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Consider two actual power plants operating with solar energy. Energy is supplied to one plant from a solar pond at 80°C and to the other from concentrating collectors that raise the water temperature to 600°C. Which of these power plants will have a higher efficiency? Explain.
An automobile weighing 2500 lbf increases its gravitational potential energy by 2.25x10^4 Btu in going from an elevation of 5183 ft in Denver to the highest elevation on Trail Ridge Road in the Rocky Mountains. What is the elevation at the high point..
a car tows a 400kg block up a 45 degree incline. the coefficients of static and kinetic friction are 0.6 and 0.4. the
an outdoor track is 420 ft in diameter. a runner increases her speed at a constant rate from 14 to 24 fts over a
canon at an angle 30 degree tube is rotating at an axes with anguar velocities w1 and w2 2 and 5 rad/s and tube blows a ball at b with constant rate 7 m/s . what is velocity and acceleration of ball at tube end ball is at distance of 3m from tube ..
what horsepower must be supplied to a pump that operates at an efficiency of 75 to the flow if water t25degc is pumped
water backs up behind a concrete dam as shown. leakage under the foundation gives a pressure distribution under the dam
all makers of beverages such as breweries wineries and soda makers must wash bottles before filling. a new beverage
current automotive air conditioners use r134a as a working fluid. assume an evaporator temperature of 0c in practice
an apparatus for measuring thermal conductivity employs an electrical heater sand- wiched between two identical samples
the rate of heat transfer to the surroundings from a person at rest is about 400 kj per hour. suppose that the
a rankine cycle steam plant operates between the pressures of 15 mpa and 6 kpa. steam exiting the boiler is 550 degrees
a gate in the shape of a quarter-cylinder hinged at a and sealed at b is 3 m wide. determine the horizontal and
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