An object’s x-acceleration ax (t) is shown in the boxed graph at the top left. Which of the other graphs in the set most correctly describes its x-velocity?





A. A

B. B

C. C

D. D

E. E


D. D

Physics & Space Science

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Indicate whether the statement is true or false.

Physics & Space Science

A blackbody is an ideal system that

A) absorbs 100% of the light incident upon it, but cannot emit light of its own (i.e., a "black" body). B) emits 100% of the light it generates, but cannot absorb radiation of its own. C) either absorbs 100% of the light incident upon it, or emits 100% of the radiation it generates. D) absorbs 50% of the light incident upon it, and emits 50% of the radiation it generates.

Physics & Space Science

A person weighing 0.70 kN rides in an elevator that has an upward acceleration of 1.5 m/s2 . What is the magnitude of the force of the elevator floor on the person?

a. 0.11 kN b. 0.81 kN c. 0.70 kN d. 0.59 kN e. 0.64 kN

Physics & Space Science

What physical process results in the convection of thermal energy?

a. Collisions between the particles in a material. b. The movement of a fluid through a space. c. The energy exchange when a liquid becomes a gas. d. The energy transferred by electromagnetic waves traveling between objects. e. Brownian motion.

Physics & Space Science