At the very small-scale level, matter is
A) nearly at rest.
B) subject only to the strong nuclear force.
C) really made of tiny pieces of pizza.
D) in rapid motion.
E) very cold.
D
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The cosmological redshift is actually not a velocity at all, but a measure of the expansion of space-time
Indicate whether the statement is true or false
The graphs below show a voltage phasor at different instances of time. Which voltage phasor shows the instantaneous value of the voltage with the largest magnitude?
A.
B.
C.
D.
E.
Explain the relationship between the heat released by the chemical reaction and the change in temperature
It took two centuries for the Copernican model to replaced the Ptolemaic model because
A) in Copernicus' time, there were no telescopes. B) the Church wouldn't let anyone talk about Copernicus' model for 200 years. C) there was no scientific evidence to support either model until Galileo made his observations. D) the Ptolemaic model was simpler and more aesthetically pleasing. E) the Copernican model required complicated new terms to explain it correctly.