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A 0.144 kg baseball leaves a pitcher's hand at a speed of 22.5 m/s. If air drag is negligible, how much work has the pitcher done on the ball by throwing it?
The particle then begins to move. Find out the speed of the alpha particle after it has moved through a potential difference of −3.45×10−3 V.
A researcher observes hydrogen emitting photons of energy 2.55eV. What are the quantum numbers of the two states involved in the transition that emits these photons
A life preserver made of Styrofoam is designed to support a person weighing 575 N, Find the volume of Styrofoam required if the body's volume is 0.0503 m^3
Electrons emitted by the photoelectric effect are accelerated and then strike a phosphorescent screen, causing it to glow more brightly than the original scene.
Suppose that the rod is held at rest horizontally and then released. What is the angular acceleration of the rod immediately after it is released
In some places, insect "zappers," with their blue lights, are a familiar sight on a summer's night. how many turns are in the secondary coil
A box of books weighing 327 N is shoved across the floor by a force of 471 N exerted downward at an angle of 35° below the horizontalIf μk between box and floor is 0.52, how long does it take to move the box 4.80 m starting from rest.
A three-picket fence (mass = 406 grams) on a glider is pulled by a constant force along a horizontal frictionless surface. Find the magnitude of the constant force in Newtons
Three identical metal spheres are charged so that sphere A has a charge of 220 ?C, sphere B has a charge of -370 ?C, What is the final charge on each sphere
One possibility for a low-pollution automobile is for it to use energy stored in a heavy rotating flywheel. What is the angular velocity of the flywheel when it has a full "energy charge"
A 1.20 kg mass is attached to a light cord that is wrapped around a pulley of radius 3.65 cm, which turns with negligible friction. Find the moment of inertia of the pulley
Two particles of masses m1 and m2 are joined by a massless spring of natural length L and force constant k. Find the positions of the two masses at any subsequent time t
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