What is special about the ratio distance traveled per unit of time?
A) it is constant for light
B) it is relative to a frame of reference
C) distance traveled very much depends on time
Answer: A
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Spicules are:
A) atoms with the same number of protons but different number of neutrons. B) rapidly moving atoms and ions that escape from the solar corona and blow outward through the Solar System. C) chromosphere flashes that are viewed as thin pink lines above the photosphere. D) flamelike jets of gas extending upward into the chromosphere and lasting 5 to 15 minutes.
A transverse periodic wave is represented by the equation z(y, t) = 1.50 cm sin(1,250 rad/s t + 10.0
What is the direction of the vibration of the wave?
A. the x direction B. the y direction C. the z direction
From the center outward, which of the following lists the "layers" of the Sun in the correct order?
A) core, radiation zone, convection zone, photosphere, chromosphere, corona B) core, radiation zone, convection zone, corona, chromosphere, photosphere C) core, convection zone, radiation zone, corona, chromosphere, photosphere D) core, corona, radiation zone, convection zone, photosphere, chromosphere
What do astronomer's mean when they say that Earth is not in a special spot?
A. All space is expanding so Hubble's law would apply around all galaxies. B. The Big Bang explosion sent all material blasting away from the Earth. C. Hubble measured the expansion law from the Moon, not from the Earth. D. Hubble's law applies to some galaxies but not to others, so many planets besides Earth have their own Hubble's law. E. The Sun is at the center of the universe, but the Earth is not.