Find an example of a reverse salient from the past 75 years.

Describe the full system that contains the reverse salient, the reverse salient itself, explaining why it was a reverse salient, and the technological advance that made the reverse salient obsolete in the system.

Note: If the reverse salient is still a problem, describe the work being done to overcome the problem.

Explain the continuity equation for electric current and how does divergence apply for electric current? What is the relaxation time of a material?

Imagine two carts with different masses colliding (m1 = 2.0 kg, m2 = 1.0 kg). If cart one is initially moving at 10 m/s and the other cart is stationary, calculate the final speed of each mass after they have a 100% elastic collision. Please show all work!

Show the cleavages and permissible transitions of the sodium atom D₁( ²P_1/2 ---> ²S_1/2 ) and D₂ ( ²P_3/2 ---> ²S_1/2 ) lines in a strong ( B_out > B_in ) magnetic field in the energy diagram.

What is the image distance when d0 =10.11 cm, f = 3.0 cm, di = ?

. Write down the lens formula (1/f = 1/o + 1/i)

. What happens in the simulation experiment when you change the focal length?

. What happens to the image if you change the object distance?

Describe the ray tracing - light tracing for the following:

. A Refracting telescope

. A Reflecting telescope

. A pair of binoculars. Porro Prism and Roof Prism binoculars.

. A microscope

. What happens to the image if you change the object size?

. Write down the Lens Maker's equation and explain

1/f = (n - 1 ) ( 1/R1 - 1/R2)

Explain the strengths and weaknesses of the Bohr model.

1. Show three possible 3p → 2s (6x1014 s^-1 frequency) transition for each case of including spin in strong magnetic field and not including spin in strong magnetic field.
2. If µB = 0,4 eV, find the frequency of transition from 3p (m₁,m₂) = (1,1/2) to 2s (m₁,m₂) = (0, 1/2) in previous question’s transition.

A gas undergoes an isothermal expansion from V1=1.4L followed by isobaric compression, p=cst. if p1=4.4atm, p2=2.2atm→?Nm2, calculate the total work done by the gas.
Hint:
W=∫dW=∫pdV=∫nRTVdV

Assume Silicon (bandgap 1.12 eV) at room temperature (300 K) with the Fermi level located exactly in the middle of the bandgap. Answer the following questions.

a) What is the probability that a state located at the bottom of the conduction band is filled?

b) What is the probability that a state located at the top of the valence band is empty?

1. An explanation of the relevant symmetry.

2. An explanation of your choice of the Gaussian surface and how that choice arises out of the symmetry of the charge distribution.

3. A calculation along with a neat figure showing the charge distribution, the Gaussian surface, and the electric field vector and the area vector for a general area element.

which of the following correctly reflect ways in which a chemical equilibrum can be shifted? changing the temperature of the system, changing the concentration of reactants or products, changing the pressure of a gaseous reactants, changing the volume of a container for an aqueous reaction

For each of the following, put "A" if it is always true, "S" if it is sometimes true, or "N" if it is never true.

(a) The net force on an object is zero if its speed remains constant.

(b) Normal force cannot do work on any system.

(c) If mechanical energy is not conserved, friction is the reason.

(d) A person riding a ferris wheel will feel heaviest at the bottom.

(e) If a moving object changes direction, a net force must act on it.

(f) The terminal velocity of a 25 kg object is higher than that of a 10 kg object.

A Constant – Volume gas thermometer is at 55 kPa pressure at the triple point of water.    By how much does its pressure change for each Kelvin temperature change? (d) The Temperature of a constant-pressure gas thermometer is directly proportional to the gas volume.    If the volume is 1.00 L at the triple point of water, what is it at water’s normal boiling point?