Watts per square meter is a unit for measuring the ______________ of a sound wave
Fill in the blank(s) with correct word
intensity
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On average, how fast do the plates move on the Earth?
A) a few centimeters per year B) a few millimeters per century C) about 1 mile per hour D) a few kilometers per year
In what range of masses are most stars found? What about the range in luminosity? How are they related?
What will be an ideal response?
Why doesn't the Hubble Space Telescope need adaptive optics?
What will be an ideal response?
Observer A sees a ruler moving by in a relativistic train and measures its length to be LA. Observer B moves together with the train and measures the length of the ruler to be LB. These two results will be such that
A) LA > LB. B) LA = LB. C) LA < LB. D) LA could be greater or smaller than LB depending on the direction of the motion.