A conclusion that follows from E=mc2 is that, at the microscopic level,
A) matter is made of force fields.
B) tiny indestructible pieces of matter move through empty space.
C) there is only matter and antimatter.
D) all matter must vibrate at the speed of light.
E) matter is made of radiation.
A
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Current evidence suggests that the Universe is
a. flat, infinite, and neither expanding nor contracting. b. closed, finite, and slowing its expansion. c. open, infinite, and slowing in its expansion. d. static with no expansion. e. flat, infinite, and accelerating in its expansion.
Why was it advantageous for the Voyager missions to consist of flybys rather than orbiters?
A) Each individual spacecraft was able to visit more than one planet. B) Spacecraft making flybys can return to Earth more quickly than orbiters. C) It was easier for data to be radioed back to Earth with flybys than orbiters. D) Flyby spacecraft can get closer to a planet than an orbiting spacecraft.
You observe a star and you want to plot it on an H-R diagram. You will need to measure all of the following, except the star's
A) mass. B) distance. C) apparent brightness. D) spectral type.
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Answer the following statement true (T) or false (F)