The figure below shows the positions of particles in a longitudinal standing wave. One quarter period later the particle distribution is shown in
A.
B.
C.
D.
E.
Answer: E
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The pupil of the human eye is approximately 0.8 cm in diameter when adapted to the dark. The ratio of the light-gathering power of a 1.6-m telescope to that of the human eye is ____
a. 2 b. 4 c. 20 d. 400 e. 40,000
In a contest, two tractors pull two identical blocks of stone the same distance over identical surfaces. However, block A is moving twice as fast as block B when it crosses the finish line. Which statement is correct?
a. Block A has twice as much kinetic energy as block B. b. Block B has lost twice as much kinetic energy to friction as block A. c. Block B has lost twice as much kinetic energy as block A. d. Both blocks have had equal losses of energy to friction. e. No energy is lost to friction because the ground has no displacement.
Discuss why the new theory, called quantum mechanics, was so successful
What will be an ideal response?
What does it mean for something to be "quantized?"
a. It can have only certain discrete values. b. It can have only integer values. c. It can have values only between certain limits. d. none of the above