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1. When a bow and arrow are cocked, a force is applied to the string to pull it back. Is the energy of the system increased? Explain.
Starting from rest with an acceleration of 0.37 m/s2, he covers the same distance as the ramp does, but in one-fourth the time. Illustrate what is the speed at which the belt of the ramp is moving?
A partly full paint can has 0.42 U.S. gallons of paint left in it. how thick is the layer of wet paint
A 70kg man walks out on a 10kg beam that rests on, but is not attached to, two supports. When beam just starts to tip, what is the force exerted on the beam by the right support.
A proton is released from rest at x = -3.00 cm in a uniform electric field of magnitude 1620 N/C, What is the change in potential energy when the proton reaches x = 5.00 cm
In a science fiction movie, a 100 g base ball travelling with a speed of 60 m/s and an electron travelling at a speed of 1.2 x 10^7 m/s, determine the momentum of the base ball
In 2.0 minutes, a ski lift raises six skiers at constant speed to a height of 175 m. The average mass of each skier is 65 kg. Illustrate what is the average power provided by the tension in the cable pulling the lift?
Sam, whose mass is 74 kg, straps on his skis and starts down a 67-m-high, 20 ^\circ frictionless slope. Find Sam's speed at the bottom using work and energy
a ball is thrown horizontally from a 20-m-high building with a speed of 5.0 m/s , Make a sketch of the balls trajectory
Calculate the numerical value of the capacitance of this capacitor after glycerin at 20?C completely fills the volume between the plates
The resistivity of copper at room temperature is 17 x 10^-9 m Ohms. What diameter of copper wire is required to give a copper wire 10 meters long a resistance of 2 x 10^-3 Ohms?
What is the charge on A so that the force on B is zero.
A ground state hydrogen atom absorbs a photon of light having a wavelength of 93.06 nm. What is the final state of the hydrogen atom
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