Is it possible to transfer heat from a hot reservoir to a cold reservoir?
A) Theoretically yes, but it hasn't been accomplished yet.
B) No; this is forbidden by the second law of thermodynamics.
C) Yes; this will happen naturally.
D) Yes, but work will have to be done.
C
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A 2.00 kg pendulum bob on a string 2.00 m long, is released with a velocity of 1.50 m/s when the support string makes an angle of 30.0 degrees with the vertical. What is the tangential acceleration of the bob at the highest point of its motion?
A. 5.33 
B. 5.77
C. 6.25
D. 7.00
E. 7.25
A particle (mass = 4.0 g, charge = 80 mC) moves in a region of space where the electric field is uniform and is given by Ex = ?2.5 N/C, Ey = Ez = 0 . If the velocity of the particle at t = 0 is given by vx = 80 m/s, vy = vz = 0, what is the speed of the particle at t = 2.0 s?
a. 40 m/s b. 20 m/s c. 60 m/s d. 80 m/s e. 180 m/s
What happens when the air is saturated?
A) The condensation rate equals the evaporation rate. B) The air is at its water vapor capacity. C) Relative humidity is 100%. D) The air temperature equals the dew point temperature. E) all of the above
The magnetic field of a plane-polarized electromagnetic wave moving in the z-direction is given by 
in SI units. What is the wavelength of the EM wave?
A. 120 m B. 240 m C. 60 m D. 100 m E. 360 m