SAE No. 10 oil has a viscosity of 0.20 Pa-s. How long would it take to pour 4.0 L of oil through a funnel with a neck 15. cm long and 2.0 cm in diameter?
(Assume the surface of the oil is kept 6.0 cm above the top of the neck, and neglect any drag effects due to the upper part of the funnel.)
A) 105 s
B) 52 s
C) 1.5 minutes
D) 46 s
E) 84 s
Question 2
In the photoelectric effect, the energies of the ejected electrons
A) are proportional to the speed of light.
B) are proportional to the intensity of light.
C) are proportional to the frequency of light.
D) vary randomly.
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