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In 2.0 minutes, a ski lift raises 5 skiers at constant speed to a height of 140 m. The average mass of each skier is 65 kg. What is the average power provided by the tension in the cable pulling the lift?
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A thermodynamic system undergoes a process in which its internal energy decreases by 455 J. Find the energy transferred from it by heat
A 34 kg child on a swing 6,9 meters long is released from rest when the swing supports make an angle of 38,9 degrees with the vertical. Neglecting friction, find out the child's speed (m/s) at the lowest position to two decimal places. Use 9,8 m/s..
An elementary particle of mass M completely absorbs a photon, after which its mass is 1.01M. (a) What was the energy of the incoming photon (b) Why is that energy greater than 0.01Mc^2
A 1.0cm * 1.0cm parallel-plate capacitor has a 2.0mm spacing. The electric field strength inside the capacitor is 1.3*10^5 V/m, What is the potential difference across the capacitor
A 43 kg girl and an 8.4 kg sled are on the frictionless ice of a frozen lake, 17 m apart but connected by a rope of negligible mass. What is the acceleration of the girl
A train moving with constant velocity travels 190 north in 14s and an undetermined distance to the west. How far west has the train traveled
A bowling ball encounters a 0.76 m vertical rise on the way back to the ball rack, as the drawing illustrates. find the translational speed at the top
A 668-kg elevator starts from rest and moves upward for 4.30 s with constant acceleration until it reaches its cruising speed, 1.65m/s. What is the average power of the elevator motor
A machine componant is subjected to the forces and couples shown. The componant is to be held in place by a single rivet that can resist a force but not a couple. determiune the location of the rivet hole
To save on heating costs, the owner of a green house keeps 680 kg of water around in barrels. What is the minimum ampere rating of an electric heating system (240 V) that would provide the same heating effect as the water does
Quadrupole moments in the shell model
A block of mass m = 2.5 kg rests on a frictionless floor. It is attached to a spring with a relaxed length L = 6 m. By what amount is the spring extended
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