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An electron gun sends electrons through a region with an electricfield of 1.5 104 N/C for a distance of 2.5cm. If the electrons start from rest, how fast are they moving after traversing the gun?
A down jacket has a surface area of 0.83 m2 and is filled with a 3.6 cm thick layer of down, which has a thermal conductivity of 6.0 10-6 kcal/(s · m · C°). At what rate is heat conducted through the coat
In a hydroelectric installation, a turbine delivers 1890 hp to a generator, which in turn converts 37.9% of the mechanical energy into electrical energy. Under these conditions,
A narrow glass tube, open at one end, closed at the other, is 40cm long. Determine the frequency of the moving sound source
A cheetah is after its prey, which has a mass that is one-half that of the cheetah. When both start from rest, the cheetahsustains 2.50 times the acceleration as does its prey in the same time period.
A motorist drives north for 35 minutes at 85 km/h and then stops for 15.0 minutes. He then continues north, traveling an additional 130 km in 2 h.
a light ray traveling in a slab of crown glass surrounded by air. the ray is incident on the right surface at an angle
A mass m1 = 3.2 kg rests on a frictionless table and connected by a massless string over a massless pulley to another mass m2 = 4.3 kg which hangs freely from the string, How much work is done by gravity on the two block system
A truck weighs four times as much as a car. if the truck coasts into the car at 12km/h and they stick together, what is their fimal velocity.
0.0029 J of energy are stored in a parallel-plate capacitor whose plates each have area 0.30 m2 and are 1.5 mm apart
If the entrance velocity into the pipe is 12.5 m/s, what is the rate of flow of the material (air) 'Rm'? What is the velocity 'Vf' when the air is ejected into the surroundings at 1 atm through a nozzle
a charge of -3.89c is fixed at the center of a compass. two additional charges are fixed on the circle of the compass
A skier starts from rest at the top of a hill. The skier coasts down the hill and up a second hill. The crest of the second hill is circular, What must be the height of the hill
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