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An engine with reservoir temperatures of 387 K and 725 K operates at half the efficiency of a Carnot engine. If the hot reservoir supplies the engine 4670 J of heat energy during each cycle, how much net work does the engine do in a cycle?
A 10.0-kg object experiences a drag force due to air resistance. At what velocity (magnitude and direction) is the net force on the object twice its weight
In addition, the snow exerts a retarding force on the sled that points opposite to direction of motion, and has a magnitude of 57 N. Find out the acceleration of the sled and child.
A glass sheet 1.40 ?m (micrometer) thick is suspended in air. In reflected light, there are gaps in the visible spectrum at 538 nm and 615.00 nm.
A source of AC voltage with a frequency of 60 Hz, Find the shortest time in seconds required for the voltage across the light bulb to reach 170 V
A Van de Graaff generator is used to demonstrate the effects of high potential. The device has a radius of 59.7 cm, How much charge does the dome hold at its maximum potential
At a certain time a model car's speed was 24 m/s in the positive x direction, What was the average acceleration of the car during this 8.0 s interval
a series RLC circuit has a resistance of 500 ohms, and inductance of 20.0 mH, and a capacitance of 2.00 uF. what is the peak current in this circuit
In the Blackhawk landslide in California, a mass of rock and mud fell 465 m down a mountain and then traveled 8.3 km across a level plain. How fast was it traveling when it reached the bottom
A 10.00 kg grocery is pushed 12.0 m along an aisle by a shopper who exerts a constant horizontal force of 40.0 N. a.) What work is done on the cart? b.)If all frictional forces are neglected, and the cart starts form rest, what is the grocery cart..
find the charge on the block. A very small charged block with a mass of 2.05g is placed on an insulated, frictionless plane inclined at an angle of 17° with respect to the horizontal.
A charge of -2.2×10-9 C is at the origin and a charge of 6×10-9 C is on the x-axis at x = 3m. At what two locations on x-axis (xpositive, xnegative) is the potential zero.
Throughout a hard sneeze, your eyes may shut for 0.44s. If you are driving a car at 98 km/h during such a sneeze, how far does the car move during that time.
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