Matter Waves: Which of the following actions will increase the de Broglie wavelength of a speck of dust? (There could be more than one correct choice.)
A. Increase its mass.
B. Increase its speed.
C. Decrease its mass.
D. Decrease its speed.
E. Decrease its momentum.
Answer: E
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A container of water is placed on a scale, and the scale reads 120. g. Now a 20.0g piece of copper (specific gravity = 8.90 ) is suspended from a thread and lowered into the water, not touching the bottom of the container
What will the scale now read? A) 140 g B) 120 g C) 138 g D) 122 g E) 112 g
Identical forces act for the same length of time on two different objects. The magnitude of the change in momentum of the lighter object is
A) smaller than the magnitude of the change in momentum of the larger mass, but not zero. B) zero. C) exactly equal to the magnitude of the change in momentum of the larger mass. D) larger than the magnitude of the change in momentum of the larger mass. E) There is not enough information to answer the question.
The _____ is radiation from the hot matter of the Universe soon after the big bang
A) gamma radiation B) cosmic microwave background C) neutron radiation D) cosmic ultraviolet background
A parallel plate capacitor of capacitance C0 has plates of area A with separation d between them. When it is connected to a battery of voltage V0, it has charge of magnitude Q0 on its plates. It is then disconnected from the battery and the plates are pulled apart to a separation 2d without discharging them. After the plates are 2d apart, the magnitude of the charge on the plates and the potential difference between them are what?
A.
Q0, 
V0B.
V0C.
D.
E.