A boy on board a cruise ship drops a 30.0 g marble into the ocean. If the resistive force proportionality constant is 0.500 kg/s, what is the terminal speed of the marble in m/s?
A. 0.147
B. 0.294
C. 0.588
D. 1.18
E. 2.35
Answer: C
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A Young's double-slit apparatus is set up so that a screen is positioned 2.1 m from the double slits, and the spacing between the two slits is 0.033 mm. What is the distance between alternating bright fringes on the screen if the light source has a wavelength of 678 nm? (1 nm = 10?9 m)
a. 3.0E–4 m b. 4.3E–2 m c. 2.1E–2 m d. 4.7E–2 m e. 1.1E–2 m
If in a double-slit experiment the wavelength of light is increased, which of the following happens to the interference pattern shown on the screen?
A) The maxima get further apart. B) The maxima stay at the same position. C) The minima and maxima stay at the same position. D) The minima get closer together. E) The minima stay at the same position.
What is the energy of a photon with a frequency of 6.60 × 1015 Hz?
A) 27.3 eV B) 12.3 eV C) 18.1 eV D) 19.6 eV E) 6.60 eV
If F = 5.0 N, what is the magnitude of the force exerted by block 2 on block 1?
a.
17 N
b.
19 N
c.
21 N
d.
23 N
e.
5.0 N