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You reach out the second story window, which is 5 meter above the sidewalk, and throw a 0.3 kilogram ball straight upward with 6 Joule of kinetic energy.
(a) Find the ball gravitational potential energy when it is released?
__________J
(b) Find the ball gravitational potential energy just before hitting the sidewalk?
(c) Find the ball kinetic energy just before hitting the sidewalk?
_________J
Assume the electric field near the northwest corner of your table is uniform at 3x10^4N/C. We assign 0 as the value of electric potential at the corner. What is the potential 2cm south of the corner?
A length of aluminum wire has a resistance of 16.0 ? at 28.0°C. When the wire is warmed in an oven and reaches thermal equilibrium, find the temperature of the oven
A golf ball strikes a hard, smooth floor at an angle of 24.7 ° and, as the drawing shows, rebounds at the same angle. compute the magnitude of the impulse applied to the golf ball
The two parallel plates in the figure below are 2.0 cm apart and the electric field strength between them is 2.1 104 N/C. An electron is launched at a 45° angle from the positive plate. What is the maximum initial speed v0 the electron can have witho..
Lillian (mass 32.0 kg) standing on slippery ice catches her leaping dog (mass 15 kg) moving horizontally at 2.0 m/s. Evaluate what is the speed of Lillian and her dog after the catch?
The brake is released on a car of mass 500 kg at the top of ahill with height 150m. find the velocity of the car atthe bottom of the hill
A meter stick balances horizontally on a knife-edge at the 50.0 cm mark. With two 5.00 g coins stacked over the 8.0 cm mark, the stick is found to balance at the 43.0 cm mark. What is the mass of the meter stick?
A student's far point is at 17.0 cm, and she needs glasses to view her computer screen comfortably at a distance of 45.0 cm. What should be the power of the lenses for her glasses
question 0.14 kg of water at 88.0 deg c is poured into an insulated cup containing 0.234 kg of ice initally at 0 deg.
A 120 V potential difference is applied to a space heater whose resistance is 19 ? when hot. At what rate is electrical energy transferred to heat
The passengers in a carnival ride travel in a circle of radius 5.0 m. They make one complete circle in a time t=4.0 S. What is their acceleration
The gravitational force between two electrons that are 0.97 m apart is 5.76 multiplied by 10-71 N. Find out the mass of an electron. (Use G = 6.67 10-11 N · m2/kg2.)
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