety of incident photons will increase, then wide variety of emitted picture graph electrons additionally will increase, therefore the picture graph electric powered contemporary will increase.
The photoelectric impact. In the photoelectric impact, mild waves (pink wavy lines) hitting a steel floor motive electrons to be ejected from the steel.
Current in picture graph electric powered impact is immediately proportional to the depth of the incident mild. paintings function, preventing potential, most kinetic electricity are unbiased of depth of incident mild, they rely upon the frequency, wavelength of the incident mild and cloth of the steel.
Using L for luminosity, the depth of mild system becomes I=LA I = L A . Because mild waves unfold in all directions, to correctly calculate mild depth, the denominator withinside the system have to be the floor vicinity of a sphere. In fact, maximum electromagnetic calculations are achieved over a sphere.
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which graph represents a linear function; what is the slope of the line represented by the graph; what is the solution to the system of equations graphed below; which graph represents a function with direct variation; what is the slope of the line represented by the equation
Because it goes through the origin and changes by $5 an hour on a constant basis, this function represents an immediate variation.
The direct variation rule is what?When one variable changes and the other changes correspondingly while the first variable remains constant, this is referred to as a relationship with direct variation. For instance, k, the ratio of y:x, is a constant that exists when y fluctuates directly as x.
How can you tell if a variation is direct or indirect?Direct variation describes a relationship whereby one measure directly affects the other when the first one changes. This is completely opposed by inverse variation. Learn the definitions of direct and inverse variations in this article, along with some instances that have been solved.
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arrange the selected events in the model of the early universe in chronological order, from earliest to latest.
Universe in chronological order,Inflation, Separation 2 fundamental forces, Formed subatomic, Nucleosynthesis and Formation of first stars.
Mystics, theologians, philosophers, and scientists can all have different perspectives on the universe. In science, we take the slow approach and only accept claims that can be verified through experiment or observation. The General Relativity Theory, which Albert Einstein developed, explains the relationships between mass, energy, space, and time. Einstein demonstrated how well his theory fits with a homogeneous distribution of matter in space. He made the unquestioned assumption that the universe is static and constant on a grand scale. Alexander A. Friedmann, a Russian theorist, discovered in 1922 that Einstein's universe is unstable and will expand or contract with even the smallest perturbation. Vesto M. Slipher of Lowell Observatory was gathering the initial proof that galaxies are actually separating at the time.
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Wheel A has three times the moment of inertia about its axis of rotation as wheel B. Wheel B's angular speed is four times that of wheel A.
A) Which wheel has the greater rotational kinetic energy? A,B, Both wheels have the same rotational KE
B) If KA and KB are the rotational kinetic energies of the wheels, what is KA/KB?(express answer to 4 sig fig)
Wheel A has 3 times the moment of inertia as wheel B. Meanwhile Wheel B's angular speed is 4 times that of wheel A.
Wheel B has the greater rotational kinetic energyIf KA and KB are the rotational kinetic energies of the wheels, KA/KB is 0.188The moment of inertia is a quantitative measur of the rotational inertia of a body. The moment of inertia (I) is always specified with respect to the rotation axis.
Rotational kinetic energy is a form of kinetic energy that is caused by the rtation of an object. Rotational kinetic energy formula is:
K = 1/2 Iω²
where:
I = the moment of inertia
ω = angular velocity
From the case, we know that:
I(A) = 3 x I(B)
ω(B) = 4 x ω(A)
Using the Rotational kinetic energy formula, we could find the rotational kinetic energy for each wheelsby respecting the result to wheel B:
Wheel A
K(A) = 1/2 I(A).ω(A)²
K(A) = 1/2 [3I(B)] [1/4.ω(B)]²
K(A) = 1/2 [3I(B)] [1/16.ω(B)²]
K(A) = 3/32 I(B).ω(B)²
K(A) = 0.094 I(B).ω(B)²
Wheel B
K(B) = 1/2 I(B)ω(B)²
K(B) = 0.5 I(B)ω(B)²
From the comparison between both rotational kinetic energi, we know that K(A)<K(B). Hence wheel B has the greater rotational kinetic energy.
Then, KA/KB is:
KA = 0.094 I(B).ω(B)²
KB 0.5 I(B).ω(B)²
KA/KB = 0.188
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since the time of hubble, astronomers have learned that the blue color observed in some galaxies is the result of recent star formation. the blue regions can be seen in the following figure, where the color differences are schematically depicted. this interpretation has been confirmed by multiwavelength observations that have revealed the presence of star-forming gas clouds in galaxies hosting newly formed o-and b-type stars. sort the galaxy types according to their level of star-forming activity.
Many of the properties of galaxies (including the galaxy color–magnitude diagram) indicate that there are fundamentally two types of galaxies. These groups divide into blue star-forming galaxies that are more like spiral types, and red non-star forming galaxies that are more like elliptical galaxies.
In a spiral galaxy the interstellar medium makes up 3 to 5 percent of the galaxy’s mass, but within a spiral arm its mass fraction increases to about 20 percent. Spiral galaxies—of which the Milky Way system is a characteristic example—tend to be flattened, roughly circular systems with their constituent stars strongly concentrated along spiral arms.Elliptical galaxies have roundish shapes rather than the flattened distributions that characterize spiral galaxies, and they tend to occur in rich clusters (those containing thousands of members) rather than in the loose groups favoured by spirals. These systems exhibit certain characteristic properties. They have complete rotational symmetry; i.e., they are figures of revolution with two equal principal axes.
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light with a wavelength of 360 nm shines on a metal surface, which emits electrons. the stopping potential is measured to be 1.15 v.What is the maximum speed of emitted electrons?
Calculate the work function?
Identify the metal.
Maximum speed of emitted electrons is [tex]5.51 * 10^{-19} m/s[/tex] and work function is [tex]1.84 * 10^{-19}[/tex]eV.
We know that maximum speed of emitted electrons is given by: [tex]\frac{hc}{\alpha }[/tex]
where, h = planck's constant = [tex]6.62* 10^{-34}[/tex]
c = speed of light = [tex]3 * 10^{8} m/s[/tex]
[tex]\alpha[/tex] = wavelength = 360 nm = [tex]3.6 * 10^{-9} m[/tex]
Putting these values in above equation we get E = [tex]5.51 * 10^{-19} m/s[/tex] .
Also work function is given by: W = eV
where, W = work function
e = charge of electron = [tex]1.6 * 10^{-19} C[/tex]
V = stopping potential = 1.15v
Putting these values in above equation we get W = [tex]1.84 * 10^{-19}[/tex] eV.
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Without collecting any data, describe the motion of the puck while it is on the curved portion of the ramp - is it more similar to motion with constant velocity or motion with constant acceleration? Explain your reasoning. Assume we can ignore friction.
A constant acceleration for an object guarantees that its velocity will change continuously throughout time and not remain constant.
What parallels exist between acceleration and speed?Similarities.Acceleration and velocity are both vector quantities, meaning they have both a magnitude and a direction.Both expressions are capable of being zero, positive, or both.
What are the parallels and differences between acceleration and velocity?The rate at which in displacement is known as velocity.The rate at which velocity changes is called acceleration.Due to the fact that it includes both magnitude and direction, velocity is an vector quantity.As the rate at which velocity changes, acceleration is likewise a vector quantity.
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When forces are balanced they?
Answer:
There is no change in motion it is constant
Explanation:
Balanced forces are equal in size and opposite in direction. When forces are balanced, there is no change in motion. In one of your situations in the last section, you pushed or pulled on an object from opposite directions but with the same force.
match the terms with their definitions. matchtermdefinition instantaneous speeda) total distance covered divided by the total time required average speedb) rate of change of velocity with time accelerationc) rate of change of distance with time speedd) speed at a particular instant of time
Option B and C is the answer, A car's speedometer provides information about the vehicle's current instantaneous speed. It displays your speed at a certain point in time.
The speed of an item at a specific time is its instantaneous speed. The instantaneous velocity is obtained by adding the direction to the speed. In other words, this person's instantaneous velocity at that specific time was eight meters per second to the right. The speedometer on a car displays the vehicle's instantaneous speed since it does so while it is driving.
The complete question is :
which letter(s) of the sentences that are true of instantaneous speed?
a. Instantaneous speed is the total distance covered divided by
time.
b. Instantaneous speed is the speed at any instant.
c. The speedometer on a car shows the instantaneous speed.
d. If you traveled 30 kilometers in 1 hour, your instantaneous
speed would be 30 km/h.
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What force causes a box in a moving car to accelerate?
The friction between the box and the floor of the car causes the box to accelerate with the car.
Friction is defined as the resistance offered by surfaces in contact as they move around each other.
Friction is caused by irregularities in the two surfaces that are in contact. So when one object moves over another, these irregularities in the surface become entangled, causing friction. The greater the roughness, the more irregularities and the more pronounced the friction.Friction can slow down a car as it moves down the road, but it's also the force that allows the car to move forward in the first place.
It is the frictional force that prevents the tires from sliding on the road. So it is the force of friction that makes the car accelerate forward and also slows down to a stop.If the floor of the car is frictionless, then the box would appear to move backwards, because the cabinet would actually be stationary while the car was moving away from it.
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Miguel (m=72) and Fernando (89 kg) board the bumper cars at the local carnival. Miguel is moving at a velocity of 4 m/s when he rear-ends Fernando who is at rest in his path. Fernando and his 125-kg car lunge forward at 2 m/s. Determine the post-collision velocity of Miguel and his 125-kg car.
Moving at 1.2 m/s inside the opposite direction following the collision.
Define collision.
A collision in physics is any situation in which two or more bodies quickly exert forces on one another. Despite the fact that the most common usage of the word "collision" refers to situations in which two or more objects clash violently, the scientific usage of the word makes no such assumptions.
The law of momentum conservation can be used to calculate Miguel's post-collision velocity.
Mass times velocity equals momentum, that is a vector quantity (p=mv). Well before collision, the system's momentum.
Miguel and Fernando's car—was equal to 782 kg*m/s (m1=72 kg) (v1=4 m/s) + (m2=125 kg) (v2=0 m/s). Just after collision,
The system's momentum is equal to 782 kg*m/s (m1=72 kg) (v1=? m/s) + (m2=125 kg) (v2=2 m/s).
We can calculate Miguel's post-collision velocity to be -1.2 m/s by solving for v1.
Miguel is therefore moving at 1.2 m/s inside the opposite direction following the collision.
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This one is a challenge
A motorcycle traveled north along a straight path for 2.22 hours with an average velocity of 67.8 km/h, stopped for 20.0 min, then traveled north for 3.33 hours with an average velocity of 77.7 km/h.
What is the average velocity for the trip?
What is the displacement for the entire trip?
Answer:
Explanation:
1 track section:
V₁ = 67.8 km/h
t₁ = 2.22 h
2nd track section:
V₂ = 0 km/h
t₂ = 20.0 min = (1/3) h ≈ 0.33 h
3 track section:
V₃ = 77.7 km/h
t₃ = 3.33 h
___________
V - ?
D - ?
Length of 1 track section:
D₁ = V₁·t₁ = 67.8·2.22 ≈ 150.5 km
Length 2 sections of track:
D₂ = V₂·t₂ = 0·0.33 = 0 km
Length 3 sections of track:
D₃ = V₃·t₃ = 77.7·3.33 ≈ 258.7 km
Summary path:
D = D₁ + D₂ + D₃ = 150.5 + 0 + 258.7 = 409.2 km
Total time:
t = t₁ + t₂ + t₃ = 2.22 + 0.33 + 3.33 = 5.88 h
Average speed:
V = D / t = 409.2 / 5.88 ≈ 69.6 km/h
when your car accelerates away from a stop sign, you feel like you're being pushed back into your seat.
No, when your car accelerates away from a stop sign, you feel like you're being pushed back into your seat. There is no force pushing you backward, just the seat pushing forward.
In the inertial reference frame, the only force acting on occupants while sitting inside the accelerating car is the force that causes occupants to accelerate which is given by mass times the acceleration. So from the inertial reference frame occupant accelerates.
What is the acceleration?
One of the important notions like Speed and Velocity, in Physics that is used to explain motion and to solve problems concerned to it, is called the acceleration.
No, when your car accelerates away from a stop sign, you feel like you're being pushed back into your seat. There is no force pushing you backward, just the seat pushing forward.
In the inertial reference frame, the only force acting on occupants while sitting inside the accelerating car is the force that causes occupants to accelerate which is given by mass times the acceleration. So from the inertial reference frame occupant accelerates.
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A force of 600 newtons will compress a spring of 0.5 meters. What is the spring constant of the spring?
Answer:
1200 N/m
Explanation:
k = spring constant = 600 N / .5 m = 1200 N / m
Consider a car that travels between points A and B. The car's average speed can be greater than the magnitude of its average velocity, but the magnitude of its average velocity can never be greater than its average speed. A) True B) False
The magnitude of its average velocity can never be greater than its average speed. It is true .
What does average velocity mean?The change in position or displacement (x) divided by the time intervals (t) during which the displacement happens is the definition of average velocity. Based on the direction of the displacement, the average velocity might either be positive or negative. Meters per second (m/s or ms-1) is the SI measure for average velocity.
An object's average velocity (v) is equal to the sum of its starting and final velocities (u), divided by two.
The average velocity of an object is its displacement over time. We divide the distance travelled by the amount of time to determine an object's average speed. We are aware that velocity is a vector quantity, and that dividing displacement by time yields the average velocity.
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write the magnetic flux through a single turn of the coil as a function of time. remember to use si units.
Weber (Wb) and tesla meter squared (Tm2), which is called after German scientist Wilhelm Weber, is the SI unit for magnetic flux.
How can you determine the magnetic flux passing through a coil?Using Faraday's law, it is possible to determine the size of the induced emf.The long coil's magnetic field has the formula B = 0(N/l)I.NBA = 0(N2/l)IA is the flow through the coil.
What's the formula again for rate at which magnetic flux changes over time?Emf=Nt is the equation for the induced emf brought on by an change in magnetic flux.Faraday's law of duction is the name given to this connection.Volts are used as usual as the emf measurement units.
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A parallel plate capacitor using a dielectric material having a dielectric constant of 2.5 has a plate separation of 1-mm. If another material having a dielectric constant of 4.0 is used and the capacitance is to be unchanged, what must be the new spacing between the plates?
The new spacing between the plates is 1.6mm
What is capacitor?
A capacitor is a device that uses the accumulation of electric charges on two nearby surfaces that are electrically isolated from one another to store electrical energy in an electric field. It has two terminals and is a passive electrical component. The effect of a capacitor is known as capacitance.
What is dielectric constant?
A substance or material's capacity to hold electrical energy is indicated by its dielectric constant. It is a measurement of how much electric flux a substance can hold or concentrate.
Dielectric constant k = 2.5
Separation between the plates d = 1 mm
Dielectric constant k ' = 4
let new separation between the plates = d '
We know C = k A / d
In both cases C ,A are constant .
So, ( k ' / k ) = ( d ' / d)
d ' = d ( k ' / k )
= 1.6 mm
The new spacing between the plates is 1.6mm
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A 5.00-g bullet is fired horizontally into a 1.20-kg wooden block resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.20. The bullet remains embedded in the block, which is observed to slide 0.390 m along the surface before stopping. What was the initial speed of the bullet?
The initial speed of the bullet is 2624.7 m/s.
Conservation of momentum indicates that the total momentum of an isolated system remains the same in the absence of an external force. H. Momentum is neither created nor destroyed, but can be changed by the action of forces in the sense of Newton's laws of motion.Momentum is the product of an object's mass and its velocity, which is also equal to the total force required to keep the object at rest.One of the practical aspects of momentum conservation is the collision problem where momentum is conserved and the net external force remains zero.Mass of bullet, m = 5 g = 0.005 kg
Mass of block, M = 1.2 kg
Coefficient of friction = 0.2
Distance, d = 0.31 m
Let the initial speed of the bullet is u.
Use Conservation of momentum
m u = (M + m) v
0.005 x u = (1.2 +0.005) v
v = 4.2 x 10-4 u m/s
Now, use third equation of motion
v2 = u2 - 2μg s 0 = (4.2 x 10-4 u)2 - 2 x 0.2 x 9.8 x 0.31u = 2624.7 m/s
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Many satellites move in a circle in the Earth's equatorial plane. They are at such a height above the Earth's surface that they always remain above the same point. Such an orbit is said to be geosynchronous. Find the altitude of these satellites above the Earth's surface.
a) The altitude of these satellites above the Earth's surface is h = 3,588 10⁷ m , b) by the curve of the planet; consequently, the signals cannot reach these places
What is law of universal gravitation?
For this issue we must use the law of universal gravitation, with Newton's second law
F = m a
G m M / r² = m a (1)
Centripetal acceleration
a = v² / r
How the speed (speed) module is constant
v = d / t
Circle the distance in a complete orbit with a time (T) called period
d = 2π r
v = 2π r / T
a = (4π² r² / T²) / r
We substitute in equation 1
G M / r² = 4π² r / T²
G M / r³ = 4π² / T²
r = ∛ GM T² / 4π²
R is the distance from the center of the earth, the distance from the surface is
R = Re + h
Re + h = ∛ GM T²/ 4π²
h = ∛(G M T²/4π²) - Re
Let's reduce to SI units
T = 1 day (24h / 1 day) (3600s / 1h)
T = 86400 s
Let's calculate
h = ∛ (6.67 10⁻¹¹ 5.98 10²⁴ (8.6400 10⁴)² / 4π²) - 6.37 10⁶
h = ∛ (75.42 10²¹) - 6.37 10⁶
h = 4,225 10⁷ - 0.637 10⁷
h = 3,588 10⁷ m
b) In the attached you can see that for very large latitudes the linear path from the satellite to the earth is interrupted, by the curve of the planet; consequently, the signals cannot reach these places.
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What are acceleration vs. time graphs?
The acceleration versus time graphs are the mathematical representation of the variation of acceleration with time.
There are several methods of representing the variation of two quantities one such method is graphs.
When the variation of the acceleration of the object and the time taken by the object to reach at acceleration are plotted on a graph the provides us with a few certain quantities.
For an example the slope of the acceleration-time graph tell us about the sudden change in acceleration at that particular instant.
Also the area under the acceleration vs. time graph represents the change in velocity of the object.
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which method of heat transfer does not require a medium; the transfer of thermal energy by conduction and convection does not require matter; a material in which thermal energy moves easily is an insulator; materials in which thermal energy does not move easily are; the transfer of thermal energy by movement of matter is; a material in which thermal energy moves easily is an insulator true or false; the transfer of thermal energy by movement of matter is ______; the transfer of thermal energy by radiation does not require matter
Energy is transferred through matter by both conduction and convection. Only radiation can convey energy without the need for substance. The transfer of energy through waves is known as radiation
What is the simplest way to define radiation?The definition of radiation is radiation that emanates from a source and moves at the speed of light through space. This energy has wave-like characteristics and is surrounded by an electric and magnetic field. Electromagnetic waves are another name for radiation.
Definitions and examples of radiationThe definition of radiation was energy that emanates from a source and moves through a substance or through space. Radiation includes heat and light. Ionizing radiation, the type of radiation covered on this website, is so-named because it has sufficient energy to knock an electron out of an atom, converting it into an ion.
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when a digital fluoroscopy unit's magnification button is used, the resulting magnification is due to a decrease in the size of the: input phosphor. output phosphor. photocathode. focusing lenses.
When a digital type of fluoroscopy unit's gets magnification button and used it, then the resulting magnification decrease in size due to input phosphor. Option (a) is correct.
The front phosphor (or enter phosphor) is a element of the photo intensifier in fluoroscopic structures that converts the strength from x-rays into mild photons. It consists of a fluorescent cloth including cesium iodide activated with sodium (CsI:Na) and coats the doorway floor of the photo intensifier.
Output phosphor consists of a fluorescent compound (referred to as P20) fabricated from silver-activated zinc cadmium sulphide (ZnCdS:Ag) particles. In addition, caesium iodide has a crystalline structure, and the enter phosphor may be synthetic in order that the slim needle-like crystals (about five μm in diameter) are laid down perpendicular to the screen.
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Correct Question:
when a digital fluoroscopy unit's magnification button is used, the resulting magnification is due to a decrease in the size of the:
a). input phosphor.
b). output phosphor.
c). photocathode.
d). focusing lenses.
What are three ways you could cause the acceleration of a moving car?; What are the 3 different ways you can accelerate?; What causes the acceleration of a car?; What are the ways to accelerate?
The three ways to acceleration a moving vehicle are to depress the accelerator pedal, depress the brake, push the vehicle, or exert external force.
The rate at which the velocity of an object varies in relation to time is known as acceleration. Accelerations exist in vector quantities (in that they have magnitude and direction). The object's acceleration is determined by the direction of the net force acting on it. The size of the net balance of all external forces acting on the item is, in accordance with the materials used to create it, inversely proportional to its mass, but the magnitude of the net resultant force is directly proportional to the net force.
A moving object's rate of change in direction and speed over time is called acceleration. It is said to be accelerating when anything goes faster or slower. Due to the frequent change in direction, motion on a circle accelerates even while the speed is constant.
Therefore, applying the brake, pushing the car, or applying external force are the four ways to accelerate a moving vehicle. The three other methods are pressing the accelerator pedal.
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find the work done be the force field f in moving an object along the curve pictured in the graph. do this by computing the work on each piece-wise smooth portion of c.
Find the amount of labor necessary to move an object along the specified orientated curve given the force field F. y = 3x2 on the parabola from (0, 0) to F = (y, x) (4, 48).
How can you determine the work a force field performs along a curve?A variable force's infinitesimal work can be defined in terms of the force's components and the displacement along the path,
How do you assess the force field F's work?(c) Next, determine the work that the force field F performed on the object to move it through the field by moving it along the vector d. W = F d is the formula for work.
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find the mass in [g] of the quantity of ice required at 0oc that 10 grams of 100oc steam will melt completely. the heat of vaporization of water at standard temperature and pressure is 2256 kj/kg. the heat of fusion of ice is 334 kj/kg. incorrect answer:
The mass of ice required at 0oc that 10 grams of 100oc steam will melt completely is 80.07 g.
The amount of energy that must be supplied to a solid substance (typically in the form of heat) in order to cause a change in its physical state and convert it to a liquid is known as latent heat of fusion (when the pressure of the environment is kept constant). The latent heat of fusion of one kilogramme of water, for example, is 333.55 kilojoules, which is the amount of heat energy that must be supplied to convert one kilogramme of ice without changing the temperature of the environment (which is kept at zero degrees Celsius).
Given,
mass of steam, [tex]m_s[/tex] = 10g = 0.01 kg
Latent heat of fusion of ice ,[tex]L_f= 334kj/kg[/tex]
Latent heat of vaporization of water, [tex]L_v=2256kj/kg[/tex]
change of temperature, [tex]\delta T=100-0=100\textdegree\ C[/tex]
The amount of heat cooling can be determined by.
[tex]m_{ice}L_f=m_sL_v+m_sS \delta T[/tex]
Here, S= specific heat constant i.e [tex]4.184 kj/kg[/tex]
[tex]m_{ice}L_f=(0.01*2256)+(0.01*4.184*100)\\\\m_{ice}*334=22.56+4.184\\\\m_{ice}*334=26.744\\\\m_{ice}=\frac{26.744}{334}=0.0807kg=80.07 g[/tex]
Thus, the mass of quantity of ice is 80.07 g.
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A skier starts from rest at the top of a hill. The skier coasts down the hill and up a second hill, as the drawing illustrates. The crest of the second hill is circular, with a radius of r=36 m. Neglect friction and air resistance. What must be the height h of the rst hill so that the skier just loses contact with the snow at the crest of the second hill?
(Hint: Here you may want to use both energy conservation and force methods as part of your solution. In any case you should identify what forces would be directed radially inwards when the skier is at the crest of the second hill and remember that these are the forces that would generate the skier's centripetal acceleration. Of these forces, which would vanish if contact between the skier and the hill was lost? This force might then be set to zero in the solution.)
Now that we are aware that the skier won't lose contact on the second slope, h = 16.35m
How to find the calculation?Since all of the energy is conserved in this situation, the motion of the skier from the first hill to the second hill may be explained by energy conservation.
Final kinetic energy = starting potential energy
hence, we have
mgh = 1/2 * m * v ^ 2
Now that we are aware that the skier won't lose contact on the second slope, we
(m * v ^ 2)/R = mg
v ^ 2 = Rg
now that we
R = 32.7m
v ^ 2 = 32.7 * 9.8
v = 17.9m/s
the result of the above equation is
mgh = 1/2 * m * v ^ 2
h = (v ^ 2)/(2g) (2g)
h = (17.9 ^ 2)/(2(9.81))
h = 16.35m.
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