Concave spherical mirrors produce images which
A)
are always smaller than the actual object.
B)
are always larger than the actual object.
C)
are always the same size as the actual object.
D)
could be smaller than, larger than, or the same size as the actual object, depending on the placement of the object.
D
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A locomotive is pulling three train cars along a level track with a force of 100,000 N. The car next to the locomotive has a mass of 80,000 kg, the next one, 50,000 kg, and the last one, 70,000 kg
You can neglect the friction on the cars being pulled. (a) What is the magnitude of the force between that the 80,000-kg car exerts on the 50,000-kg car? (b) What is the magnitude of the force that the 50,000-kg car exerts on the 70,000-kg car?
General Relativity is Einstein's theory of ________
Fill in the blank(s) with correct word
As a result of any natural process, the total entropy of any system plus that of its environment
A) never decreases. B) sometimes decreases. C) never increases. D) always stays the same.
The Cassini space probes used electricity provided by __________
Fill in the blank(s) with correct word