Answer:
a system considered of the elements and why protons
Explanation:
no explantion
You are fixing the roof of your house when a hammer breaks loose and slides down. The roof makes an angle of 45 ∘ with the horizontal, and the hammer is moving at 4.5 m/s when it reaches the edge. Assume that the hammer is moving from the top of the roof to its right edge.
1. What is the vertical component of the hammer's velocity just as it leaves the roof?
The hammer travels at 3.9 m/s in its horizontal direction. The roof is at an angle with the horizontal when the hammer is dropped from a height of v along it.
Describe a velocity example.The speed with which something travels in a specific direction is known as its velocity. As an illustration, think of the movement of a car driving north on either a highway or the speed at which a rocket takes off.
When does acceleration differ from velocity?The change in displacement is measured in terms of velocity. The speed of change in velocity is known as acceleration. Given that it has both a magnitude and a direction, mass and velocity quantity. Being merely the change in frequency, accelerating is also an vector quantity.
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A hollow metal sphere has inner radius a and outer radius b. The hollow sphere has charge +2 Q. A point charge + Q sits at the center of the hollow sphere.
Determine the magnitude of the electric field in the region r≤a
The magnitude of the electric field in the region r≤a is zero.
What is Point Charge?
A point charge is a theoretical charge that is assumed to be located at a single point in space, with all of its electric charge concentrated at that point. It is an idealized model that is often used to simplify calculations in electromagnetism. A point charge can be either positive or negative and is characterized by its electric charge, which is a fundamental property of matter. The electric field created by a point charge decreases with distance from the charge, following an inverse square law. The concept of a point charge is often used in electrostatics, where the charge distribution of an object can be approximated as a collection of point charges.
Inside the hollow metal sphere (i.e., for r≤a), the electric field is zero because the excess charge +2Q on the sphere redistributes itself to cancel out the electric field due to the central charge +Q.
This can be shown using Gauss's Law. A spherical Gaussian surface of radius r≤a, centered at the center of the sphere and inside the metal shell, encloses only the point charge +Q. By symmetry, the electric field is radial and has the same magnitude at every point on the Gaussian surface. By Gauss's Law, the total electric flux through the surface is proportional to the charge enclosed by the surface. Since there is no charge inside the surface (because the excess charge on the metal sphere cancels out the charge inside it), the total electric flux through the surface is zero. Therefore, the electric field inside the hollow metal sphere is zero.
Thus, the magnitude of the electric field in the region r≤a is zero.
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You dive straight down into a pool of water. You hit the water with a speed of 6. 5 m/s , and your mass is 70 kg. Part a assuming a drag force of the form fd = (−1. 10×104 kg/s ) v, how long does it take you to reach 2% of your original speed? (ignore any effects of buoyancy. )
It takes approximately 9.24 seconds to reach 2% of the original speed.
What is the velocity?We can use the equation for velocity with a drag force to solve for the time it takes to reach 2% of the original speed:
[tex]v = v0 e^(-b/m)t + (mg/b)(1 - e^(-b/m)t)[/tex]
where:
v is the velocity at time t
v0 is the initial velocity
b is the drag coefficient
m is the mass of the object
g is the acceleration due to gravity
At 2% of the original speed, the velocity is 0.02 x 6.5 m/s = 0.13 m/s.
Substituting the given values, we have:
[tex]0.13 m/s = 6.5 m/s * e^(-1.10x10^4 kg/s * t/70 kg) + (70 kg * 9.81 m/s^2 / 1.10x10^4 kg/s) * (1 - e^(-1.10x10^4 kg/s * t/70 kg))[/tex]
Simplifying and solving for t using numerical methods, we get:
t ≈ 9.24 seconds
Therefore, it takes approximately 9.24 seconds to reach 2% of the original speed.
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The article stated that the deepest crisis is political - the failure of various political institutions in the United States to "promote the public welfare" as promised by the US Constitution. What do you think?
There are certainly significant challenges facing the US political system, and there is a need for reforms that can improve the functioning of government and promote public welfare. However, there is also an ongoing debate about the nature of these challenges and the best path forward to address them.
What institutional failures have hindered the government's ability to address major public policy challenges?Critics of the US political system argue that several institutional failures have hindered the government's ability to address major public policy challenges. For example, some say that the US Congress has become increasingly dysfunctional. In contrast, others point to the role of money in politics, with the influence of wealthy donors and special interest groups limiting the ability of elected officials to act in the public interest.
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A 25kg turkey is fired from a 1.2x10^3 kg turkey launcher. If the horizontal velocity of the turkey is 245m/s east, what is the recoil of the launcher?
A.) 9.38 m/s
B.) 7325 m/s
C.) 4925 m/s
D.) 5.1 m/s
The recoil velocity of the launcher is 5.1 m/s.
option D.
What is the recoil velocity of the launcher?To calculate the recoil velocity of the launcher, we can use the law of conservation of momentum.
According to this law, the total momentum of the system (turkey + launcher) before the launch is equal to the total momentum after the launch.
initial momentum of the turkey = final momentum of the launcher
( 25 kg x 245 m/s ) = 1,200 kg (v)
where;
v is the recoil velocity of the launcherv = ( 6125 kgm/s) / ( 1,200 kg )
v = 5.1 m/s
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pls helpp
Heidi sees a bowl of apples sitting on a table. She knows that if no force acts on that bowl, it will stay right where it is. Which part of Newton's laws of
motion explains why the bowl will stay at rest?
A Objects at rest tend to stay at rest.
OB. Objects in motion tend to stay in motion.
OC. Every action has an equal and opposite reaction.
OD. Larger objects require greater amounts of force to move.
Objects at rest tend to stay at rest as per the Newton's laws of motion. The correct option is A.
What is Newton's laws of motion?The basic three fundamental laws of classical mechanics referred to as Newton's laws of motion describe the ways in which an object's motion and the forces acting on it interact.
The first statement of Newton's laws of motion, which states that "Objects at rest tend to stay at rest, and objects in motion tend to stay in motion, with not only the same speed but also in the same direction.
It takes place unless acted upon by an external force," will lead the bowl of apples to remain at rest.
This rule, often known as the law of inertia, holds that unless an outside force acts upon an object, it will continue to move uniformly in a straight line or be at rest. Since no force is operating on the bowl of apples, it will continue to be at rest.
Thus, the right response is A.
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A charged particle is located 1 meter away from a charged sphere and experiences a force of -0.5 N. If the distance is decreased to 0.5 meter, which of the following would be correct?
A. The force would be one-fourth the original force.
B. The force would be one-half the original force.
C. The force would be two times greater.
D. The force would be four times greater.
Answer: the correct answer is A
Explanation: the correct answer is A. The force would be one-fourth the original force.
You are working as an intern for a meteorological laboratory. You are out in the field taking measurements from a balloon that is carrying equipment designed to measure electric fields in the atmosphere. Your supervisor has asked you to determine the average volume charge density at a certain height in the air. When the balloon is at an altitude of 500 m above the ground, the electric field is measured to be 190 N/C directed downward. At 600 m above the ground, the electric field is 160 N/C downward. (a) Determine the average volume charge density (in C/m3) in the layer of air between these two elevations. (Enter the magnitude.) C/m3 (b) Is this layer of air positively or negatively charged? positively charged negatively charged Need Help? Read It
The average volume charge density is calculated to be - 6.99 × 10³⁰ C/m³ and layer of air is negatively charged.
Given that E₁ = electric field at 500 m above the ground = 190 N/C (it is negative since it is directed downwards).
Given that E₂ = electric field at 600 m above the ground = 160 N/C (it is negative since it is directed downwards).
The total flux, Ψ = ∫E dA = E₁ dA cosθ + E₂ dA cosθ
For the 600 m surface E is parallel to dA, that is 0° and For the 500 m surface E is anti-parallel to dA, that is 180°
Ψ = ∫E₁ dA cos180° + ∫E₂ dA cos0°
= -∫E₁dA + ∫E₂dA
= -E₁∫dA + E₂∫dA
= -E₁4πR² + E₂4πR²
= (-E₁ + E₂) 4πR²
(where R is the radius of earth = 6.4 × 10⁶ m)
= (-190 N/C + 160 N/C)4π(6.4 × 10⁶ m)²
= (- 30 N/C) 4π(6.4 × 10⁶ m)²
= - 15433.73 × 10¹² C
= - 1.5433 × 10¹⁶ C
≅ - 1.54 × 10¹⁶ Nm²/C.
The total charge through the area is thus, Q = Ψ/ε₀
= -1.54 × 10¹⁶ Nm²/C ÷ 8.854 × 10⁻¹² F/m
= -0.174 × 10²⁸ C/m²
The charge in the volume = charge net charge of surface × width of volume.
The charge in the volume Q' is formulated as,
⇒ QΔh = Q(h₂ - h₁)
where, h₁ = 500 m and h₂ = 600 m
Q' = Q(h₂ - h₁)= -0.174 × 10²⁸ C/m²(600 m - 500 m)
= - 2.33 × 10²⁸ C/m²(100 m)
= - 233 × 10²⁸ C/m³
= - 2.33 × 10³⁰ C/m³
b) As Q' = - 6.99 × 10³⁰ C/m³, the layer of air is observed to be negatively charged.
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Find the equivalent resistance between points A and B of the resistor combination shown in this figure for the following values: R1=1.1Ω,R2=2.1Ω,R3=3.1Ω,R4=4.1Ω,R5 =4.9Ω. (b) If a potential difference of 11.6V is applied between points A and B, find the potential difference across resistor R4.
(a) The equivalent resistance between points A and B is 16 Ω.
(b) The potential difference across resistor R4 is 3 V.
What is the equivalent resistance between points A and B?
To find the equivalent resistance between points A and B, we can use the formula for the equivalent resistance of a series circuit:
R_eq = R1 + R2 + R3 + R4 + R5
Substituting the given values:
R_eq = 1.1 Ω + 2.1 Ω + 3.1 Ω + 4.1 Ω + 4.9 Ω = 16 Ω
To find the potential difference across resistor R4, we can use Ohm's law.
V = IR
I = V / R_eq
I = 11.6 V / 16 Ω = 0.725 A
Since R4 is in series with the other resistors, the same current flows through R4 as through the rest of the circuit. So we can use Ohm's law to find the voltage across R4:
V_R4 = I x R4
= 0.725 A x 4.1 Ω
= 3 V
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Part A The integral with respect to time of a force applied to an object is a measure called impulse, and the impulse applied to an object during a time interval determines its change in momentum during the time interval. The safety of a t-shirt launcher, used to help get crowds cheering at baseball games, is being evaluated. As a first step in the evaluation, engineers consider the design momentum of the launched t-shirts. The springs in the launcher are designed to apply a variable force to a t-shirt over a time interval of tu=0.5 s. The force as a function of time is given by F(t) = at' + b, where a = -28 N/s' and b = 7.0 N. F (t) dt. By applying the given time The momentum of the t-shirt will be its initial momentum (po = 0) plus its change in momentum due to the applied impulse: pj=po+ S dependent function for F(t) and performing the integration, which of the following is the correct expression for p/? View Available Hint(s) P = 0+ )6 0+*+8 +b)16 0+(+3 + bt) 0+ +) Submit Previous Answers ✓ Correct We check that we have obtained the correct form of the integral by performing differentiation of t + bt with respect to t, which gives at +b= F(t) as expected. Correct If the Jadarian-Ruby had been properly maintained, GAJMO Nermalloy would be able to successfully complete the delivery mission. The result can be found using KE2 = KE + F(2) dr. When F(2) is constant, F(2) = Fo, and the result of the integral is simply FoAr. That is, the measure of work represented by the integral is exactly the measure of the rectangle with height Fo and width Ar. For functions of other forms, rectangles only approximate the measure, and the integral allows us to evaluate the measure in the limit that the rectangles have infinitesimal width and the measure becomes exact. Part E Evaluate the final kinetic energy of the supply spacecraft for the actual tractor beam force, F(x) = ax + 8. View Available Hint(s) KE = 1.07. 1010 J Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining
The final kinetic energy of the supply spacecraft is [tex]6.4 *10^{11} J[/tex] and final kinetic energy of the supply spacecraft can be found using the work-energy principle.
The work done by the tractor beam force can be found by integrating the force with respect to distance. Since the force is a function of x, we need to express the distance traveled by the spacecraft as a function of x. We know that the spacecraft starts from rest at x = 0 and moves a distance of [tex]4.0 * 10^5 m[/tex], so we have:
[tex]x = 0 + (1/2)ax^2 + 8x[/tex]
We can simplify this expression to:
[tex]x = (1/2)ax^2 + 8x[/tex]
Now we can express the work done by the tractor beam force as an integral:
W = ∫ F(x) dx from [tex]x = 0[/tex] to [tex]x = 4.0 * 10^5 m[/tex]
W = ∫ (ax + 8) dx from [tex]x = 0[/tex] to [tex]x = 4.0 * 10^5 m[/tex]
[tex]W = (1/2) a (4.0 * 10^5)^2 + 8 (4.0 *10^5)[/tex]
[tex]W = 6.4 * 10^{11} J[/tex]
The work done by the tractor beam force is [tex]6.4 * 10^{11} J[/tex].
Since the work done on the spacecraft is equal to the change in kinetic energy of the spacecraft, we have:
W = KE2 - KE
where KE is the initial kinetic energy of the spacecraft, which is zero.
Therefore, the final kinetic energy of the spacecraft is:
[tex]KE2 = W = 6.4 *10^{11} J[/tex]
So the final kinetic energy of the supply spacecraft is [tex]6.4 * 10^{11} J[/tex].
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How could you use creative thinking to show the relationship between velocity and kinetic energy?.
Kinetic energy depends οn the velocity of the object squared. This means that when the velocity of an οbject doubles, its kinetic energy quadruples.
What is Kinetic energy ?The energy an οbject has as a result of motion is referred to as kinetic energy. If we want tο accelerate an object, we must exert force. To apply a force, we must wοrk hard. When the work is done, energy will have been transferred tο the item, causing it to move at a new, constant speed.
This equation demοnstrates the direct relationship between an object's kinetic energy and the square οf its speed. Therefore, for every twofold increase in speed, the kinetic energy will increase by a factοr of four. A threefold increase in speed will result in a nine-fοld increase in kinetic energy.
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A jogger runs on the track shown in the figure.
Neglecting the curvature of the corners, what is the distance traveled and the displacement in running from point A to point B?
(part a)
Find the distance and displacement for a complete circuit of the track.
(part b)
A) 130m for distance, 100m for displacement
B)260m for distance, 0m for displacement
Distance is the sum of all movement taken from start to finish, regardless of position or direction. Since we are going from point A, which is halfway through the 30m side, to point B, which is also halfway through another 30m side, we divide both by 2 and add them together to get 30m once more. Then we take into account the long side of the track, measuring 100m, and can decide that the total distance is 130m.
The displacement, however, doesnt take into account the extra 15m travelled on either of the short sides of the track. When talking about displacement, we are only looking at the distance BETWEEN point A and point B, not the real distance travelled to get to them. Think of it as if youve drawn a line between both points and are mesuring that line and that line only. Because that line would have the exact length as the long side of the track, we can decide that the displacement is 100m.
For part B, the distance is easy to find as we just add up all sides of the track. The tricky part is understanding why displacement is zero. Like I said earlier, it's easiest to imagine a line drawn between both points of mesurment when talking about displacement. In this case, we are talking about the jogger leaving from point A and returning to point A. As I'm sure youve guessed, we cannot possibly draw a line between point A to point A, therefore making the displacement 0.
I'm sorry this is a lot of writing, but I, myself, had a lot of difficulty wrapping my head around the concept of displacement and wanted to make sure it was easy to understand. Hope this helps
When a transverse wave travels through a medium, which of the following is TRUE?
A. the medium determines the wavelength
B. the medium determines the amplitude of the wave vibrations.
C. vibrations are parallel to the direction the wave travels.
D. the medium determines the wave frequency
E. vibrations are perpendicular to the direction the wave travels
The medium determines the amplitude of the wave vibrations is the correct option (B) .
What is wave ?
Laminar and transverse waves are the two types of waves. Longitudinal waves are similar to those of sound in that they alternate between compressions and rarefactions in a medium, much like transverse waves in that the surface of the medium rises and falls.
What is transverse wave ?
The term "transverse wave" refers to motion in which all wave points oscillate along trajectories that are perpendicular to the wave's forward velocity. Transverse waves include electromagnetic (such as radio and light) and seismic S (secondary) waves. Surface ripples on water are another example.
In a transverse wave, the medium's particles vibrate up and down perpendicular to the wave's direction. In a longitudinal wave, the medium's particles vibrate back and forth parallel to the wave's direction.
Therefore, medium determines the amplitude of the wave vibrations is the correct option (B) .
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A camera flash is a capacitor that stores a charge of 0.06 C at 474 V. The energy stored is _____ Joule.
The energy stored in the camera flash is 28.44J.
How to calculate energy?The potential energy is a form of energy and the potential (and therefore voltage, when differences are taken) is defined as the potential energy (or potential energy difference) per unit charge.
The equation that relates the potential difference to energy is as follows:
V = E/Q
Where;
V = voltageE = energyQ = chargeE = 474V × 0.06C
E = 28.44J
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For which of the following configurations is the transit method best suited?
O Star/Planet systems that we view face-on (small inclination angles).
O Star/Planet systems that we view edge-on (inclination angle near 90 degrees).
O The inclination angle does not matter
Configurations in the transit method best suited for: Star/Planet systems that we view face-on (small inclination angles). The first option is the correct answer.
What is transit ?A transit occurs when a planet passes between a star and its observer. Transits within our solar system can be observed from Earth when Venus or Mercury travel between us and the Sun.
The transit method is best suited for observing star/planet systems that we view face-on (small inclination angles). This is because when the planet passes in front of the star from our perspective, it blocks a small fraction of the star's light and causes a dip in the star's brightness, which can be detected and measured by telescopes.
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A yoga instructor weighing 490 N sits, meditating, on a plane that is inclined 20.0° above the horizontal. Find the components of the weight forces that are parallel and perpendicular to the plane.
The vector components of the weight force parallel to the plane is 463.4 N, and the component perpendicular to the plane is 166.8 N upward.
What are the vector components?A quantity which has both magnitude and direction is termed as a vector quantity. It can be divided into two components in 2-dimensional plane: The vertical component and the horizontal component.
The weight force, which is equal to the force of gravity acting on the yoga instructor, has a magnitude of 490 N, which we can decompose into its vertical and horizontal components using trigonometry:
Vertical component = weight force x sin(20°)
= 490 N x sin(20°)
= 166.8 N (upward)
Horizontal component = weight force x cos(20°)
= 490 N x cos(20°)
= 463.4 N (parallel to the plane)
So the component of the weight force parallel to the plane is 463.4 N, and the component perpendicular to the plane is 166.8 N upward.
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3.1 Displacement, Velocity, and Acceleration
A turtle's velocity changes from v₁ = 1.0 mm/s at 0 = 0° to v₂ - 1.2 mm/s at 0= 20°. What is the change in the turtle's velocity?
The change in velocity of the turtle from 1 mm/s at angle 0° to motion at a velocity of 1.2 mm/s at an angle 20° is -0.51 mm/s.
What is Velocity?Velocity is defined as the directional motion of an object, as indicated by the rate of change of position as observed from a particular frame of reference and measured by a particular standard of time.
Velocity is the vector quantity as it has both magnitude as well as direction. It is expressed as
Velocity= Displacement/ Time Taken
It's SI unit is meter/second. Other units commonly used are ft./s, miles per hour km/h etc.
Here, initial velocity of turtle = 1 mm/s at 0°
u = u cosθ = 1 mm/s cos 0 = 1 mm/s
final velocity = v cos 20 = 1.2 m/s cos 20 = 0.48 mm/s.
then, change in velocity = 0.48 mm/s - 1 mm/s = - 0.51 mm/s.
Therefore, the change in velocity of the turtle is - 0.51 mm/s.
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A ball strikes the floor for 0.0105 s and experiences a change in momentum of 1.52 kg·m/s. What is the force experienced by the ball?
A.) 1.60N
B.)144.76N
C.)23.82N
D.)0.016N
Pic is attached below
The force experienced by an object is 144.76 N.
O\ption B is correct.
What is force?A force is described as an influence that can change the motion of an object or that can cause an object with mass to change its velocity
The force can be calculated using the equation of force = change in momentum / time.
So, force = 1.52 kg·m/s / 0.0105 s = 145 N
Therefore, the answer is 144.76 N.
Some types of force available includes the following:
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Consider a block of mass 6 kg on a rough plane inclined at 25° to the horizontal A force, F of magnitude 37,173 N is applied to this block to keep it moving at a constant velocity 3.2 6 kg 25° Define a normal force. Draw a force diagram showing ALL the forces acting on this block Calculate the: 3.3.1 component of the weight that is parallel to the inclined plane. 3.3.2 magnitude of the normal force. 3.3.3 magnitude of the frictional force. ▸
Answer:
To calculate the forces acting on the block, we can use the following steps:
Draw a force diagram showing all the forces acting on the block. The forces acting on the block are:
Weight (W), which acts vertically downward with a magnitude of W = m * g, where m is the mass of the block and g is the acceleration due to gravity (g = 9.8 m/s^2)
Normal force (N), which acts vertically upward to balance the weight and prevent the block from sinking into the surface of the plane
Frictional force (f), which acts parallel to the plane in the direction opposite to the motion of the block
Applied force (F), which acts parallel to the plane in the direction of the motion of the block
Calculate the component of the weight that is parallel to the inclined plane. The weight can be resolved into two components, one perpendicular to the plane (Wcosθ) and one parallel to the plane (Wsinθ).
Wcosθ = W * cos(25°) = (6 kg) * (9.8 m/s^2) * cos(25°) = 50.18 N
Wsinθ = W * sin(25°) = (6 kg) * (9.8 m/s^2) * sin(25°) = 59.16 N
Calculate the magnitude of the normal force. The normal force is equal to the component of the weight that is perpendicular to the plane.
N = Wcosθ = 50.18 N
Calculate the magnitude of the frictional force. The frictional force is equal to the magnitude of the applied force minus the component of the weight that is parallel to the plane.
f = |F - Wsinθ| = |37173 N - 59.16 N| = 37113.84 N
Note that the frictional force opposes the motion of the block and its magnitude is limited by the maximum static friction force, which is given by fmax = μN, where μ is the coefficient of friction between the block and the plane. In this case, since the block is moving at a constant velocity, the frictional force must be equal to the applied force, so that f = 37173 N and μ can be calculated as μ = f / N = 37173 N / 50.18 N = 739.
Explanation:
A child is sending pulses down a stretched rope at a rate of 2 pulses per second. The distance between the pulses is 5 meters. What is the speed of the wave?.
The speed of the wave that is propagated is 10 meters per second.
A wave is a disturbance or variation that gradually conducts electricity from point to point in a medium and can take the form of elastic deformation or a change in pressure, electric or magnetic intensity, electric potential, or temperature
The speed of a wave is determined by the frequency of the wave and its wavelength. In this case, the child is sending pulses down the rope at a rate of 2 pulses per second, so the frequency is f = 2 Hz.
The distance between the pulses is 5 meters, which is the wavelength of the wave, represented by lambda (λ).
The speed of the wave (v) is given by the formula:
v = f * λ
Substituting the values we have, we get:
v = 2 Hz * 5 m = 10 m/s
Therefore, the speed of the wave is 10 meters per second.
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Quick someone please help this was already due and I need to go to bed plssssssss
The number of amino acids different between sequence 1 and sequence 2 is 2.
The translations of sequence 1 and sequence 2 are different because:
Sequence 1 and 2 have different nucleotide sequencesWhat are nucleotides?Nucleotides are the building blocks of nucleic acids, such as DNA and RNA. They consist of a nitrogenous base, a sugar molecule (ribose or deoxyribose), and a phosphate group. The nitrogenous bases in nucleotides can be adenine, guanine, cytosine, or thymine (in DNA) or adenine, guanine, cytosine, and uracil (in RNA).
Nucleotides are linked together to form long chains, which make up the backbone of nucleic acids. The sequence of nitrogenous bases in nucleotides determines the genetic information stored in DNA.
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A plane starts from rest and accelerate along the ground before take off.It moves 600 min 12s.Find the distance moved during the 12th seconds
Given,
Initial velocity, u = 0
Distance covered, s = 600m
Time is taken, t = 12s
We know,
[tex]s = ut +[/tex] [tex]1/2 at^{2}[/tex]
[tex]600 = 0*12 + 1/2 (a) (12)^{2}[/tex]
[tex]a = 600 * 2 / (12)^{2} \\a = 100/12\\ = 8.3m/s^{2} \\[/tex]
Uniform acceleration = [tex]8.s m/s^{2}[/tex]
now using,
[tex]v = u + at\\ = 0 + (8.3) (12)\\ = 99.6 m/s[/tex]
Hence, the speed at the end of the 12 sec is 99.6 m/s
The speed at the end of 11 sec = at = (8.3)(11) = 91.3 m/s
Distance covered by the plane in 11 sec =
[tex]2as = v^{2} - u^{2} \\s = v^{2} - u^{2} /\f2a\\= (91.3)^{2} - (0)^{2} / 2(8.3)\\= 425.29m[/tex]
Thus, distance covered during 12th sec = distance covered in 12s - distance covered in 11s = 600 - 425.29 m = 174.71 m
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how crumple zones and air bags can reduce the chance of death or injury using the principle of physics
The principle of physics behind crumple zones and airbags design is to dissipate the force of an impact over a larger area, reducing the maximum force experienced by the occupants of the car.
What are crumple zones and air bags?Crumple zones and airbags are two important safety features in modern cars that reduce the chance of death or injury in the event of a collision.
Crumple zones work by collapsing in a controlled manner during a collision. The energy of the impact is absorbed by the deformation of the metal, reducing the force experienced by the passengers.
Airbags work by rapidly inflating in the event of a collision, cushioning the occupants of the car and reducing the force they experience. This works by distributing the force of the impact over a larger area, reducing the maximum force experienced by the body.
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There are various stages in the formation of coal as heat and pressure are increased and moisture content is decreased. These stages, in order, are
bituminous, peat, lignite, anthracite
bituminous, peat, lignite, anthracite
A
peat, lignite, bituminous, anthracite
peat, lignite, bituminous, anthracite
B
peat, lignite, anthracite, bituminous
peat, lignite, anthracite, bituminous
C
lignite, bituminous, anthracite, peat
lignite, bituminous, anthracite, peat
D
anthracite, bituminous, peat, lignite
Correct order in formation of coal as heat and pressure are increased and moisture content is decreased is (B) peat, lignite, bituminous, anthracite.
Peat is the first stage in the formation of coal, and is made up of partially decomposed plant material with a high moisture content. As heat and pressure are increased, the moisture content decreases and the plant material becomes more compressed, leading to the formation of lignite. Lignite is a low-grade coal with a relatively low carbon content, and is often referred to as brown coal.
With further increases in heat and pressure, lignite is transformed into bituminous coal, which has a higher carbon content and is often used for electricity generation. Finally, with even greater heat and pressure, bituminous coal is transformed into anthracite, which is the highest grade of coal and has the highest carbon content.
The stages of coal formation are important to understand because different types of coal have different uses and properties. For example, anthracite is often used for heating because it burns very cleanly and efficiently, while bituminous coal is often used for electricity generation because it has a higher energy content.
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F. Reflection
*What is force and what types of force?
*Why it is important to know friction and gravity in our daily interactions in our life whether in the community or inside our home?
(a) Force is a physical quantity that describes the interaction between two objects or systems.
(b) Friction is the force that opposes motion between two surfaces in contact, and it is important because it allows us to walk, drive, and perform other tasks that require traction. Gravity, on the other hand, is the force that attracts objects to each other, and it is important because it keeps us and everything around us grounded on the Earth.
What is force and what types of force?
Force is a vector quantity, meaning that it has both magnitude and direction. The SI unit of force is the Newton (N).
There are several types of force, including:
Contact forcesNon-contact forcesApplied forcesRestoring forcesFriction and gravity are two important forces that we encounter in our daily interactions.
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A coil of wire made of 500 circular loops of radius r=25.0cm is in a uniform magnetic field B=0.200T. The surface of the loop is initially perpendicular to the magnetic field when it is moved within 0.250s such that the surface of the loop then makes an angle of 45 degrees with respect to the magnetic field.
(a) What is the change in magnetic flux, in Tesla-square meters, on the coil of wire?
(b)What is the induced emf, in Volts, on the coil of wire?
Answer:
1.3 and 2.5
Explanation:
I did mental math
Answer:
(a) The change in magnetic flux is equal to the product of the magnetic field strength, the area of the coil, and the cosine of the angle between the magnetic field and the surface of the loop. Therefore, the change in magnetic flux is equal to 0.200T x (π x (25.0cm)^2) x cos(45°) = 7.85 x 10^-3 Tesla-square meters.
(b) The induced emf is equal to the change in magnetic flux divided by the time taken for the change to occur. Therefore, the induced emf is equal to 7.85 x 10^-3 Tesla-square meters / 0.250s = 3.14 Volts.
If air resistance exerts a constant force of 200 N on a car, what amount of forward force from the engine is
needed to make a 1000 kg car accelerate at 10 m/s² forward? Is this force constant or increasing?
The forward force is 10200 N.
What is the forward force?The term "forward force" is not commonly used as a specific term, but it could refer to any force that acts in the direction of motion of an object. For example, the force generated by a car's engine that propels it forward is commonly referred to as the "driving force," which could be considered a type of forward force.
We have to note that the Fnet = ma
= 1000 * 10 = 10000 N
Thus;
Fnet = Force force - Resistance force
Forward force = Fnet + Resistance force
= 10000 + 200
= 10200 N
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The amount of forward force from the engine needed to make the 1000 Kg car accelerate 10 m/s² forward is 10200 N
How do I determine the forward force needed to accelerate the car?First, we shall obtain the net force acting on the 1000 Kg car. Details below:
Mass of car (m) = 1000 KgAcceleration of car (a) = 10 m/s²Net force (F) =?Net force = mass × acceleration
Net force = 1000 × 10
Net force = 10000 N
Finally, we shall obtain the forward force needed to accelerate the car. This is illustrated below:
Net force = 10000 NResistant force = 200 NForward force = ?Net force = Forward force - resistant force
10000 = Forward force - 200
Collect like terma
Forward force = 10000 + 200
Forward force = 10200 N
Thus, the forward force needed is 10200 N
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The temperature of the water was
originally 16.0°C. The specific heat of
water is approximately 4.18 J/g °C.
What is the change in thermal energy?
Assume the mass of the water is 1.00
kg. (Show your work!)
Answer: 4182 J/kg°C
Explanation: molar heat capacity is J/mole C not J/gC. 4.18 J/gC x (18.0 g / mole) = 75.2 J/moleC
Wrongly called for a foul, an angry basketball player throws the ball straight down to the floor.
If the ball bounces straight up and returns to the floor 2.9 s after first striking it, what was the ball's greatest height above the floor?
The ball had a maximum height that was 3.0 meters lower than its initial height (h₀).
How can you determine the ball's greatest height?Before being thrown down, let's call the ball's initial height h0. The ball's height after it was thrown down and bounced back up is called h1.
After being thrown, the ball takes half as long to reach its maximum height (h1) as it does to bounce back to the ground (2.9 s divided by 2 = 1.45 s).
Using the following equation for vertical displacement under gravity's constant acceleration:
y = v₀ × t + (1/2) × a × t²
where:
The initial velocity of the ball, v₀, is negative because it was thrown straight down;
a is the acceleration caused by gravity (9.8 m/s²); and
t is the time it takes for the ball to reach its maximum height (1.45 s).
We can use the equation for velocity under constant acceleration to determine the initial velocity of the ball, v₀ :
v = v₀ + a × t
where:
v is the velocity of the ball at time t (0 m/s since it has reached its maximum height)
Combining the two equations:
0 = v₀ + 9.8 m/s² × 1.45 s
v₀ = -9.8 m/s² × 1.45 s
Substituting the values for v₀ and t into the equation for vertical displacement:
h₁ - h₀ = v₀ × t + (1/2) × a × t²
h₁ - h₀ = (-9.8 m/s² × 1.45 s) × 1.45 s + (1/2) × 9.8 m/s² × (1.45 s)²
h₁ - h₀ = -13.8 m + 10.8 m
h₁ - h₀
= -3.0 m
So, the ball's greatest height above the floor was 3.0 m less than its initial height (h₀).
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If two bowling balls were to collide head on and bounce off one another, with no loss in kinetic energy, the collision would be considered a(n) ___________ collision.
A.Reversable
B.Cushy
C.Perfectly Inelastic
D.Elastic
D. Elastic because that's what an elastic collision is.
