Suppose it were possible to drill a frictionless cylindrical channel along a diameter of the Earth from one side of the Earth to another. A body dropped into such a channel will only feel the gravitational pull of mass within a sphere of radius equal to the distance of the mass from the center of the Earth. The density of the Earth is 5.52 × 10^3 kg/m3 and G = 6.67 × 10^?11 N/m2/kg2 . The
mass will oscillate with a period of
a. 84.4 min.
b. 169 min.
c. 24.0 h.
d. 1 130 h.
e. 27.2 d.
a
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An automobile radiator is approximated by the finned flat tube compact heat exchanger of Figure 9-29. Air at 80ºF and 14.7 psia flows through the heat radiator at 40 ft/s. If the air temperature leaving the radiator is 100ºF and its properties are
The blast wave from the supernova is moving at
A.) 1,600 kilometers per hour. B.) 16,000 kilometers per hour. C.) 160,000 kilometers per hour. D.) 16,000,000 kilometers per hour. E.) The speed of light.
State the underlying physical principle of Gauss's Law
What will be an ideal response?
Three solid, uniform, cylindrical flywheels, each of mass 65.0 kg and radius 1.47 m rotate independently around a common axis
Two of the flywheels rotate in one direction at the other rotates in the opposite direction at 3.42 rad/s. Calculate the magnitude of the net angular momentum of the system. A) 298 kg ? m2/s B) 778 kg ? m2/s C) 257 kg ? m2/s D) 222 kg ? m2/s