There is very little interstellar gas or dust in most elliptical galaxies
Indicate whether the statement is true or false
TRUE
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The probability of Earth being hit by a 10 km asteroid in the next few hundred years is
A) impossible to predict B) very high C) zero D) small but not zero
The critical angle in air for a particular type of glass is 39.0°. What is the speed of light in this class glass? (c = 3.00 × 108 m/s)
A) 1.97 × 108 m/s B) 1.94 × 108 m/s C) 1.91 × 108 m/s D) 1.89 × 108 m/s E) 2.00 × 108 m/s
An external heat source supplies thermal energy through heating to a system at a rate of 187 W as the environment does work on the system at a rate of -131 W. At what rate is the internal (thermal) energy of the system changing?
A) -56 W B) 320 W C) 56 W D) 190 W E) -320 W
Light is reflecting off a wedge-shaped thin piece of glass producing bright and dark interference fringes. If a certain location has a bright fringe, a nearby point will have a bright fringe if the thickness of the glass increases by:
a. one wavelength of the light. c. 1/8 of a wavelength of the light. b. 1/4 of a wavelength of the light. d. 1/2 of a wavelength of the light.