If a source of sound is traveling toward you, the speed of the sound waves reaching you is _______________ the speed the sound waves would have had if the source were stationary

a. faster than
b. slower than
c. the same as


C
The frequency is higher, but the speed is the same.

Physics & Space Science

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Which of these electromagnetic waves have the shortest wavelength?

A) radio waves B) infrared waves C) X-rays D) ultraviolet waves E) light waves

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Which of the following is most easily understood to be quantized?

A) the number of eggs in an egg carton B) the amount of water in a glass C) the volume of air in a balloon D) the amount of time in an hour E) none of the above

Physics & Space Science

The flow of heat in a cold soft drink will be from ______

a. the drink to the ice cubes b. the drink to the outside air c. the drink to the glass d. the ice cubes to the drink

Physics & Space Science

The observed evidence we have for black holes includes

A) X-rays that are thought to come from the center of a black hole. B) visible light that is thought to come from the center of a black hole. C) temperature measurement of certain extremely cold stars that are thought to be black holes. D) X-rays that are thought to come from gases that are outside of a black hole. E) observations of certain regions of space, larger than the largest known stars, that emit no light.

Physics & Space Science