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An engine absorbs 1.72 kJ from a hot reservoir at 277°C and expels 1.24 kJ to a cold reservoir at 27°C in each cycle.
A) what is the engine efficiency?
B) how much work is done by the engine in each cycle?
C) what is the power output of the engine if each cycle lasts 0.303s?
A hunter aims directly at a target (on the same level) 150 m away. At what angle should the gun be aimed so as to hit the target
A cart with mass 200gmoving on a frictionless linear air track at an initial speed of 1.1m/sundergoes an elastic collision with an initially stationary cart of unknown mass. What is the speed of the two-cart center of mass
find the ratio of vb to vr, where vr is defined above and vb is the boats speed with respect to the water.
A lawnmower is pushed up a 13 degree hill. The lawnmower weighs 5000N. What is the magnitude and direction of the person pushing the lawnmower
A 65 kg hiker has fallen down a hole. One rescuer attaches a rope to the injured hiker and then a second rescuer pulls the injured hiker straight up out of the hole at a steady rate. How much force would the second rescuer need to exert on the rope t..
Light inside an optical fiber tube hits the wall between the tube and air and is totally internally reflected. what is the index of refraction of the tube
Two railroad cars, each of mass 7300 kg and traveling at 73 km/h, collide head on and come to rest. How much mechanical energy is lost in this collision
An aspiring physicist wants to build a scale model of a hydrogen atom for her science fair project. how big should she try to make the nucleus
A house at the bottom of a hill is fed by a full tank 5.0m deep and is connected to the house by a 110m long pipe at an angle of 58 degrees with horizontal. What is the gauge pressure at the house
What is frequency of the fork
q1. a certain metal with atomic mass 2.6 times 10-25kg has an interatomic bond with length 1.7 times 10-10 m and
The diagram on the left below shows two resistors in series with an ideal battery, in the diagram on the right; a third resistor has been added in parallel with R2. Calculating the resistance, current and potential difference.
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