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When a light bulb is connected across the terminals of a battery, the battery delivers 20.6 W of power to the bulb. A voltage of 10.4V exists between the terminals of the battery, which has aninternal resistance of 0.406. What is the emf of the battery?
An electric motor with a power of 3W is used to lift a .2 kg mass a height of 0.5 meters in 3.0 seconds, since total energy must be conserved
You swing a 2.80 stone in a circle, using the full length of a thin 60.0 rope. At what speed should you swing it so its acceleration will be 9.8
The length of a simple pendulum is 0.72 m and the mass of the particle (the "bob") at the end of the cable is 0.27 kg. What is the angular frequency of the motion
Two blocks of masses m1 = 1.90 kg and m2 = 5.18 kg are each released from rest at a height of h = 5.15 m on a frictionless track, find the maximum height to which m1 rises after the collision
A carbon sample of the same size taken from a fresh piece of bone emits 16 beta emissions a minute. How long ago did the saber-tooth tiger live?
The masses of the earth and moon are 5.98 × 1024 and 7.35 × 1022 kg, respectively. find the magnitude of the charge placed on each body
An electron is in the fifth Bohr orbit of hydrogen. Calculate the time required for the electron to circle the nucleus
The coil of a generator has a radius of 0.16 m. When this coil is unwound, the wire from which it is made has a length of 5.8 m. What is the peak emf of this generator
A luge and its rider, with a total mass of 83kg, emerge from a downhill track onto a horizontal straight track with an initial speed of 44m/s. Assume that they stop with the constant deceleration of 2.9 m/s2.
A bungee jumper has a mass of 68 kg. If he jumps off a bridge that is 200. m high and uses a bungee cord that is 75 m long with a spring constant of 20. N/m
A student sits on a freely rotating stool holding two weights, each of mass 2.90 kg. When his arms are extended horizontally, Find the new angular speed of the student
Assume that the balloon rises slowly so that the temperature inside is the same as outside. Illustrate what will happen if the balloon is made up of rigid material?
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