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Communications satellites are placed in orbits so that they always remain above the same point of the earth's surface. A) What must be the period of such a satellite? T= hr B) What is its angular velocity in rad/s?
A binary star system consists of two equal mass stars that revolve in circular orbits about there center of mass. What is the mass (kg) of each star
When you irradiate a metal with light of wavelength 435 nm in an investigation of the photoelectric effect, Find the work function of the irradiated metal in electron volts
The switch in a series RL circuit in which R = 5.60 ?, L = 2.10 H, and ?V = 24.2 V is closed at t = 0.0 s. What is the maximum current in the circuit? What is the current when t = 0.375 s?
A person is lying on a diving board 3.00 m above the surface of the water in a swimming pool. The person looks at a penny that is on the bottom of the pool directly below her. The penny appears to the person to be a distance of 8.00 m from her. What ..
Three 15 cm long rods form an equilateral triangle. Two of the rods are charged to + 13nC , compute the electric field strength at the center of the triangle
In a house the temperature at the surface of a window is 23°C. The temperature outside at the window surface is 4°C. What is the temperature at the outside window surface
GPS satellites orbit the Earth at an altitude of 12,500 miles. How long does it take these satellites to make a complete orbit of the Earth?
Show that the force between parallel wires carrying currents I1 and I2, both in the same direction, find the magnetic force on segment dI2 of wire 2.
An air puck of mass 0.029 kg is tied to the string and allowed to revolve in a circle of radius 2.0m on a frictionless horizontal surface. The other end of the string passes through a hole in the center of surface, and a mass of 2.6 kg is tied to it...
The pressure of a garden hose is 2 atmospheres. If the cross-sectional area of the hose is 4 cm^2 and the nozzle output area is .4cm^, How fast does the water leave the hose
A bucket of water of mass 14.8kg is suspended by a rope wrapped around a windlass, that is a solid cylinder with diameter 0.290m with mass 12.5kg. What is the time of fall
Suppose each of the object's three dimensions is increased by a factor of 3 without changing the material od which the object is made. By what factor will the density change
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