The ____ of an object is a measure of the amount of matter it contains. On the other hand ____ is a measure of the gravitational force on an object.
a. weight; mass
b. mass; weight
c. energy; force
d. force; energy
e. momentum; energy
Question 2What would the spectrum of hydrogen look like if we could see into the ultraviolet?
What will be an ideal response?
Question 3Newton concluded that a force from the Earth had to act on the Moon because
a. a force is needed to keep the Moon in motion in its orbit.
b. a force is needed to pull the Moon outward.
c. a force is needed to accelerate the Moon toward Earth away from straight-line motion.
d. the Moon moved at a constant velocity in a straight line.
e. All of the other choices are correct.
Question 4Describe two ways in which an atom can be excited.
What will be an ideal response?
Question 5The force of gravity from one object extends to infinity never going to zero. When we say that gravitation is universal we mean that
a. the Earth exerts gravitational force on objects on its surface.
b. the Earth exerts a gravitational force on its Moon and vice versa.
c. the Earth, Moon, and Sun exert gravitational forces on each other.
d. all material objects in the universe exert gravitational forces on one another.
Question 6Why should photons emitted by a hotter gas have, on average, shorter wavelengths than photons emitted by a cooler gas?
What will be an ideal response?
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