The gravitational force in a molecular cloud depends on

A) density only.
B) temperature only.
C) density and temperature.
D) composition.
E) thermal pressure.


A

Physics & Space Science

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How many neutrons are in a nucleus?

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The specific heat of an ideal gas at constant pressure is greater than the specific heat of an ideal gas at constant volume because

a. work is done by a gas at constant pressure. b. work is done by a gas at constant volume. c. no work is done by a gas at constant pressure. d. the temperature remains constant for a gas at constant pressure. e. the temperature remains constant for a gas at constant volume.

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A chemical combination of two or more substances in variable proportions is called

a. a mixture. b. a compound. c. an ion. d. a molecule.

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The rotational inertia of the dumbbell (see figure) about axis A is twice the rotational inertia about axis B. The unknown mass is:

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