Consider a sample of ideal gas (0.50 moles) confined in a piston assembly that has diathermal walls (i.e. the walls allow heat exchange). The assembly is in contact with a thermal reservoir that holds the temperature constant at 300.K.

a) Suppose the ideal gas undergoes reversible isothermal compression from 25.0 L to 10.0 L. Calculate ΔS, ΔSsurrounding, and ΔStotal, where total = universe.

b) Suppose the ideal gas had instead been compressed isothermally by an external constant pressure from 25.0 L to 10.0 L. First determine the value of the minimum constant pressure for this process (in Pascals). Then, calculate ΔS, ΔSsurrounding, and ΔStotal.

Provide a diagram for each situation. A 45kg woman is riding on an elevator. What are her net force, force of gravity, and normal force for her when:

1) The elevator is stationary on the 20th floor of a building

2) The elevator has a downward acceleration with a magnitude of 1.5 meters per second squared.

3) The elevator has a constant downward velocity of 3 meters per second.

4) The elevator accelerates upward with a magnitude of 1.5 meters per second squared to stop at the 5th floor

5) The elevator cable suddenly breaks and the elevator undergoes free fall/

what do nuclear technology and physics share in common? (please answer in depth)

3. A cubical Gaussian surface encloses a net charge. Each edge of the cube has length 4.0 m. The cube is drawn such that four of its six faces are parallel to the z direction. The net electric field is such that the electric field lines skim each of these four faces. On the top face, the electric field ?⃗⃗ ? = +25?̂ N/C and on the other face ?⃗⃗ ? = −40?̂ N/C. Sketch the cubical Gaussian surface, indicating the z direction, ?⃗⃗ ? and ?⃗⃗

a. Determine the net charge the Gaussian surface encloses. b) Would any of your calculations be affected if you used a spherical Gaussian surface instead of a cubical one? Justify your answer.

A stretched string fixed at each end has a mass of 43.0 g and a length of 7.20 m. The tension in the string is 47.0 N. (a) Determine the positions of the nodes and antinodes for the third harmonic. (Answer from smallest to largest distance from one end of the string.)

nodes

______m

______m

______m

______m

antinodes

______m

______m

______m

(b) What is the vibration frequency for this harmonic? Hz

1. Boltzmann statistics predict the probability that atoms or particles will be at the level of
The energy E (s) is equal to P (s) where
P (s) = e ^ −E (s) ⁄kT / Z
Where Z is the Partition function and Z = ∑ e ^ −E (s) ⁄kT

1.1 One hypothetical particle has 3 energy levels, -0.05 eV, 0 eV and 0.05 eV. Write a graph between Z and kT and
Describe the graph (Recommended: Use programs like Mathematica)
1.2 If the particle is in balance with the environment (Reservoir) at 300 K, find the probability that the particle will be at the energy level
all three
1.3 If the particle is in balance with the environment (Reservoir) at 1000 K, find the probability that the particle will be at the energy level
All three compare with the result in item 1.2.

discuss the terrestrial /gas giant distinctions based on their rotation speeds,oblateness and magnetic fields?

In your garden, you have a hose with a radius of 3 cm connected to a sprinkler with twelve openings, each of which has a radius of 0.2 cm. The sprinkler openings are aimed 25• above the horizon, and the water travels a distance of 4 m before hitting your flowers.

a) What is the exit velocity at the sprinkler openings?

b) What is the flow rate of the sprinkler?

c) What must the water pressure in the hose be?

(a) Explain the features of the spectra of alpha, beta and gamma radiation.

(b) Why does alpha/beta spectroscopy have to be conducted in an environment different from that for gamma spectroscopy?

How does a polarizing filter work? After passing through a polarizing filter that is aligned vertically, how are the electric and magnetic fields of the EM waves aligned? If you wished to block the light completely, how would you align a second polarizing filter that was placed directly behind the first?

what is the one way light time from moon to earth, calculate with general relativity effect.

Please explain each step.

Two point charges totaling 9.50 μC exert a repulsive force of 0.160 N on one another when separated by 0.420 m. a) What is the charge on each? Assume that the two charges are negative. b)What is the charge on each if the force is attractive?

If an object of mass m1 = 0.55 kg is sliding without friction in the +x-direction on a level surface at a speed of v1 = 0.72 m/s and it collides with a stationary object of mass m1 = 0.55 kg, determine the total initial and final momenta (before and after the collision) as well as the total initial and final Mechanical Energy (before and after the collision) for;

1) a perfectly elastic collision, and

2) a perfectly inelastic collision

Energy losses during an energy transformation process can be quantified as the efficiency;

e=useful energy out total energy in x 100%

3) State what the useful energies in and out are and then calculate the efficiency for the perfectly elastic and the efficiency for the perfectly inelastic collisions described above.

A) Three identical very dense masses of 5000kg each are placed on the x axis. One mass is at x1 = -130cm , one is at the origin, and one is at x2 = 400 cm.

1) What is the magnitude of the net gravitational force Fgrav on the mass at the origin due to the other two masses? Take the gravitational constant to be G = 6.67×10⁻¹¹ N⋅m2/kg2N. Express your answer in newtons to three significant figures.

2) What is the direction of the net gravitational force on the mass at the origin due to the other two masses?

B) The space shuttle releases a satellite into a circular orbit 545km above the Earth.

1) How fast must the shuttle be moving (relative to Earth) when the release occurs?

point charge +Q at origin and two infinite ground planes at z= +- d. used method of images to find

a)electric potential in region |z| =< d

b)induced surface charge density on the plates