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It is found experimentally that the electric field in a certain region of Earth's atmosphere is directed vertically down. At an altitude of 280 m the field has magnitude 60.0 N/C. At an altitude of 170 m, the magnitude is 100 N/C. Find the net amount of charge contained in a cube 110 m on edge, with horizontal faces at altitudes of 170 and 280 m. Neglect the curvature of Earth.
A bullet moving at 244 m/s strikes a tree and penetrates a distance of 8.34 mm before stopping. What was the average acceleration of the bullet as it slowed
A 120 g copper calorimeter cup contains 185 cm3 of water and 25 g of ice, all in thermal equilibrium. What was the initial temperature of the iron
A 10 g ball of clay traveling east at 1.5m/s collides and sticks together with a 30g ball of clay traveling north at 2.5m/s. What is the speed of the resulting ball of clay
Two men lift a 45 kg block from the floor to a shelf 1.0 meter above the floor without accelerating the block. How much work is done by each man
One mole of an ideal gas does 2 600 J of work on its surroundings as it expands isothermally to a final pressure of 1.00 atm, Determine the initial volume of the gas
A puck of mass m1 = 63g and radius r1 = 4.30 cm glides across an air table at a speed of = 1.50 m/s. It makes a glancing collision with a second puck of radius r2 = 6.00 cm and mass m2 = 115 g (initially at rest) such that their rims just touch.
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.
A long freight train has a mass of 5×(10^6) kg and is initially traveling at 25 m/s. Find the time it takes the train to stop
The nuclear reaction that powers the sun is the fusion of four protons into a helium nucleus. How much energy is released in each fusion
An ordinary glass is filled to the brim with351.0mL of water at 100°C. If the temperature decreased to29°C, how much water could be added to the glass
A car with mass of 1000.0 kg accelerates from 0 m/s to 40.0 m/s in 11.0 s. What is the average mechanical power output of the engine
An electromagnet used to lift a car at a junkyard needs to generate a magnetic field strength of about one tesla. The magnet consists of a cylindrical iron core 1 m in diameter and 10 cm high wrapped with 100 turns of wire. Assuming the permeability ..
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