What is a quark?
A. a burst of radiation seen near black holes
B. a very short wavelength radiation emitted by active galaxies
C. a remote active galaxy
D. a kind of subatomic particle that protons and neutrons are composed of
E. None of these choices is correct.
Answer: D
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Determine the magnitude and sense (direction) of the current in the 500-? resistor when I = 30 mA.
A. 56 mA left to right B. 56 mA right to left C. 48 mA left to right D. 48 mA right to left E. 26 mA left to right
A steel rod 55 cm long has a diameter of 30 cm. The compressive strength (the maximum stress it can support without breaking) of this steel is 500 × 106 N/m2. What is the compression force that would break the rod?
A) 3.5 × 107 N B) 2.4 × 107 N C) 1.4 × 108 N D) 4.7 × 108 N E) 8.9 × 108 N
Define specific gravity
What will be an ideal response?
According to Newton, when the distance between two interacting objects doubles, the gravitational force is
A) half. B) one-quarter. C) the same. D) twice as much. E) four times as much.