A neutron has a mass of 1.67 × 10^-27 kg. The de Broglie wavelength is 1.4 × 10^-10 m. How fast is the neutron going? (in m/s)
a. 3.4 × 10^3
b. 2.8 × 10^3
c. 3.9 × 10^3
d. 2.6 × 10^3
e. 1.7 × 10^3
B
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The bright and dark bands you see in a photograph of a double-slit interference pattern represent
A. the respective positions of the crests and the troughs of the light wave. B. an interference pattern that is not present unless it is produced by the camera lens. C. the respective positions of constructive and destructive interference of light from the two sources. D. the respective positions of destructive and constructive interference of light from the two sources. E. the respective positions of bright and dark particles of light.
How can a volcanic eruption affect weather?
What will be an ideal response?
The mass of an apple on the Earth is 0.2 kg. On the Moon, the mass of the same apple would be
A. greater than zero but less than 0.2 kg. B. greater than 0.2 kg. C. 0.2 kg. D. zero.