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An electrical generating plant operates a boiler at a temperature of 220 C and exhausts the unused heat into a nearby river at 18 C. What is the maximum theoretical efficency of the plant? (0 C - 273 K )
_________%
The 9 inch long elephant nose fish in the Congo River generates a weak electric field around its body using an organ in its tail. How many electrons would be required to create that charge
A highway is to be built between two towns, one of which lies 50.0 km south and 82.0 km west of the other. find at what angle would this highway be directed
Consider a parallel-plate capacitor with .30m by .50m-rectangular plates separated from eachother by .010mm. this capacitor has a capacitance of 280nF, find the dielectric constant of this capacitor
A house sits in a valley and is 30 m lower than the water tower that serves it. What is the speed of water when it sprays out of a shower in the house?
A 1000 kg aircraft going 25 m/s collides with a 1500 kg aircraft that is parked and they stick together after the collision and are going 10 m/s after the collision
A wave has an angular frequency of 110 rad/s and a wavelength of 1.80 m. Calculate the angular wave number and the speed of the wave.
A box is pushed across the floor, slide with a constant velocity, and is opposed by a friction force of 25N. What is the magnitude of the force? Choose the correct answer. A.Less than 25N B.Zero C.Greater than 25N D.25n
With what minimum speed must you toss a 170g ball straight up to just touch the 12-m-high roof of the gymnasium, With what speed does the ball hit the ground
A uniform soda can of mass 0.138-kg is 11.80-cm tall and filled with 1.30-kg of soda. Then small holes are drilled in the top and bottom (with negligible loss of metal) to drain soda. (Initially the soda can is full.)
Two forces parallel to the x axis do 19.0 J of work on a small tray while moving it 17.6 m in the x direction across a gym floor, What is the other force
During heavy rain, a rectangular section of a mountainside measuring 2.8 km horizontally, 0.80 km up along the slope, What is the mass of the mud sitting above an area of 4.0 m2 in that section
For a spring-mass oscillator, if you triple the mass but keep the stiffness the same, what numerical factor does the period change? That is, if an original period was T and the new period is bT, what is b? It is useful to write out the expression ..
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