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A piece of steel piano wire is 1.60 m long and has a diameter of 0.26 cm. What is the magnitude of the tension required to break it? The strength of steel is 5.0 x 108 N/m2.
A series RL circuit containing a 0.230 H inductor has a time constant of 0.220 second. Determine what is the resistance in the circuit
A spring loaded toy is used to shoot a 3g ping pong ball straight up against air. What is the work done by air resistance
A boat takes 3.2 hours to travel 28.01 km down a river, then 5.5hours to return. How fast is the river flowing
projectile motion horizontal only1. a rifle is fired horizontally 9 meters above the ground. the bullets velocity is
Ultrasound is the name given to frequencies above the human range of hearing, which is about 20000 Hz. What frequency is required
The rules of tennis specify that the .057-kg ball must bounce to a height of between 53 and 58 inches when dropped from a height of 100 inches onto a concrete slab. What is the change in the momentum of the ball
A strip of doped silicon 325 µm wide contains 9.6 1022 conduction electrons per cubic meter and an insignificant number of holes, What is the thickness of the strip
a boy pulls a 20 -kg box with a 50- N force at 37( degree)above a horizontal surface. what is the work done by the frictional force
A diving bell with interior air pressure equal to atmospheric pressure is submerged in Lake Michigan. At what depth is the diving bell
1000 kg of seawater at 17.5 C and salinity of 3 percent is mixed with 500 kg of pure water with initial temperature 5 C, Determine the final temp C and salinity % of the mixture?
You exert a force of 21 N on the head of a thumbtack. The head of the thumbtack has a radius of 5 mm. What is the pressure on your thumb
A irregular piece of metal has a dry mass of 5.7 kg. Once it is submerged it has an apparent mass of 2.4 kg. What is the density of the piece of metal
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