Most galaxies appear to be
a. composed of one star and seven planets.
b. inside our Milky Way.
c. located on the Earth.
d. moving toward us.
e. moving away from us.
e
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Gasoline is useful in cars because it has
A) chemical potential energy. B) electrical potential energy. C) kinetic energy. D) gravitational potential energy. E) radiative energy.
Which of the following planets can be in opposition?
a. Mercury b. Venus c. Earth d. Mars
What is the wavelength of the emitted photon if an electron in the hydrogen atom makes a transition from the n = 7 state to the n = 2 state?
(c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) A) 199 nm B) 365 nm C) 4480 nm D) 398 nm E) 796 nm
Newton's third law of motion states that whenever one object exerts a force upon a second object, the second object exerts a(n) ______________ and ______________ force upon the first object
Fill in the blank(s) with correct word