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Problem 2-42. A solid cube of uniform density and sides of length b is in equilibrium on top of a cylinder of radius R (figure 2-C). The planes of four sides of the cube are parallel to the axis of the cylinder. The contact between cube and sphere is perfectly rough. Under what conditions is the equilibrium stable or not stable?
Use the mass density of radiation in the preceding problem to determine the mass density of radiation when T = 2.725 K. How does this compare with the average density of matter in the universe? Does this mean we are in a radiation-dominated or mat..
use the definition for coefficient of volume expansionnbspg nbsp?vv?qnbspto show that the change in densitydrnbspof a
Assume that a lightning bolt can be represented by a long straight line of current. If 15.0 C of charge passes by in a time of 1.5 x 10-3s, What is the magnitude of the magnetic field at a distance of 23.0 m from the bolt
a 1.00 kg metal ball having net charge q 5.99 uc is thrown out of a window horizontally at a speed v 15.4 ms. the
a skier is pulled up a slope at a constant velocity by a tow bar. the slope is inclined at 25.5deg with respect to the
A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 93 kg. The mass of the rock is 0.27 kg. Initially the wagon is rolling forward at a..
A point charge q1=4.0 uC is at the origin and a point charge q2=6.0 uC is on the x axis at x=3.0 m. find the eclectic force on charge
A student calculates the frequency of a waveform produced by a tuning fork to be 303 Hz. If the tuning fork is stamped with a frequency of 279 Hz, what is the percent error for the experiment
The astronaut travels to a planet that has a mass 4 times greater than Earth's mass, and its radius is 2 times greater than Earth's radius. What is the astronaut's weight on the planet?
Two 30 kg masses have velocities (in m/s) of vector v 1 = 10 i(hat) - 20 j(hat), Determine the velocity of the center of mass of the system
A coffee-maker contains a heating element that has a resistance of 34 ohms. What is the current in the heating element
A fire engine moving to the right at 40 m/s sound its horn (frequency = 500 Hz) at the two vehicles shown in the figure. The car is moving to the right at 30 m/s, while the van is at rest. (a) What frequency is heard by the passenger in the car?
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