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1. A 200 lb metal object is suspended in a liquid with a specific gravity of 1.6. The metal object has a weight density of 150 lb/ft^3. If the object is only 3/4 submerged, what is the tension in the support cable?
2. A vertical cylinder is closed by a freely moving piston at its top. The piston has a mass of 5 kg and an area of 300cm^2. Atmospheric pressure is 1X10^5Pa. As the gas is heated, the piston rises 8cm. How much work did the gas do during the expansion?
3. A certain steam engine has an output of 500 hp and its efficiency in the use of fuel is 14%. It burns fuel oil that has a heat of combustion of 10,000 cal/g. How many kg of oil does the engine consume each hour?
A potential difference of 23.5 V is applied across a wire of cross-sectional area 4.0mm2 and length 1000km. What is the resistance of the wire
A very long solenoid with a circular cross section and radius r= 8.10 cm with n= 1.50E 4 turns/m has a magnetic energy density uB= 6.40 mJ/m3. What is the total energy stored in the solenoid
A 21.0 m tall hollow aluminum flagpole is equivalent in strength to a solid cylinder of aluminum 3.50 cm in diameter. How far to the side does the top of the pole flex
a street light is supported by two wires and each makes a different angle from each other. the one on the left is 32
An amusement park ride called the Rotor consists of a room in theshape of a vertical cylinder (1.98 m inradius) which, once the riders are inside, begins to rotate,forcing them to the wall.
A ball of mass 0.113 kg is dropped from a height of 1.92m above ground. The acceleration of gravity is 9.8m/s^2.Neglecting air resistance find the speed of the ball when it is at a height of 0.812 m above the ground. Answer in units of m/s.
It takes an elevator 2.4 minutes to raise a vehicle with a mass of 410 kg from the floor to a height of 6 meters. What size (power) motor (in watts) does it take to do the job?
a swimmer capable of swimming at a speed of 1.59 ms in still water i.e. the swimmer can swim with a speed of 1.59 ms
An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. What is the mass of this canister
question a radiation detector indicates the decay activity of a radioactive material. which would have a higher reading
A parachutist descending at a speed of 10.0 m/s loses a shoe at an altitude of 30.0 m. (Assume the positive direction is upward.). Explain when does the shoe reach the ground? What is the velocity of the shoe just before it hits the ground?
A 108m long train starts from rest (at t=0) and accelerates uniformly. At the same time (at t=0), a car moving with constant speed in the same direction reaches the back end of the train. find the cars speed and the trains acceleration
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