Which of the following frequencies could NOT be present as a standing wave in a 2-m-long organ pipe open at both ends? The fundamental frequency is 85 Hz.
A. 85 Hz.
B. 170 Hz.
C. 255 Hz.
D. 340 Hz.
E. 382 Hz.
Answer: E
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Internal energy is a _____________variable.
Fill in the blank(s) with the appropriate word(s).
At any angular speed, a certain uniform solid sphere of diameter D has half as much rotational kinetic energy as a certain uniform thin-walled hollow sphere of the same diameter when both are spinning about an axis through their centers
If the mass of the solid sphere is M, the mass of the hollow sphere is A) 3/5 M. B) 5/3 M. C) 5/6 M. D) 6/5 M. E) 2 M.
In the Bohr model of the hydrogen atom
a. energy is quantized b. the electron's angular momentum is quantized c. the emission spectrum is quantized d. the absorption spectrum is quantized. e. all of the above
The graph below shows the velocity versus time graph for a ball. Which explanation best fits the motion of the ball as shown by the graph?
a.
The ball is falling, is caught, and is thrown down with greater velocity.
b.
The ball is rolling, stops, and then continues rolling.
c.
The ball is rising, hits the ceiling, and falls down.
d.
The ball is falling, hits the floor, and bounces up.
e.
The ball is rising, is caught, and then is thrown down.