When we use an analogy that represents the expanding universe with the surface of an expanding balloon, what does the inside of the balloon represent?
A) The inside of the balloon does not represent any part of our universe.
B) the center of the universe
C) the entire universe
D) regions of the universe beyond the Milky Way Galaxy
A) The inside of the balloon does not represent any part of our universe.
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We can determine the surface temperature of a star from
a. studying its continuous spectrum. b. studying its line absorption spectrum. c. measuring the star's luminosity. d. studying its continuous spectrum and measuring the star's luminosity. e. studying its continuous spectrum, studying its line absorption spectrum, and measuring the star's luminosity.
Two speakers in a stereo emit identical pure tones. As you move around in front of the speakers, you hear the sound alternating between loud and zero. This occurs because of __________
Fill in the blank(s) with correct word
A gas is placed in a thermally insulated container as shown below
As the piston is slowly raised, the work done on the gas is...
A container is filled with a mixture of helium (light molecules) and oxygen (heavy molecules) gases. A thermometer in the container reads 22°C. Which gas molecules have the greater average speed?
A) It is the same for both of the gases because the temperatures are the same. B) The oxygen molecules do because they are diatomic. C) The oxygen molecules do because they are more massive. D) The helium molecules do because they are less massive. E) The helium molecules do because they are monatomic.