Stan argues that momentum cannot be conserved when a collision is not a head-on collision. Rachel insists it is conserved because each body receives an impulse of equal magnitude. Rachel is correct because
A. each body exerts an equal and opposite force on the other during the collision.
B. the forces act during equal time intervals.
C. the law of conservation of momentum for an isolated system is a vector equation.
D. of all of the above.
E. of only (a) and (b) above.
Answer: D
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Fill in the blank(s) with the appropriate word(s).
Which of the following is an example of convection?
a. Heat radiates from a planet into space. b. Heat travels from atom to atom, from inside a planet to the outside. c. Hot material inside a planet rises, and cool material sinks toward the center. d. Metal conducts energy throughout Earth's core.
The lowest energy level of a hydrogen atom (n = 1) is called
a. the ground state. b. the potential state. c. the ionization state. d. none of these.
Saturn's cloud surface appears more uniform than Jupiter's because:
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