Mercury's most unusual orbital feature, as compared to the other planets, is:
A) the size of its orbit.
B) the shape of its orbit.
C) its orbital period.
D) the size of the planet.
E) that it has no moons.
B
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Bosons are force-carrying particles
a. True b. False Indicate whether the statement is true or false
An electron moving perpendicular to a uniform magnetic field of 3.2 × 10-2 T moves in a circle of radius 0.40 cm. How fast is this electron moving? (e = 1.60 × 10-19 C, melectron = 9.11 × 10-31kg)
A) 2.2 × 107 m/s B) 1.9 × 107 m/s C) 1.9 × 106 m/s D) 3.0 × 107 m/s E) 0.80 × 107 m/s
It takes 10 J of work to push a charge into an electric field. Relative to its starting position it has gained a potential energy of
A) less than 10 J. B) 10 J. C) more than 10 J. D) none of the above
Radiant energy reaching the Earth from the sun is not sufficient to keep the Earth's surface temperature comfortable for life. Of the following, the most likely source of the additional thermal energy is from
a. fusion of hydrogen nuclei in the Earth's core. b. fusion of high Z nuclei in the Earth's core. c. fission of radioactive nuclei inside the Earth. d. fission of radioactive nuclei in cosmic rays. e. deflection of radioactive nuclei in cosmic rays.