Einstein revolutionized modern physics by ____

a. documenting the existence of gravity through experiments on objects in motion
b. proving that Galileo and Newton were fundamentally incorrect about gravity
c. explaining how specific gravity impacts the geometry of curved space-time
d. providing an explanation of gravity based on the geometry of curved space-time
e. defining the difference between violent motion and natural motion


d

Physics & Space Science

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What is important about the habitable zone around a star that makes astronomers believe life could exist there?

a. The level of UV radiation from the star is minimal there. b. Only in the life zone can complex organic molecules be found. c. Planets in the life zone will always have oxygen atmospheres. d. In the life zone water can exist as a liquid.

Physics & Space Science

Rotational Dynamics: A mechanic is examining the wheel of a bicycle to adjust the brake. With the bicycle off the ground, he manually rotates the wheel until it reaches an angular speed of 12.0 rad/s and then allows it to coast to a stop. If the wheel has a moment of inertia of 0.100 kg ? m2, and the wheel slows uniformly to a stop in 160 s, what is the magnitude of the retarding torque?

A. 1.00 N ? m B. 0.00750 N ? m C. 0.0787 N ? m D. 1.33 N ? m E. 1.67 N ? m

Physics & Space Science

An insoluble solid that is formed when two liquids (usually aqueous solutions) are mixed is called

a) an acid. b) a precipitate. c) a redox. d) an enzyme.

Physics & Space Science

In order to understand the concept of temperature it is necessary to understand

a. the zeroth law of thermodynamics. b. the first law of thermodynamics. c. the second law of thermodynamics. d. all of the above. e. only (b) and (c) above.

Physics & Space Science