A bubble of air released from the bottom of a lake
A) rises to the top at constant volume.
B) becomes smaller as it rises.
C) becomes larger as it rises.
D) alternately expands and contracts as it rises.
E) none of the above
Answer: C
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The ____________________ theory describes pulsars as rotating neutron stars with strong magnetic fields that confine high-speed charged particles in two beams emanating from the magnetic poles of the neutron star
Fill in the blank(s) with correct word
The EPR argument assumes which of the following to conclude that quantum mechanics is incomplete?
A. Quantons must have objectively real properties. B. Superluminal communication is impossible. C. Both assumptions. D. Neither assumption.
A series RLC circuit in a radio is in resonance with AM 700 kHz. If the radio station is changed to AM 2100 kHz, by what factor must the capacitance be multiplied to again achieve resonance?
a. 9 b. 3 c. 1 d. 1/3 e. 1/9
A straight wire carries a 12-A current eastward and a second straight wire carries a 14-A current westward. The wires are separated by a distance of 42 cm. The force per unit length on the wire carrying 12 A is
A) 8.0 × 10-5 N/m. B) 5.1 × 10-7 N/m. C) 5.1 × 10-4 N/m. D) 5.1 × 10-6 N/m. E) 8.0 × 10-7 N/m.