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Converting sunlight to electricity with solar cells has an efficiency of 15%. It's possible to achieve a higher efficiency (though currently at higher cost) by using concentrated sunlight as the hot reservoir of a heat engine. Each dish in the figure concentrates sunlight on one side of a heat engine, producing a hot-reservoir temperature of 500 . The cold reservoir, ambient air, is approximately 30. The actual working efficiency of this device is 30%. What is the theoretical maximum efficiency?
A rocket of mass 3.95 × 105 kg is in flight near earth's surface. Its thrust is directed at an angle of 54.7° above the horizontal, compute the direction of the rocket's acceleration
A solenoid 90.0 cm long has a radius of 2.90 cm and a winding of 1000 turns; it carries a current of 3.60 A. Calculate the magnitude of the magnetic field inside the solenoid
Illustrate what are these accounting shenanigans? Briefly explain each. Do internet research to answer the question.
A small block with mass 0.0475kg slides in a vertical circle of radius 0.0710m on the inside of a circular track. What is the magnitude of the normal force that the track exerts on the block when it is at the top of its path
8 equal drops of water are falling through air with a steady velocity of 10 cm/s. then the terminal velocity of the big drop is
A long wire on the x-axis carries 25 A of current to the right. A rectangular loop (0.70 m wide and 0.80 m height) of 36 gauge copper wire in the x-y plane begins with its center at a location of 0.45 meters directly above the wire. The loop moves..
q1. a wave on a slinky has a frequency of 1.69 hz. it takes 4.1 s to travel the length of the slinky 0.29 m. what is
what is the buoyant force on a beachball of diameter 20.0 cm that is HALF submerged in a fresh water pool
Using Newton's Version of Kepler's Third Law II Part A Pluto's moon Charon orbits Pluto every 6.4 days with a semimajor axis of 19,700 kilometers. Calculate the combined mass of Pluto and Charon
Baseball and the Washington Monument On August 25, 1894, What was the ball's direction of motion when caught? answer in degree
While driving on the freeway at 110 km/h, you pass a truck whose total length you estimate at 25 m. A. If it takes you, in the driver's seat, 6.0s to pass from the rear of the truck to its front, what is the truck's speed relative to the road? ..
Whole blood has a surface tension of 0.068 N/M & a density of 1050kgm-3.what weight can whole blood rise in a capillary blood vessel that has radius 2.0 x 10-6 if the contact is zero.
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