Which of the following objects never collide with the Earth?
A) Apollo asteroids
B) Amor asteroids
C) Aten asteroids
D) long period comets
E) short period comets
B
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How many revolutions per second are needed for a centrifuge to produce an acceleration of 1200g at a radius arm of 15.0 cm?
a. 40.7 rev/s c. 81.4 rev/s b. 44.6 rev/s d. 151 rev/s
An atom can be excited into a higher energy state by
a. emitting a photon. b. absorbing a photon. c. undergoing the photoelectric effect. d. decreasing its de Broglie wavelength. e. the uncertainty principle.
In the proton-proton chain
a. no neutrinos are produced. b. energy is released because a helium nucleus has a greater mass than a hydrogen nucleus. c. no photons are produced. d. carbon serves as a catalyst for the nuclear reaction. e. energy is produced in the form of gamma rays and the velocity of the created nuclei.
Contrast Jupiter's magnetosphere with that of Earth and of the other jovian planets
What will be an ideal response?