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A heat engine makes use of 785 kJ of heat to produce 245kJ of work. It operates at a temperature of 285 oC It exhausts heat to the 22.5 oC atmosphere. What is its ideal efficiency and its actual efficiency Why are these two quantities so different?
Aspherical volume charge distribution rv = ro [1 - (r2/b2)] existsin the region 0
The oscillations of an actual spring-block system slowly reduce in amplitude and finally the system comes to a halt. What happens to the energy of the system
A child is riding across a rough field on a sled. Together, she and the sled have a mass of 73 kg. The sled is being pulled by her brother at an angle of 16º with a force of 356 Newtons. What is her acceleration if the coefficient of kinetic friction..
at what rate must the potential difference increase across a 1.50 u f capacitor to create a 0.900 a displacement
A parallel plate capacitor is composed of two square plates, 13.5 cm on a side, separated by an air gap of 0.80 mm, Find the new energy stored in the capacitor
A rubber ball is dropped from a distance of 1.40 m above ground and bounces to 60% of its original height. how long is the ball in contact with the ground
A spaceship of mass 1.90×10^6 kg is cruising at a speed of 4.50×10^6 m/s when the antimatter reactor fails, blowing the ship into three pieces. What is the speed of the third piece
a helicopter moves in such a way that its position at any time is described by the horizontal and vertical equations x
A certain string can withstand a maximum tension of 36 N without breaking. What is the speed of the stone as the string breaks
Regarding the Earth and a cloud layer 800 m above the Earth as the "plates" of a capacitor, calculate the capacitance of the Earth-cloud layer system. What is the maximum charge the cloud can hold
the center of a 1.50km diameter spherical pocket of oil is 1.50km beneath the earths surface. estimate by what
Suppose a 1.5 kg watermelon is hung from a string. A bolt with a mass of 30 grams is shot into the watermelon. Find the speed of the watermelon immediately after the arrow exits
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