Star formation ceased first in the:
A) nucleus.
B) spiral arms.
C) bulge.
D) halo.
E) galactic disk.
D
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If each frame of a motion picture film is 35 cm high, and 24 frames go by in a second, estimate how many frames are needed to show a two-hour-long movie
a. 1400 b. 25,000 c. 50,000 d. 170,000 e. This cannot be determined without knowing how many reels were used.
Orbital Angular Momentum: What is the minimum angle between the z-axis (or any other axis you choose) and the orbital angular momentum of an electron in the n = 4 state?
A. 30.0° B. 41.4° C. 60.0° D. 45.0°
The relativistic kinetic energy formula is valid
A) only for speeds near the speed of light. B) at all speeds. C) only for subatomic particles, such as electrons and protons.
A three-cell flashlight has 3 batteries in series each with an emf of 1.5 V. If the bulb has a resistance of 50 
what current is flowing when the flashlight is operating? (Assume the internal resistance of the batteries is negligible.)
A. 30 mA B. 10 mA C. 27 mA D. 90 mA E. 11 A