A satellite is in a circular orbit about the earth (ME = 5.98 X10^24 kg). The period of the satellite is 1.40X10^4 s. What is the speed at which the satellite travels?

A transverse harmonic wave travels on a rope according to the following expression: y(x,t) = 0.17sin(2.8x + 17.3t) The mass density of the rope is μ = 0.107 kg/m. x and y are measured in meters and t in seconds.

1)

What is the tension in the rope?

2)

At x = 3.5 m and t = 0.4 s, what is the velocity of the rope? (watch your sign)

3)

At x = 3.5 m and t = 0.4 s, what is the acceleration of the rope? (watch your sign)

4)

What is the average speed of the rope during one complete oscillation of the rope?

5)

In what direction is the wave traveling?

6)

On the same rope, how would increasing the wavelength of the wave change the period of oscillation?

Consider the situation where one IOLab device rolls into another stationary IOlab device and they stick together and they roll off together. When answering the following questions, answer them specifically for this situation.

How could you calculate the total momentum before the collision?      

How could you calculate the total momentum after the collision?      

How could you calculate the total kinetic energy before the collision?      

How could you calculate the total kinetic energy after the collision?      

(Extra information: the IOLab device can generate both Force/Time graphs and Velocity/ Time graphs)

A 58.0 kg bungee jumper is standing on a tall platform (ho = 46.0 m) as shown in the diagram. The bungee cord has an unstrained length of Lo = 9.00 m, and when stretched, behaves like an ideal spring with a spring constant of k = 61.0 N/m. The jumper falls from rest, and the only forces acting on him are gravity and, for the latter part of the descent, the elastic force of the bungee cord. What is his speed when he is at the following heights above the water? (a) hA = 37.0 m and (b) hB = 15.0 m? Ignore the mass of the bungee cord.

a photon beam is made from a target with a high impedance. electron beams of 6 and 16Mev are used in the process, shot at the target. the ratio of beam intensity is measured in the direction of the electron beam (0 degrees) and at 25 degrees from the angle of incidence.nFor what electron bean energy (and why) is the ratio of intensities (i₀/i₂₅) the largest?

Calculate the frequency of the photon emitted when the electron jumps from the n = 3 to the n = 2 energy level.

Modern International Maritime Organization (IMO) regulations specify that ships longer than 200 m must have a ship's whistle whose frequency is between 70 and 192 Hz. Suppose that a 235-m ship has a whistle whose frequency is 187 Hz. If the ship is stationary, what is the maximum speed that an approaching observer can have so that the ship's whistle still satisfies IMO regulations?

Two trains are traveling on the same track and in the same direction. The first train is moving at a speed of 37.2 m/s and blows its horn, whose frequency is 255 Hz. The second train, which is behind the first, detects a frequency of 238 Hz. What is the speed of the second train?

Two trains are traveling on the same track and in the same direction. The first train, which is behind the second train, blows a horn whose frequency is 265 Hz. The second train detects a frequency of 284 Hz. If the speed of the second train is 14.0 m/s, what is the speed of the first train?

READING 2 The eardrum is displaced surprisingly little when a sound wave strikes it. Some idea of the displacement of the eardrum by a sound wave can be obtained by using Equation 7.1: Equation for wave energy The displacement amplitude, A, of the air molecules gives us a lower limit to the displacement of the eardrum.

At the threshold of hearing at 3.4 kHz, the sound intensity is about 10−12W/m2. The threshold of pain begins at an intensity of 1.0W/m2 (19).

What is the amplitude of eardrum vibrations at these intensities?

The density of air is 1.3kg/m3. The speed of sound is 331m/s.

Please write your answers with one decimal places.

(________________10^−3 nm (at threshold of hearing) (This value is ~ 3/100 the diameter of a hydrogen atom!)

________________10^3 nm (at threshold of pain)

I believe the answer to the first question is 3.19 x to^-3 nm

Describe magnetic inductance and give examples.

Describe R-L, L-C, and L-R-C series circuits, and give examples.

( NOT by hand)

1. The Phenomenon
A toy car launcher works as follows:

There is a compressible spring that is attached to a horizontal rail, on which a toy car can roll. The toy car can be pushed back against the spring, compressing it a certain distance. There is a little hook that holds the car against the compressed spring. When the hook is released, the spring pushes the car out of the launcher, down the horizontal track.

We want to ask some questions and make some predictions about different cars as they come out of the launcher. Upon close examination of this launcher, it is noted that the
spring is always compressed the same amount each time a car is loaded into the launcher.
The spring stays put inside the launcher as the car is pushed out.
2. What we want to know or predict

• Do all cars come out of the launcher with the same KE?
• Do all cars come out of the launcher with the same speed?
• If they don’t all have the same speed when they come out, what parameters cause the difference?
• What do we need to do to get our car to have a higher speed than our friend’s cars?

3. Create a Particular Model and use it to answer the questions
Plan what you need to do in your group and how you will proceed. Be systematic.
4. Suggestions:
• Use the Energy-Interaction Model and the Spring-Mass Model.
• Consider what energy systems are involved.
• Note: The car is in contact with the spring while it is compressed and separates
from the spring just as the spring reaches its equilibrium length. During the time
that the car and spring are together, they behave as a spring-mass system.
• To simplify the notation, use “d” for the distance the spring is compressed instead
of “∆x”.

HINT! Chose an interval that includes the moment when the spring and car are moving the fastest.

A box of mass m₁ = 2.0 kg starts from rest and slides down the frictionless incline. At point A, the box encounters a (massless) spring of spring constant k. It compresses the spring a distance x = 0.25 m to point B where the speed of the box is 4.4 m/s. The first box is then removed and a second box of mass m₂ = 3.0 kg is placed on the same incline at the same initial point and let go from rest. At the same point B, the velocity of the second box is found to be 5.6 m/s. Find

(a) the vertical height h that both boxes slid through before reaching point B,

(b) the spring constant, k.

can you write about Newton's laws of motions in term paper at least three pages

An electron with a speed of 4.28

A rocket ship, with mass m=20,000kg, and engines mounted perpendicularly in the x and y directions, fires both rockets simultaneously. The engine oriented in the x-direction fires for 3s and shuts off. The engine oriented in the y-direction fires for 7s and shuts off. The force from the engine in the x-direction is 50,000N and the force from the engine in the y-direction is 100,000N. Make a scatter plot of the y-position of each particle as a function of the x-position, showing the trajectory of the rocket. Use Excel to determine the following: i) While the engines are firing, what is the acceleration of the rocket in the x and y directions? ii) After 7s, what is the velocity of the rocket in the x and y directions? iii) After 7s, what is the speed of the rocket? iv) After 7s, how far has the rocket travelled in the x-direction? How far has it travelled in the y-direction?, After 10 s? v) After 7s, what is the displacement of the rocket? After 10 s? Is the displacement of the rocket the same as the distance travelled? Explain. vi) If the mass of the rocket is doubled, what happens to the displacement? Mass (kg) Fx (N) Fy (N) ax (m/s2) ay (m/s2) 20000 50000 100000 time (s) vx(m/s) vy(m/s) v(m/s) x(m) y(m) d (m) 0 0.5 1

Currently I am working with Pull up and pull down registers and trying to understand what does it mean? But could not able to understand. I searched in Wikipedia but still confused.