Invented the modern spectroscope

A pair of parallel plates, forming a capacitor, are charged. The plates are pulled apart to quintuple the original separation, the charges on the plates remaining the same. What is the ratio of the final energy stored to the original energy stored?

a. 25 b. 5 c. 1 d. 1/5 e. 1/25

First Law of Thermodynamics: A cyclic process is carried out on an ideal gas such that it returns to its initial state at the end of a cycle, as shown in the pV diagram in the figure. If the process is carried out in a clockwise sense around the enclosed area, as shown on the figure, then the change of internal energy over the full cycle

A. is positive. B. is negative. C. is zero. D. cannot be determined from the information given.

A beam of light that is parallel to the principal axis strikes a convex mirror. What happens to the reflected beam of light?

A) It also is parallel to the principal axis. B) It is perpendicular to the principal axis. C) It appears to be coming from the focal point on the other side of the mirror. D) It appears to be coming from the center of curvature of the mirror. E) It appears to be coming from a point between the focal point and the center of curvature of the mirror.

Two masses m1 and m2, with m1 > m2, have momenta with equal magnitudes. How do their kinetic energies compare?

a. KE1 < KE2 c. KE1 > KE2 b. KE1 = KE2 d. More information is needed.