An object is placed 15 cm from a spherical concave mirror with a focal length of magnitude 20 cm. If the object is 4.0 cm tall, how tall is the image?
A) 1.0 cm
B) 2.0 cm
C) 8.0 cm
D) 16 cm
D
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A bar magnet is falling through a loop of wire with constant velocity. The south pole enters first. As the magnet leaves the wire, the induced current (as viewed from above):
a. is along the length of the magnet. c. is counterclockwise. b. is clockwise. d. is zero.
In modern Miller—Urey experiments it is assumed that carbon and nitrogen in the early atmosphere were present as
A) methane (CH4 ) and ammonia (NH3) B) carbon dioxide (CO2 ) and nitrogen (N2) C) carbonates (CO3-) and nitrates (NO3-) D) carbon and nitrogen atoms
A ray of light enters an equilateral prism made of material with n = 1.45. What angle of incidence,
will cause the internally refracted ray to be parallel to the base of the prism?
A. 46.5 
B. 30.0
C. 20.2
D. 5.70
E. this cannot happen
A gas is confined to a rigid container that cannot expand as heat energy is added to it. This process is
A) isothermal. B) isometric. C) isobaric. D) isentropic. E) adiabatic.