Heat is thermal energy that matter
A) contains.
B) transfers.
C) both of these
D) none of the above
Answer: B
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Velma's rocket ship is moving away from Mort at a speed of 0.75c. Mort fires a laser beam toward her spaceship, observing the tip of the laser beam to move away from him at speed c. Velma observes this laser beam to move past her at a speed of
A) 1.75c. B) 0.25c. C) 0.75c. D) 1.25c. E) None of the above.
Suppose that a heavy person and a light person are balanced on a teeter-totter made of a plank of wood. Each person now moves in toward the fulcrum a distance of 25 cm. What effect will this have on the balance of the teeter-totter?
A) The teeter-totter will remain in balance. B) The heavy person's end will go down. C) The light person's end will go down. D) One cannot tell whether either end will rise or fall without knowing the relative mass of the plank. E) Only if the plank has significant mass will the light person's end go down.
To which group of polymers does Teflon belong?
a. Natural b. Hydrolytic c. Addition d. Condensation
A baseball is thrown by the center fielder (from shoulder level) to home plate where it is caught (on the fly at eye level) by the catcher. At what point does the magnitude of the vertical component of velocity have its maximum value? (air resistance is negligible)
a. just after leaving the center fielder's hand b. just before arriving at the catcher's mitt c. at the top of the trajectory d. the magnitude of vertical component of velocity is constant