Which of the following objects are probably not located in the same region of the solar system in which they originally formed?
A) Oort cloud comets
B) Kuiper belt comets
C) asteroids of the asteroid belt
D) Pluto
A) Oort cloud comets
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In the third step of the p-p fusion chain, a _____________ is fused with a _______________ to generate a ________________ with _____________ and _______________ as byproducts
Fill in the blank(s) with correct word
Why are lunar eclipses more commonly seen than solar eclipses?
A) Lunar eclipses occur at night and are easier to see. B) The Moon goes around the Earth faster than the Earth goes around the Sun. C) Earth casts a bigger shadow than the Moon. D) The tilt of the Moon's axis is smaller than the Earth's. E) The Moon is much closer to Earth than to the Sun.
What is the energy of a photon that has the same wavelength as an electron with energy 
J?
A. 10.0 keV B. 101 keV C. 55.3 keV D. 5.53 keV E. 6.77 keV
Mort weighs 700 newtons on Earth. He takes a low-orbit voyage in an Earth satellite. While in orbit his apparent weight [his feeling of weight] is
A) zero. B) a little less than 700 newtons. C) a little more than 700 newtons. D) just a few newtons. E) 700 newtons.