A plane is traveling at Mach 0.930 through air at a temperature of 0°C. What is the plane's speed? (Speed of sound at 0°C is 331 m/s.)
a. 308 m/s
b. 331 m/s
c. 424 m/s
d. 93.0 m/s
e. Mach number is undefined at 0°C.
a
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Which of the following energy transport processes involves mass motions of material?
a. radiation b. conduction c. convection d. All of the other choices are correct.
According to Heisenberg's uncertainty principle, electrons are more unpredictable than protons. This is because electrons
A) are negatively charged rather than positively charged. B) interact more strongly with other particles. C) have a smaller mass. D) have a smaller volume E) interact more weakly (i.e., less strongly) with other particles.
Two tuning forks produce sounds of wavelengths 3.4 m and 3.3 m. Assuming the speed of sound is 340 m/s, the beat frequency produced is
A) 0.1 Hz. B) 1.0 Hz. C) 2.0 Hz. D) 3.0 Hz. E) 4.0 Hz.
A cylindrical space colony 13 km in diameter and 30 km long has been proposed as living quarters for future space explorers. Such a habitat would have cities, land, and lakes on the inside surface and air and clouds in the center. All this would be held in place by the rotation of the cylinder about the long axis. How fast would such a cylinder have to rotate at its perimeter to produce a 1-g
gravitational field at the walls of the cylinder? a. 200 m/s c. 650 m rad/s b. 250 m/s d. 800 m rad/s