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a sample consisting of 1.5 mol of perfect gas molecules with cpm= 20.8J/Kmol is initally at 230kPa and 315 K. it undergoes reversible adiabatic expansion until its pressure reaches 170kPa. calculate the final volume and temperature and work done.
A vertically positioned charged disk of radius R contains a unfirom positive charge density sigma. Find the expression for the angle theta made between the disk edge and the length L
A 80.5 kg firefighter slides down a pole while a constant frictional force of 300 N retards her motion. Find the firefighter's speed just before she collides with the platform
In the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. The speed of the electron is approximately 2.19 106 m/s. Find the centripetal acceleration of the electron
find out the magnitude of the gravitational force exerted by one on the other.
What is new angular speed of the merry-go-round
How much work is required to bring three protons, initially infinitely far apart, to a configuration where each proton is 1.3 10-15 m from the other two
a wooden box on a wooden table is pulled at constant speed by a 10n force at a 30 degree angle. what is the mass of the
A small 0.300-kg object moves on a frictionless horizontal table in a circular path of radius 2.40 m. what is the radius of the smallest possible circle on which the object can move
A string under a tension of 58.5 N is used to whirl a rock in a horizontal circle of radius 2.75 m at a speed of 20.5 m/s on a frictionless surface, What is the breaking strength, in newtons, of the string
The loaded cab of an elevator has a mass of 3.6 x 10^3 kg and moves 193m up the shaft in 20s at constant speed. At what average rate does the force from the cable do work on the cab.
A cylindrical glass cup has mass m and height h. When the cup is full, it can hold a mass of water equal to 6m. Find the height of water in the cup
You are entered into a bicycle race on a circular at track with a radius of 39.8 m. You get set at the starting line and wait for the starting signal. What was your angular acceleration
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