According to the principle of equivalence, acceleration is equivalent to
A) velocity.
B) net force.
C) gravity.
D) the state of free-fall.
E) energy.
C
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How does the mass of the protostar impact its future evolution?
What will be an ideal response?
Current: A current of 5.0 A flows through an electrical device for 10 seconds. How many electrons flow through this device during this time? (e = 1.60 × 10-19 C)
A. 0.20 B. 20 C. 2.0 D. 3.1 × 1020 E. 31 × 1020
Scientists are in agreement that any world harboring living things must have significant quantities of:
A) helium and hydrogen. B) oxygen and nitrogen. C) some type of liquid. D) some type of sugar.
The event horizon
a. is believed to be a singularity. b. is a crystalline layer. c. has a radius equal to the Schwarzschild radius. d. marks the inner boundary of a planetary nebula. e. is located at the point where synchrotron radiation is created around a pulsar.