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1. A Carnot heat engine takes 2000J of heat from the high temperature reservoir at 227 degrees Celsius, does some work and discards heat into the low temperature reservoir at 77 degrees Celsius. What is the Carnot efficiency? How much work does the engine do and how much heat is discarded?
Find the potential 1.18 cm from a proton. The Coulomb constant is 8.9876 × 10^9 N m^2/C^2 and the elemental charge is 1.602 × 10^?19 C
Find the magnitude of , the acceleration of the car after the brakes are applied. Express your answer in terms of some or all of the variables d, t, and v.
while Jo moves off in the opposite direction at a speed of 0.946m/s. assuming that friction is negligible, find out Al's mass.
The work done by an engine equals one-half the energy it expels to a cooler at 0C. what is the temperature of the heater
Three moles of an ideal monatomic gas are at a temperature of 340 K. Then 2701 J of heat is added to the gas, What is the final temperature of the gas
A parallel-plate capacitor is formed of two 10 cm x10 cm plates spaced 1.0 cm apart, What is the slowest speed the electron can have if it is to reach the negative plate
A street lamp weight 164N. It is supported equally by two wires that form an angle of 129 degrees with each other. What is the tension of each of these wires.
Some space invaders build a giant gun on the surface of their planet. What must the muzzle velocity for the projectile to escape the planet's gravitation when fired perpendicular to the horizon
When 4425 J of heat are added to a 0.16-m-long silver bar, What is the mass of the bar
What is the total power of Sunlight that is absorbed by the disk? The disk reradiates this power back to outer space as infrared light
A plane flies from base camp to Lake A, 280 km away in the direction 20° north of east. After dropping off supplies it flies to Lake B that is 190 km at 30° west of north from Lake A. Graphically find out the distance and direction from Lake B to ..
A potter's wheel having a radius 0.55m and a moment of inertia 12kg•m2 is rotating freely at 51 rev/min. The potter can stop the wheel in 7 s by pressing a wet rag against the rim and exerting a radially inward force of 67N. Find out the effectual co..
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