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A uniform electric field of magnitude 380 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. The electron has moved 3.60 cm. What is the work done by the field on the electron? What is the change in potential energy associated with the electron? What is the velocity of the electron and direction?
On a touchdown attempt, a 95.0 kg running back runs toward the end zone at 3.75 m/s. What are the initial and final kinetic energies of the system
A 75 kg bobsled is pushed along a horizontal surface by two athletes. After 4.5 m from rest, the bobsled has a speed of 6.0 m/s. How much force did the two athletes push with
A golf ball is hit on a 7.2m tall hill at 23m/s and 30° above the horizontal, what is its velocity at the peak of its flight
The maximum wavelength for which an electromagnetic wave can eject electrons from a platinum surface is 196 nm. what is the maximum speed of the ejected electrons
On a cool morning, when the temperature is 14.0 ^circC, you measure pressure in your car tires to be 20.0 psi. After driving 40.0 mi on the freeway, the temperature of your tires is 50.0 ^circC.
A long, straight wire of length 0.75 m carries a current of I=1.5 A in a region where B= 2.3 T. what is the angle between the field and the wire
A piece of copper at 320 degrees Celsius is dropped into 1.4 kg of water at 17 degrees Celsius. If the equilibrium temperature is degrees Celsius , what is the mass of the copper
The disk in a CD player does not rotate at a constant rate, but spins at a rate determined by a control circuit so that the linear speed of the track being read is constant, what will be its rotation rate at the end
A rescue helicopter lifts a 80 kg person straight up by means of a cable. The person has an upward acceleration of 0.70 m/s2, How much work is done by the tension in the cable
A 0.6410-kg ice cube at -12.40°C is placed inside a chamber of steam at 365.0°C. Later, you notice that the ice cube has completely melted into a puddle of water.
Two scales on a voltmeter measure voltages up to 21.0 and 30.7 V, respectively. Determine the coil resistance
A cube of ice is taken from the freezer at -8.0 and placed in a 113 aluminium calorimeter filled with 306 of water at room temperature of 20.0. The final situation is observed to be all water at 15.0.
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