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A 15.0 tank contains 0.209 of helium at 23.0. The molar mass of helium is 4.00 .How many moles of helium are in the tank? What is the pressure in the tank, in pascals? What is the pressure in the tank, in atmospheres?
An air track glider undergoes a perfectly inelastic collision with an identical glider that is initially at rest. What fraction of the first gliders initial kinetic energy is transformed into thermal energy in this collision?
To hoist himself into a tree, a 72.0-kg man ties one end of a nylon rope around his waist and throws the other end over a branch of the tree. determine the man's upward acceleration
A gas at a temperature of 385 K, a pressure of 72 kPa and occupying a volume of 0.36 m3, is compressed to a volume of 0.10 m3. The temperature of the gas rises by 34~K. What is the pressure of the compressed gas? Give your answer in pascals
A science student is riding on a flatcarof a train traveling along a straight horizontal track at aconstant speed of 12.0 m/s. How high does she see the ball rise
The emissivity of the human skin is 97.0 percent. Use 35.0 °C for the skin temperature and approximate the human body by a rectangular block with a height of 1.66 m, How much energy does our body lose in one second
A block weighing 50 N rests on a 37 deg incline. If the incline is frictionless what would be its acceleration down the incline
A 100 meter length of steel changes temperature by 30 C during the course of a day. If the coeffcient of thermal expansion of steel is 12 parts per million per C, what is the change in length of the steel
Think of the relationship between Kirchoff's Junction Rule and conservation of charge, Why cant charge build up at a junction of wires
the magnetic field 7.5 cm directly above the center of a 25 turn coil of radius 15cm is 0.80 mT. Find the current in the coil
A spy satellite is in circular orbit around Earth. It makesone revolution in 6.01 hours. How high above Earth's surface is the satellite
A circular wire loop of area 0.18m squared carries a current of 4 A. the coil lies in a horizontal plane with the current flowing in the counterclockwise direction when viewed from above. At this point the earth’s magnetic field is 1.2x10^-4 T direct..
When ultraviolent light with a wavelength of 262nm falls upon a clean metal surface, What is the photoelectic threshold wavelength for this metal
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