A 2.25

Which of the following methods of generating electricity is the only one that does NOT rely on Faraday's law of electromagnetic induction?

A. Wind turbines

B. Nuclear power plant

C. A conventional fossil fuel power plant, burning coal, oil, or natural gas

D. Solar photovoltaics (solar panels)

E. Hydro-electric power plant

Briefly describe what a wavefunction is. Use the term “boundary condition” in your answer. State 2 properties of wavefunctions. Give 2 examples of physical systems that would be described by wavefunctions.

During launches, rockets often discard unneeded parts. A certain rocket starts from rest on the launch pad and accelerates upward at a steady 3.05 m/s^2 . When it is 260 m above the launch pad, it discards a used fuel canister by simply disconnecting it. Once it is disconnected, the only force acting on the canister is gravity (air resistance can be ignored).

A.   How high is the rocket when the canister hits the launch pad, assuming that the rocket does not change its acceleration?

B. What total distance did the canister travel between its release and its crash onto the launch pad? This includes the distance the canister travels while going up plus the distance it travels while falling back to the ground.

**** Please show work. Thanks!

A mortar* crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action. Angling the mortar at an angle of θ = 57.0o (as shown), the crew fires the shell at a muzzle velocity of 241 feet per second. How far down the hill does the shell strike if the hill subtends an angle φ = 36.0o from the horizontal? (Ignore air friction.)

How long will the mortar shell remain in the air?

How fast will the shell be traveling when it hits the ground?

An extremely small sample of an ideal diatomic gas (with a molar mass of 28 g/mol) has the following distribution of molecular speeds: 1 molecule moving at 100 m/s, 2 molecules at 200 m/s, 4 at 300 m/s, and 3 at 400 m/s.

What is the rms speed of the distribution? What is the average kinetic energy of translational motion per molecule? What is the temperature of this sample?

An insulated Thermos contains 145 g of water at 70.7 ˚C. You put in a 11.0 g ice cube at 0.00 ˚C to form a system of ice + original water. The specific heat of liquid water is 4190 J/kg•K; and the heat of fusion of water is 333 kJ/kg. What is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?

Small charged spheres are arranged as follows:

1. Determine the signs of the charged spheres. Explain.

2. Determine the net electric field (magnitude and direction) at the origin.

3. Using your result from part b, determine the net electric force (magnitude and direction) on a proton initially placed at rest at the origin. If you don't use your result from part b, then you will not get any credit whatsoever on this part.

4. Determine the acceleration (magnitude and direction) of the proton (you may ignore gravity).

5. Could you use the constant-acceleration kinematics equations to predict the subsequent motion of the proton? Explain.

69) A particle with a mass of 400 g movig at 2.0 m/s collides elastically with a stationary particle whose mass is 240 g.

After the collision, the 400 g mass is moving at 1.5 m/s. Through what angle is its path deflected?

The answer is 30. Please show all the work with fomular.

A small solid sphere of mass M₀, of radius R₀, and of uniform density ?₀ is placed in a large bowl containing water. It floats and the level of the water in the dish is L. Given the information below, determine the possible effects on the water level L, (R-Rises, F-Falls, U-Unchanged), when that sphere is replaced by a new solid sphere of uniform density.
Read it to me

R F U R or U F or U R or F or U  The new sphere has radius R = R₀ and density ? < ?₀
R F U R or U F or U R or F or U  The new sphere has density ? = ?₀ and mass M < M₀
R F U R or U F or U R or F or U  The new sphere has density ? > ?₀ and mass M = M₀
R F U R or U F or U R or F or U  The new sphere has radius R > R₀ and density ? < ?₀
R F U R or U F or U R or F or U  The new sphere has mass M > M₀ and density ? = ?₀
R F U R or U F or U R or F or U  The new sphere has density ? < ?₀ and mass M = M₀

Problem 22.29

What magnitude charge creates a 1.70 N/C electric field at a point 4.60 m away? Express your answer with the appropriate units. Thanks ;)

Which one of the following statements is true? Please explain each choice: why it is true/false.

(a) The Burgers vector of an edge dislocation is normal to the dislocation line and normal to the slip plane.

(b) The Burgers vector of a screw dislocation is normal to the dislocation line and parallel to the slip plane.

(c) When a screw dislocation enables slip in a single crystal, the dislocation line remains in the slip plane.

(d) BCC crystals do not contain dislocations.

(e) Fine-grained samples of γ-iron contain fewer dislocations than coarse-grained samples of γ-iron.

In the double-slit experiment of the figure below, the viewing screen is at distance D = 4.00 m, point P lies at distance y = 13.0 cm from the center of the pattern, the slit separation d is 4.50

1) Explain the working of a lightning rod. Don