Which of the following quantities are "quantized?"
1. The potential energy at each rung of a ladder.
2. The potential energy along the length of a slide.
3. Wavelength of a standing wave on a string.
4. The settings on an analog radio dial.
5. The settings on a digital radio dial.
A. 1 and 3
B. 2 and 4
C. 1, 3, and 4
D. 1, 3, and 5
D. 1, 3, and 5
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Energy and Momentum: A 0.140-kg baseball is dropped from rest from a height of 2.20 m above the ground and experiences negligible air resistance as it falls. It rebounds to a height of 1.60 m. What change in the ball's momentum occurs as it rebounds from the ground?
A. 0.117 kg ? m/s upwards B. 0.117 kg ? m/s downwards C. 1.70 kg ? m/s upwards D. 0.350 kg ? m/s upwards E. 0.350 kg ? m/s downwards
A 15-?F capacitor and a 30-?F capacitor are connected in series, and charged to a potential difference of 50 V. What is the resulting charge on the 30-?F capacitor?
A. 0.70 mC B. 0.80 mC C. 0.50 mC D. 0.60 mC E. 0.40 mC
What are "dwarf planets"?
What will be an ideal response?
According to quantum mechanics, people should act like waves, too. The reason we do not exhibit wave properties is that our wavelengths are too small to observe. The reason the wavelengths of people are so small is that when finding the wavelength
A. Planck's constant is small and the mass of a person isn't very important. B. Planck's constant is small and people move slowly. C. Planck's constant is small and people masses are much larger than that. D. Planck's constant is small and people move very fast.