Two horizontal pipes are the same length, but pipe B has twice the diameter of pipe A. Water undergoes viscous flow in both pipes, subject to the same pressure difference across the lengths of the pipes
If the flow rate in pipe A is Q, what is the flow rate in pipe B? A) 1/2Q
B) 2Q
C) 4Q
D) 8Q
E) 16Q
E
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When a nucleus of U-238 absorbs a neutron and becomes U-239, a beta emission, then another beta emission results in
A) Th-239. B) Pa-239. C) U-235. D) Pu-239. E) Pb-206.
A railroad car with a mass of 20,000 kg rolls into a second stationary car with a mass of 40,000 kg. The cars latch together and move off with a speed of 1.2 m/s. How fast was the first car moving before the collision?
A compression, at a constant pressure of 190 kPa, is performed on 5.0 moles of an ideal monatomic gas. The compression reduces the volume of the gas from 0.19 m3 to 0.12 m3. The ideal gas constant is R = 8.314 J/mol ? K
The work done by the gas is closest to A) -13 kJ. B) 13 kJ. C) -33 kJ. D) 33 kJ. E) 0.00 kJ.
Through what potential difference must an electron (starting from rest) be accelerated if it is to reach a speed of 3.0 × 10^7 m/s?
a. 5.8 kV b. 2.6 kV c. 7.1 kV d. 8.6 kV e. 5.1 kV