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A physics professor is pushed up a ramp inclined upward at an angle 33.0^\circ above the horizontal as he sits in his desk chair that slides on frictionless rollers. The combined mass of the professor and chair is 82.0 kg. He is pushed a distance 2.85 m along the incline by a group of students who together exert a constant horizontal force of 593 N. The professor's speed at the bottom of the ramp is 2.30 m/s.Use the work-energy theorem to find his speed at the top of the ramp.
A 1.5 ?F capacitor is charged to 57 V by a battery, which is then removed. At time t = 0, Calculate the potential difference VL(t) across the inductor as a function o
A pesky 1.7-mg mosquito is annoying you as you attempt to study physics in your room, What is the maximum uncertainty in the horizontal position of the mosquito
Five moles of a monatomic ideal gas expand adiabatically, and its temperature decreases from 460 to 155 K. Determine the work done by the gas
How much work should be done to bring 3 electrons from a great distance apart to within 2.55E-10 m from one another (at the corners of an equilateral triangle).
A boat moves 15 .0 km across a lake in 30.0 min. What is the average speed of the boat in kilometers per hour
A horizontal string tied at both ends is vibrating in its fundamental mode. The traveling waves have speed v, frequency f, amplitude A, and wavelength l.
During a 58-ms interval, a change in the current in a primary coil occurs. This change leads to the appearance of a 7.1-mA, What is the change in the primary current
A string under a tension of 60.0 N is used to whirl a rock in a horizontal circle of radius 2.70 m at a speed of 20.5 m/s on a frictionless surface as shown in the figure below. As the string is pulled in, the speed of the rock increases. When the st..
The speed of sound does not depend on the loudness or the frequency of sound. Explain how temperature and humidity affect the speed of sound
A place kicker should kick a football from a point 32 m (about 35.0 yd) from the goal, and the ball should clear the crossbar, which is 3.050 m high. When kicked, the ball leaves the ground with a speed of 21.0 m/s at an angle of 49° to the horizo..
Consider the transitions 3d -->2p in hydrogen. Calculate the possible energies of emitted photons, How many photon lines are there
A large, cylindrical roll of paper of initial radiusR lies on a long, horizontal surface. The outside end of thepaper is nailed to the surface. What is the speed of the center of mass of the roll
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