The cluster of galaxies that includes our Milky Way is called the ______________
Fill in the blank(s) with correct word
Local Group
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An atom can be excited into a higher energy state by absorbing a __________
Fill in the blank(s) with correct word
Four identical 1.5-mF capacitors are connected together electrically. What is the least possible capacitance of the combination?
a. 3.0E–4 F b. 2.5E–4 F c. 3.8E–4 F d. 1.5E–3 F e. 6.7E–4 F
You push an object, initially at rest, across a frictionless floor with a constant force for a time interval, ?t, which results in a final speed of v for the object. You repeat the experiment, but with a force that is half as large. What time interval is now required to reach the same final speed?
1. 4?t 2. ?t 3. ?t/2 4. 2?t
An 8.0-kg object rests on the floor of an elevator which is accelerating downward at a rate of 1.3 m/s2. What is the magnitude of the force the object exerts on the floor of the elevator?
A. 59 N B. 10 N C. 89 N D. 68 N E. 78 N