A student makes a short electromagnet by winding 540 turns of wire around a wooden cylinder of diameter d = 3.2 cm. The coil is connected to a battery producing a current of 4.3 A in the wire. (a) What is the magnitude of the magnetic dipole moment of this device? (b) At what axial distance z >> d will the magnetic field have the magnitude 5.0 µT (approximately one-tenth that of Earth's magnetic field)?

1# What is the conservation of momentum? Under what conditions is it true?

During the upcoming lab you will work as a class to test predictions as to when momentum is and is not conserved when you collide two gliders. You will have available gliders with different masses and different things you can mount on the end of gliders to interact (including springs, Velcro, magnets). Please identify at least a four different scenarios you could test that span a range of different conditions, including at least one in which you expect total momentum to be conserved and at least one in which you DO NOT expect total momentum to be conserved

2# in the upcoming lab, it will be useful to program Lab Assistant to make graphs of the momentum of each glider and the entire system. In the space below, please make a list of the

·         sensors you will need to set up,

·         derived waveforms and constants you will need to define, and

·         the formulas you will need to enter (including the actual equations)

3#Look over the example lab reports, particularly the abstract. What is the purpose of an abstract? What information is included in it? What information is not included in it? How does it differ from the introduction section?

Based upon the equation for potential energy, how does the potential energy change when the gravity is lower than it is on Earth

Example... gravity on the moon is 1.6 m/s2

Describe any differences you see in potential and kinetic energy between the Earth and Jupiter.

Describe any differences you see in potential and kinetic energy between the Earth and the moon.

Astronomers can measure the temperature of a star by comparing its brightness in blue and yellow light. Does reddening by interstellar dust affect a star's temperature measurement, and if so, how?

A 25-gram block is resting on a horizontal, frictionless surface and is attached to a horizontal spring of k = 210 N/m. The spring is stretched so that the block is 27 cm away from the spring’s equilibrium position and released from rest.

a) What is the velocity of the block when it passes through the equilibrium point?

b) At what distance from equilibrium is the spring’s potential energy equal to the block’s kinetic energy?

c) Suppose the block has a speed of 21 m/s when it passes through the equilibrium point for the first time, how much work is done by the force of kinetic friction during that first part of the block’s motion?

Group Work 3 – GI Joe (option 2)

G. I. Joe paratrooper Ripcord (80 kg) is invading Cobra HQ. He’s brought in by a stealth bomber, where he jumps from an altitude of 10,000 ft (approx 3000 meters).

What is his initial acceleration?

If the chute failed, what would his average acceleration be over the trip? Assuming the average acceleration, how fast would he hit the ground?

Derive an equation for the ratio of terminal velocities between diving head first vs. spread eagle (lying flat).

At 1,000 ft, he pulls the parachute cord (a 1m x 5m rectangular chute). What is his initial acceleration due to drag?

How long does it take to reach the ground at Cobra HQ if the parachute opens at 1,000 ft?

Young softball batters are often instructed to “choke-up on the bat” by their coach. In terms of the moment of inertia, what exactly does this accomplish and why is it an advantage to the young batter? Come up with one other real-life example where either increasing or decreasing the moment of inertia becomes an advantage? Clearly describe the example and talk about the variables involved.

A person standing on the edge of a high cliff
throws a rock straight up with an initial
velocity of 17.50 m/s. The rock misses the edge
of the cliff as it falls back to Earth. What is the
position and velocity of the rock at 1.00 s, 3.5 s
and 4.0 s after it is thrown, neglecting the
effects of air resistance.

1.       Prepare an explanation of the nonconserved work of pulling and friction forces. Observe what happens when you rub your hands together quickly. Also, observe what happens when you hold a heavy book out to your side for as long as you can. What form do you think the friction and muscle work would take?

1) Define white privilege (McIntosh reading). Give three examples of white privilege. Do you know people who have experienced this? From what perspective?

To the Chegg Personel,
I need help, I'm waiting for the answers to my questions. This is the third time that I have asked for the same question and no one has answered yet my question. I need the answer as soon as possible please.

SIMPLE PENDULUM

1. What are the factors affecting the period of a simple pendulum?

1.1. What must you do to the length of a simple pendulum so that its period is doubled?

1.2. Determine the acceleration due to gravity in a location where a simple pendulum is 150.0 cm long makes 100 vibrations in 246 s.

1.3 What can you conclude from the graph? (Chegg on my laptop wouldn't let me upload so I've attached the link) - http://tinypic.com/r/j6o5qq/9​

Express the following angles in radians: (a) 30.0°, (b) 45.0°, (c) 60.0°, (d) 180.0°, and (e) 390°. Give as numerical values AND as fraction of π.

Mickey, a daredevil mouse of mass 0.0215 kg , is attempting to become the world's first "mouse cannonball." He is loaded into a spring-powered gun pointing up at some angle and is shot into the air. The gun's spring has a force constant of 60.9 N/m and is initially compressed a distance of 0.137 m from its relaxed position. If Mickey has a constant horizontal speed of 2.35 m/s while he is flying through the air, how high above his initial location in the gun does Mickey soar? Assume ?=9.81 m/s2 .

Explain the thermodynamic principle of a geothermal heat pump.