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A heat engine takes in 111 kJ of heat from a reservoir at 811 K and exhausts 83 kJ to a reservoir at 290 K.
(a) What is the efficiency of the engine?
(b) What is the efficiency of an ideal engine operating between the same two reservoirs?
A small ball rolls horizontally off the edge of a tabletop that is 1.20 m high. It strikes the floor at a point 1.76 m horizontally away from the edge of the table. What is its speed at the instant it leaves the table
A 4.00 kg object is attached to a spring and placed on a horizontal, smooth surface. A horizontal force of 15.0 N is required to hold the object at rest, Find the maximum acceleration of the object
q1. 1.76- block at rest on a ramp of height. while the block is released it slides without friction to the bottom of
Under certain conditions, the human body can withstand an acceleration of 10 g%u2019s. What is the net force (in Newtons) acting on a person
Design a response cost procedure for a 13 year old boy with a history of lying. Explain what makes response cost a negative punishment procedure.
A proton collides elastically with another proton that is initially at rest. The incoming proton has an initial speed of 4.60 105 m/s, Find the final speeds of the two electrons
Consider the motion of an apple and the Earth as the apple falls to the ground. If the apple begins at the top of a tree of height 11 m, Estimate the mass of an apple
A ball is thrown from the ground with a speed of 30m/s at an angle of 55 degree above the horizontal. If we neglect air resistance, How far from where it is thrown will the ball land
The resistor has a value of 10ohms, and the capacitor is 500uF. Calculate the time constant of the circuit. What is the voltage across the capacitor after the switch has been closed for one time constant
In order to view the craters of the Moon, you construct a refracting telescope from a lens with focal length 90.7 cm as its objective and a 11.5-cm focal length lens as its eyepiece
Find out the magnitude of the amount by which the potential difference across the plates changes.
A 3.1 kg dog stands on a 15.00 kg flatboat at distance D = 6.1 m from the shore. It walks 2.00 m along the boat toward shore and then stops. Assume no friction between the boat and the water, find how far the dog is then from the shore.
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