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With each cycle, a 2510-W engine extracts 2070 J from a thermal reservoir at 90 °C and expels 1340 J into a thermal reservoir at 20 °C. What is the work done for each cycle? What is the engine's efficiency? (Be sure to enter your answer in decimal format and not as a percent.) How much time does each cycle take?
Two charged pith balls are suspended on very light 10.7 cm strings. Each has a mass 11.0 g. In stability, the total angle between the strings is 37 degrees. Draw the free body diagram for one of the pith balls and clearly label all forces with magnit..
An open-topped freight car with mass 24000 is coasting without friction along a level track. Since the rain is falling downward, how is it able to affect the horizontal motion of the car
The cable below supports a unoformly distributed load. The max tension that the cable can withstand is 41 x 10^6 N, What minimum length of cable is needed
A 61 kg speed skater with the velocity of 16 m/s comes into a curve of 18 m radius. How much friction should be exerted between skates and ice to negotiate the curve.
Analog data having highest harmonic at 30 kHz generated by a sensor has been digitized using 6 level PCM
A m = 3 kg steel ball strikes a wall with a speed of v = 10 m/s at an angle of ?i = 60? with the surface. Determine the impulse given to the ball
A startled armadillo leaps upward, rising 0.575 m in the first 0.195 s. What is its initial speed as it leaves the ground
You're carrying a 3.40 m-long, 23 poles to a construction site when you decide to stop for a rest. You place one end of the pole on a fence post and hold the other end of the pole 35 from its tip.
You are on a roof, 14.0 m above ground. Dr singer who is 1.78 m tall is 5.0m from the building entrance. How long is the egg in the air
Two charges Q1 = 48 muC and Q2 = 88 muC are found to have a potential energy of 43 J . What is the distance between the charges?
A satellite is in a circular orbit around and unknown planet. The satellite has a speed of 1.70 x10^4 m/s, and the radius of the orbit is 5.25 x106m. What is the orbital speed of the second satellite
A model airplane of mass 0.870 kg is flying at constant speed in a horizontal circle at one end of a 28.0 m cord and at a height of 17.0 m. What is the acceleration of the plane
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