Most pulsars have a measured mass of:
A) about 1.4 solar masses.
B) less than 1.0 solar masses.
C) between 2 and 4 solar masses.
D) 5.2 solar masses.
E) greater than 10 solar masses.
A
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A block is launched up an incline plane. After going up the plane, it slides back down to its starting position. The coefficient of friction between the block and the plane is 0.3 . The time for the trip up the plane:
a. is the same as the time for the trip down. b. is more than the time for the trip down. c. is less than the time for the trip down. d. cannot be found without knowing the angle of inclination.
Standing waves can be set up in a string when two waves that are
a. of the same frequency and amplitude, but are opposite in direction of travel, meet each other. b. of the same frequency, amplitude, and direction of travel are also 180° out of phase. c. of the same frequency, amplitude, and direction of travel meet each other. d. of the same frequency, amplitude, and velocity meet each other.
In the context of a redshift and a blueshift, "red" and "blue" refer to the actual color of the light
Indicate whether the statement is true or false
An atom consists of (check all that apply)
A. negatively charged protons in a nucleus orbited by positively charged electrons. B. positively charged protons in a nucleus orbited by negatively charged neutrons. C. electrons in a nucleus orbited by protons. D. None of these choices are correct.