Energy flows from hot to cold and thus from the core to the surface of the Sun

a. True
b. False
Indicate whether the statement is true or false


True

Physics & Space Science

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A spectrograph spreads out light according to ____ to form a spectrum

a. wavelength b. frequency c. interference d. aberration e. grating

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The wave front shown at the left for light in air reaches the plane surface (shown by a slanted line) that bounds a medium with n = 1.50.Which diagram below correctly shows the wave front while entering the medium at the right?

A. A B. B C. C D. D E. E

Physics & Space Science

As a car moves forward on a level road at constant velocity, the net force acting on the tires is:

a. greater than the normal force times the coefficient of static friction. b. equal to the normal force times the coefficient of static friction. c. the normal force times the coefficient of kinetic friction. d. zero.

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On the H-R diagram our Sun is a

A) white dwarf. B) star of average luminosity and temperature. C) red supergiant. D) relatively bright, blue star.

Physics & Space Science