in 0.550 s, an 8.00-kg block is pulled through a distance of 3.00 m on a horizontal frictionless surface, starting from rest. the block has a constant acceleration and is pulled by means of a horizontal spring that is attached to the block. the spring has a spring constant of 545 n/m. by how much does the spring stretch as the block is being pulled?

The kangaroo's horizontal speed will be 9.7 m/s and its departure speed will indeed be 10.65 m/s.

By observing the pace at which this compressed region moves through the medium, we may determine the sound speed. The sound wave travels at a speed of around 343 meters per second in low humidity at 20 degrees Celsius.

The following equation relates the distance to the direction and initial velocity:

d = [v₀²sin2θ]/g, where θ – the angle of the jump.

Thus, v₀² = gd / (sin2θ) = (9.8×8)/0.69 = 113.62

v₀ = 10.65 m/s ( the take off speed).

The horizontal velocity equals:

vₓ = v₀cos 22° = 10.65 m/s × 0.92 = 9.7 m/s

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Answer:

12 pounds mine does

Explanation:

Answer: 10 pnds

Explanation:

The top: Deposition, compaction, and cementation. The right: The heat and pressure.

The bottom Right: Melting.

The bottom left: Cooling.

The top left: Weathering and erosion.

Given what we know, we can confirm that as Halley's comet moves closer to the sun, we can expect its potential energy to be near its maximum.

We can conclude that its potential energy will increase as it comes closer to the sun, and will reach its maximum at the closest point to the sun. This is because the potential energy of an object is directly proportional to the force of gravity acting on that object. As Halley's comet approaches the sun, the sun's gravitational pull on the comet is stronger, and thus, its potential energy increases.

Therefore, given the relationship between gravity and potential energy, we can confirm that s Halley's comet moves closer to the sun, we can expect its potential energy to increase and be near its maximum.

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Answer: It's B, They must point in the same direction and have the same magnitude.

Explanation: I hope it's right.

They must point in opposite directions and have the same magnitude. The correct answer is A.

When a particle decays into two particles, the total momentum of the system must be conserved. This means that the sum of the momenta of the two particles must be equal to the original particle's momentum. Since the original particle was at rest, its momentum was zero. Therefore, the sum of the momenta of the two particles must also be zero.
In order for the sum of the momenta to be zero, the two particles must have momenta that are equal in magnitude but opposite in direction. This is because the moment will cancel out when added together, resulting in a sum of zero.
Therefore, the correct answer is A. They must point in opposite directions and have the same magnitude.

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radio waves,X-rays,

Explanation:

In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves. Microwaves (like the ones used in microwave ovens) are a subsection of the radio wave segment of the EM spectrum.

The formula for calculating the orbital speed of the eqrth as it orbits the sun is expressed as

Where

G is the gravitational constant whose value is 6.673 x 10^- 11 Nm^2/kg^2

M is the mass of the central body about which the satelite orbits

R is the ardius of orbit of the satelite

From the information given,

M = 1.99 x 10^30 kg

R = 1.496 x 10^11

By substituting these values into the formula, we have

The orbital speed of the Earth, in m/s, as it orbits the Sun is 29793.48 m/s

Answer:

A⋅24=24A

12=24A

10=24A

a⋅(60V)⋅(50Hz)=3000aVHz

Explanation:

Answer: A room lined with soft materials that absorb sound.

Explanation:

Just did it :))

This illustrates the phenomenon of electrostatic force.

Moreover, The electrostatic force is responsible for the attraction between the ball and the wall. When we rub the balloon with a synthetic substance, it becomes charged, and when we bring the balloon closer to the wall, it is attracted to the uncharged wall due to the electrostatic force.

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Explanation:

The electric force is:

F = k q₁ q₂ / r²

F = (9×10⁹ Nm²/C²) (-1.6×10⁻¹⁹ C) (+1.6×10⁻¹⁹ C) / (6.5×10⁻¹¹ m)²

F = 5.4×10⁻⁸ N

The gravitational force is:

F = G m₁ m₂ / r²

F = (6.67×10⁻¹¹ Nm²/kg²) (9.11×10⁻³¹ kg) (1.67×10⁻²⁷ kg) / (6.5×10⁻¹¹ m)²

F = 2.40×10⁻⁴⁷ N

Explanation:

x = 16.7 m

v₀ = 2.75 m/s

t = 8.90 s

Find: v

x = ½ (v + v₀) t

16.7 m = ½ (v + 2.75 m/s) (8.90 s)

v = 1.00 m/s

Answer:

Explanation:

If generator really means alternator as used in cars, the following can be said:

The rotor is fed with a variable voltage ranging from 0 volt to 12 volts. The 2 brushes (fixed, not rotating, like the stator) make contact with two rings that are rotating with the rotor. The rotor acts like a fixed magnet, but the magnetic field strength is constantly updated to provide a constant output voltage, even if the load current change or the motor speed change.

The stator is basically 3 coils and 6 diodes that convert the 3 phases of AC output to an almost ripple-free DC.

Note that as more energy is extracted from the alternator (for example, adding 10 amps by turning on the headlights) the shaft resists more rotation. This can be easily tested by holding an alternator in your hand, and trying to rotate the shaft by hand with no load (rotate easily, keep rotating for a few seconds), then short-circuiting the output (much harder to rotate, stop rotating immediately). The quest for magical perpetual energy where a motor is powered by an alternator is a child's dream.

Answer:

The approximate mass of the object is. 1. 0.01 kg.

Explanation:

between the magnitude of the gravitational force exerted on Earth by the ... A 60-kg physics student would weigh 1560 N on the surface of planet X.

Answer:

Option B

"Packets" of electromagnetic energy eject electrons.

Explanation:

A photon is a tiny packet of light. Light as we know is a form of electromagnetic energy. Whenever light is incident on a photoelectric surface, the energy of the light wave gets transferred to the electron, causing it to have enough energy to eject electrons from its surface. The electrons, once ejected, are now free to move about, thus, resulting in the flow of electrical current.

This makes option B the correct answer

The voltage of the circuit is 13 - 8j volts.

The circuit has a current of 5 + j^3 amps, which can be written as 5 + 3j + j^2.

The resistance is 3 - j^2 ohms, which can be written as 3 - 2j + j^2. The voltage of the circuit is calculated by multiplying the current by the resistance.

In this case, the voltage is 5 * 3 - 5j + 3j^2 - 2j^3 + j^4.

The imaginary unit j is defined as the square root of -1.

This means that j^2 = -1 and j^3 = -j.

Substituting these values into the expression for the voltage, we get 15 - 7j + j^2 - j^3 + j^4.

Simplifying the expression, we get 15 - 7j + 1 - j - 1 = 13 - 8j.

Therefore, the voltage of the circuit is 13 - 8j volts.

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With the given information on Marcia who is an electrical engineer who is testing the voltage of a circuit, the voltage of the circuit is 12 - 7j volts.

The voltage of the circuit is given as

voltage = (current) x (resistance)

First, multiply the complex current and resistance values together using the distributive law and the fact that the square of the imaginary unit j is -1.

(current) x (resistance) = (5+j3) x (3-j2)

= 5 x 3 + 5 x (-j2) + j3 x 3 + j3 x (-j2)

= 15 - j10 + 3j - 3

Simplify this expression, we get:

(5+j3) x (3-j2) = 12 - 7j

Plug this value into the voltage formula

voltage = (current) x (resistance) = (12 - 7j) volts

Therefore, the voltage of the circuit is 12 - 7j volts.

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Question is incomplete, find the complete question below

Marcia is an electrical engineer who is testing the voltage of a circuit given a certain current and resistance. She uses the following formula to calculate voltage: voltage = (current) (resistance) The circuit she tests has a current of5+j3 amps and a resistance of3-j2 ohms. What is the voltage of the circuit? 0 1 1 +Jl volts 0 21 +.l volts 0 21 'Jl volts 0 11—.lvolts

The speed of the projectile when it strikes the ground below is approximately 620.6 m/s.

We can use the kinematic equations of motion to solve this problem.

First, we can find the time it takes for the projectile to hit the ground using the vertical motion equation:

y = vi*t + (1/2)at²

where y is the vertical displacement (in this case, the initial height of the cliff), vi is the initial vertical velocity (in this case, zero), a is the acceleration due to gravity (-9.8 m/s^2), and t is time.

Plugging in the values, we get:

265 m = 0t + (1/2)(-9.8 m/s²)*t²

Solving for t, we get:

t = √((2*265 m) / (9.8 m/s²)) = 8.25 s

Next, we can find the horizontal displacement of the projectile using the horizontal motion equation:

x = v*t

where x is the horizontal displacement, v is the initial horizontal velocity, and t is time.

Since the initial velocity is at a 45-degree angle, we can break it down into its horizontal and vertical components:

v_initial_x = v_initial*cos(45 degrees) = 350 m/s * cos(45 degrees) = 247.5 m/s

v_initial_y = v_initial*sin(45 degrees) = 350 m/s * sin(45 degrees) = 247.5 m/s

The horizontal displacement can now be calculated as:

x = v_initial_x * t = 247.5 m/s * 8.25 s = 2041.9 m

Finally, we can find the speed of the projectile when it hits the ground using the total velocity equation:

v_final² = v_initial_x² + v_initial_y² + 2ay

where v_final is the final velocity, v_initial_x and v_initial_y are the horizontal and vertical components of the initial velocity, and y is the vertical displacement.

Plugging in the values, we get:

v_final² = (247.5 m/s)² + (350 m/s)² + 2*(-9.8 m/s²)*(265 m)

Solving for v_final, we get:

v_final = √((247.5 m/s)² + (350 m/s)² + 2*(-9.8 m/s²)*(265 m)) = 620.6 m/s

Therefore, the speed of the projectile when it strikes the ground below is approximately 620.6 m/s.

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The statement "The shape of the free surface of a liquid in a rotating container is a hyperbola:" is false because this shape is referred to as the "parabolic surface of revolution" or the "parabolic dish."

The curvature of the parabolic surface results from the balance between the centrifugal force and the gravitational force acting on the liquid. As the container rotates, the centrifugal force pushes the liquid outward, causing it to rise along the sides of the container.

At the same time, the gravitational force pulls the liquid downward, flattening the surface at the bottom of the container. The resulting shape is a parabola, with a flat bottom and a curved surface that rises toward the edges of the container. This phenomenon is observed in many practical applications, such as centrifuges, washing machines, and amusement park rides.

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Answer: Rotational motion

Explanation: The two types of motion of the rolling ball are translational motion and rotational motion. The center of mass of the ball undergoes translational motion whereas the ball undergoes rotational motion in the center of mass frame.

The distance from the axis of the force applied is 2.05 m.

The distance from the axis of the force applied is calculated as follows;

The formula for torque;

τ = Fr

where;

Another formula for torque is given as;

τ = Iα

where;

τ = (mr²)α

τ = (25 kg x (0.925 m)²) x (1.84 rad/s²)

τ = 39.36 Nm

The distance is calculated as;

r = τ/F

r = ( 39.36 Nm ) / (19.2 N)

r = 2.05 m

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The circus stilt walker is in unstable equilibrium as he balances on one stilt.

This means that any slight disturbance or change in the system could cause him to lose his balance and fall. However, the stilt walker is trained to maintain his position and prevent any such disturbance. Stable equilibrium, on the other hand, refers to a system that returns to its original position after a disturbance. Neutral equilibrium is when a system is indifferent to any disturbance and does not move.

Universal equilibrium refers to the state of balance in the entire universe, where all forces are balanced and there is no net movement or change. In the case of the stilt walker, he is in a state of unstable equilibrium but is skilled enough to maintain his balance and prevent any disturbance.

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Answer:

Here u go

Explanation:

Mass of air in the room m= volume of room×density of air

=(5m×4m×3m)(1.20kgm3)=72kg

Weight of air, W=mg=(72kg)(9.8ms2)=706N.

Answer:

person above is correct, i did the work and got the smae answer

Answer:

The mineral's hardness is greater than 4 but less than 5.5 on the Mohs hardness scale.

Answer:

4.489 m/s

Explanation:

We are given;

Length of rod;L = 51.4 cm = 0.514 m

When the ball is at the top end, it's velocity will be zero and it's kinetic energy will be transformed to potential energy.

Thus; ½mv² = mgh

m will cancel out to give;

v² = 2gh

Where:

g is acceleration due to gravity = 9.8 m/s²

h is the maximum height of the ball which is equal to twice the length of the rod.

Thus, h = 2(0.514) = 1.028 m

v² = 2 × 9.8 × 1.028

v = √20.1488

v = 4.489 m/s

The car can travel 220.27 ft in 4.61 s of time.

Given that a sports car accelerates from a standing start to 65 mi/hr.

So the initial velocity = 0 ft/s

The final velocity = 65 mi/hr.

We convert the final velocity from mi/hr. to ft/s.

1 mi/hr = 5280/3600 ft/s

          = 1.47 ft/s

Therefore final velocity = 65 x 1.47 = 95.55 ft/s

The time taken by the car = 4.61 s

Now the average acceleration of the car = final velocity - initial velocity / time taken = 95.55 - 0/ 4.61 s = 20.73 \(ft/s^2\)

The displacement of the car , \(s= ut +\frac{1}{2} at^2\) ,

where u is the initial velocity of the car, t, the time taken by the car and a, the average acceleration.

So, displacement = 0 x 4.61 + 1/2 x 20.73 x \(4.61^2\)

                             = 220.27 ft

Hence the distance travelled by the sports car in 4.61s is 220.27 ft.

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From the calculation, we can conclude that both race car A and B have the same magnitude of velocity but accelerate at different magnitude

VELOCITY AND ACCELERATION

The rate of change of displacement is called Velocity. While acceleration is the rate of change of velocity.

Given that  a race Car A accelerates on a straight track from 0 to 100 kilometers/second in 6 seconds.

Since acceleration = \(\frac{Change in velocity}{time taken} \)

a = 1000(100 - 0)/6

a = 100000/6

a = 16666.67 m/\(s^{2} \)

And race Car B accelerates on a straight track from 0 to 100 kilometers/second in 5 seconds.

acceleration =  \(\frac{Change in velocity}{time taken} \)

a = 1000(100 - 0)/5

a = 100000/5

a = 20000 m/\(s^{2} \)

From the calculation above, we can conclude that both race car A and B have the same magnitude of velocity but accelerate at different magnitude.

Race car A accelerates at 16666.67 m/\(s^{2} \), while race car B accelerates at 20000 m/\(s^{2} \)

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Given C = {φ, {φ}, {{φ}}}, count all the subsets of C :

• { } (empty set)

• {φ}; {{φ}}; {{{φ}}} (all subsets containing only 1 element)

• {φ, {φ}}; {φ, {{φ}}}; {{φ}, {{φ}}} (all subsets containing only 2 elements)

• {φ, {φ}, {{φ}}} (the set C itself)

Then the power set of C is

P(C) = {{ }, {φ}, {{φ}}, {{{φ}}}, {φ, {φ}}, {φ, {{φ}}}, {{φ}, {{φ}}}, {φ, {φ}, {{φ}}}}

In case that answer is unclear because of all those curly braces, we can let φ' = {φ} and φ'' = {{φ}}, and denote the empty set by ∅. Then

C = {φ, φ', φ''}

and

P(C) = {∅, {φ}, {φ'}, {φ''}, {φ, φ'}, {φ, φ''}, {φ', φ''}, {φ, φ', φ''}}

Answer:

Below

Explanation:

CO2 buildup during exercise stimulates respiration