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A severe thunderstorm dumped 2.8 in of rain in 30 min on a town of area 34 km2. What mass of water (in kg) fell on the town? One cubic meter of water has a mass of 103 kg.
A 765 kg car is being pushed along a flat parking lot at a constant speed of 1.98 m/s, What force is being used to push the car
A bucket of mass 1.70kg is whirled in a vertical circle of radius 1.55m . At the lowest point of its motion the tension in the rope supporting the bucket is 21.0N. Find the speed of the bucket
A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 621 m/s. What is the horizontal distance between the end of the rifle and the bull's-eye
A certain commercial mass spectrometer (Fig. 28-12) is used to separate uranium ions of mass 3.92 x 10-25 kg, calculate the thermal energy (in J) produced in the cup in 1.07 h
The force of repulsion that two like charges exert on each other is 4.0 N. What will the force be if the distance between the charges is increased to 6 times its original value.
A rope of negligible mass is wrapped around a 225 kg solid cylinder of radius 0.40 m. The cylinder is suspended some meters off the ground with its axis oriented horizontally, and turns on that axis without friction.
The distance between the electron and proton in a hydrogen atom is 5.3 x10-11 m. Find the speed of the electron as it orbits the proton
A rock is thrown vertically upward with a speed of 11.0m/s from the roof of a building that is 70.0m above the ground, What is the speed of the rock just before it strikes the ground
Two kilograms of steam at 2 MPa, 250° C are contained in a rigid vessel. How much heat must be removed from this vessel to cool it to 25° C
Earth's radius is 6.38 × 106 m, and it completes one revolution every day. What is the tangential speed of a person standing on the equator
A 1.56m tall student stands before a vertical mirror. She can just see her whole body, from head to toe. How tall is the mirror
A car traveling at 21 runs out of gas while traveling up a 21 slope.How far up the hill will it coast before starting to roll back down.
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