A cool but very luminous star must have ________.

A. a very small radius
B. a very small mass
C. a very low velocity
D. a very large radius


Answer: D

Physics & Space Science

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If the R-value of a wall is 10 ft2-?F-hr/Btu, then the rate of heat transfer through a 2 ft × 3 ft section of wall, with ?T = 50°F, will be:

a. 10 b. 30 c. 500 d. 3000 e. 10,000 Btu/hr

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Show that the isobaric compressibility for an ideal gas is 1/T.

What will be an ideal response?

Physics & Space Science

The type of energy that a swinging pendulum has at the high point of its swing is

A) thermal. B) kinetic. C) spiritual. D) elastic. E) gravitational.

Physics & Space Science

The first minerals to crystallize from a cooling magma have a

A) high melting point and a low silica content. B) low melting point and a high silica content. C) high melting point and a high silica content. D) low melting point and a low silica content.

Physics & Space Science