One hundred milliliters of water is poured into a U-tube that has a cross-sectional area of 1 cm2 . Then 100 milliliters of oil, with a density 80% that of water, is poured down one side of the U-tube so that the oil floats on the water. Find the difference in height of the liquid surfaces on the two sides of the U-tube
20 cm
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Europa's visible surface:
A) contains a very clean liquid. B) contains several craters. C) has long cracks in its icy crust. D) has a terrain resembling a liquid stream.
Two 1.5-V batteries are inserted into a flashlight. The batteries are in series, with their positive terminals in the same direction. One battery has an internal resistance of 0.15 ?, and the other has an internal resistance of 0.20 ?. When the switch is closed, a current of 0.54 A passes through the flashlight bulb. What percent of the dissipated power is dissipated in the batteries?
a. 10.2% b. 6.3% c. 1.6% d. 1.9%
Two identical particles, each with a mass of 2.0 ?g and a charge of 25 nC, are released simultaneously from rest when the two are 4.0 cm apart. What is the speed of either particle at the instant when the two are separated by 10 cm?
a. 7.3 m/s b. 9.8 m/s c. 9.2 m/s d. 6.5 m/s e. 4.6 m/s
In the figure, the coefficient of kinetic friction between the surface and the larger block is 0.20, and the coefficient of kinetic friction between the surface and the smaller block is 0.30. If F = 10 N and M = 1.0 kg, what is the tension in the connecting string?
a.
8.0 N
b.
6.0 N
c.
6.7 N
d.
8.7 N
e.
3.0 N