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A steam power plant has, at the turbine entrance, saturated vapor with a pressure of 40 bar. The turbine exit is at 50 degrees C. The pump entrance is at 50 degrees C as well, and its exit is saturated liquid at 40 bar. The pump and turbine are isentropic. a) What is its thermal efficiency? b) At what rate is energy being given off by heat transfer to the cold thermal reservoir?
One beam so protons is moving with a speed close to speed of light, inside a magnetic field with a strength of 12T on z-direction. Calculate the magnetic force in vectorial form
You drive on Interstate 10 from San Antonio to Houston, half the time at 63 km/h and the other half at 86 km/h. What is your average speed for the entire trip
Aluminum wire has been used to replace copper wire during times of high copper prices. find the diameter of aluminum wire with same resistance
a coil has an inductance of l=0.65mh and resistance of r=0.75 ohms . it is connected to the terminals of a battery with a emf of 1.5V, find the final steady-state or equilibrium current
A person is standing at the edge of the water and looking out at the ocean. The height of the person's eyes above the water is h = 1.4 m, How far is it to the horizon
To test the deflection of the uniform 200-lb beam the 121-lb boy exerts a pull of 36 lb on the rope rigged. Calculate the force supported by the pin at the hinge O.
A block of mass m1= 0.50kg placed in top of another block of mass m2= 0.80 kg, which rests on a frictionless surface. A horizontal force of 2.0N is applied to the lower block. Find the acceleration of the system of two blocks
A long string carries a wave; a 4.00-m segment of the string contains four complete wavelengths and has a mass of 180 g. Determine the power being supplied to the string
Two identical blocks of mass m are connected by a cord of length l that runs over a massless frictionless pulley, as shown below. One mass sits on a frictionless horizontal table. Now suppose that the string has a total mass M, which is distributed u..
A 9 V battery is rated at 80 Ah. It can deliver a current of 80 A for one hour, or a current of 40 A for 2 hours, etc. What is the total energy stored in the battery
The lightbulb in the circuit shown in the figure(Figure 1) has a resistance of 14? and consumes 9.7W of power, find speed of the rod
Ocean waves are traveling to the east at 4.1 m/s with a distance of 18 m between crests. With what frequency do the waves hit the front of a boat when the boat is at anchor
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