What is the speed of a proton that has been accelerated from rest through a potential difference of 4.0 kV?
a. 1.1 × 10^6 m/s
b. 9.8 × 10^5 m/s
c. 8.8 × 10^5 m/s
d. 1.2 × 10^6 m/s
e. 6.2 × 10^5 m/s
c
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In which of the following ways are Pluto and Eris more like comets than like any of the terrestrial or jovian planets?
A) They are made mostly of rock and ice. B) They sometimes enter the inner solar system. C) They have long tails. D) They have thick atmospheres.
A solar cell has a light-gathering area of 10 cm2 and produces 0.2 A at 0.8 V (DC) when illuminated with S = 1 000 W/m2 sunlight. What is the efficiency of the solar cell?
a. 16% b. 7% c. 23% d. 4% e. 32%
Identify a true statement about the cosmic microwave background
A) It is blackbody radiation with an apparent temperature of 2.725 ± 0.002 K. B) It is radiation present in the ultraviolet spectrum. C) It is gamma radiation with an apparent temperature of 5.755 ± 0.005K. D) It is radiation that was present before the big bang.
What type of particle is a proton? (There may be more than one correct choice.)
A) meson B) baryon C) nucleon D) lepton E) hadron