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The surface waters of tropical oceans are at a temperature of 28C while water at a depth of 1200 m is at 3C. It has been suggested these warm and cold waters could be the heat reservoirs for a heat engine, allowing us to do work or generate electricity from the thermal energy of the ocean.
What is the maximum efficiency possible of such a heat engine?
A coin slides over a frictionless plane and across an xy coordinate system from the origin to a point with xy coordinates (3.94 m, 5.13 m) while a constant force acts on it. How much work is done by the force on the coin during the displacement
The electric potential at a position located a distance of 21.0 mm from a positive point charge of 6.90×10-9C, Calculate the value of the second charge
A wooder raft has mass of 76kg. When empty it floats in water (density 1000 kg/m^3) with 40% of its volume submerged
a long horizontal wire carries a current of 48 amps. A second wire, made of 2.5 mm diameter copper wire and parallel to the first, is kept in suspension magnetically 15 cm below. Determine the magnitude and direction of the current in the lower wi..
A parallel plate capacitor has square plates with sides of length 10 cm. The distance between the plates is 4 mm. What is the amount of charge on each plate
A 15-g sample of the candy is placed in a small aluminum container of mass 0.325 kg filled with oxygen. Determine the Calorie content of 69g of candy
A baseball pitcher throws a fastball at a speed of 45.00m/s. The acceleration occurs as the pitcher holds the ball in his hand and moves it throughout an almost straight-line distance of 4.0 m. compute the acceleration; assume that it is constant ..
A rectangular air mattress is 2.10m long, 0.48m wide and 0.09 m thick. If it has a mass of 2.30 kg, what additional mass can it support in water.
In a classic carnival ride, patrons stand against the wall in a cylindrically shaped room. If a new person with mass 94.0 kg rides the ride, what minimum coefficient of friction between the wall and the person would be needed
A hunter who is a bit of a braggart claims that, from a distance of 1.5 km, he can selectively shoot either of two squirrels who are sitting 14 cm apart on the same branch of a tree. Determine the diameter of the pupils of his eyes
Oil is being loaded into a barge through a 150 mm diameter pipe whose exit is at an angle ? = 60? to the horizontal. Determine the force exerted by the barge on the rope
research and briefly identify the energy conservation measures that reduce a buildings energy use by reducing one or
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