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The work done by an engine equals one-half the energy it expels to a cooler at 0C. Find the efficiency of this engine. If this engine is close to ideal, what is the temperature of the heater?
A Venturi meter is a device for measuring the speed of a fluid within a pipe. The drawing shows a gas flowing at speed v2, find the volume flow rate Q of the gas
Water flows at 5.0;{rm L}/{rm s} through a horizontal pipe that narrows smoothly from 10 cm diameter to 5.0 cm diameter. A pressure gauge in the narrow section reads 50 kPa. What does the other pressure gauge read.
what is the magnitude of its velocity after the collision. A soccer player applies a force of 60.5 N to a soccer ball while kicking it. If the ball has a mass of 0.42kg, what is the acceleration of the soccer ball.
How many electrons should be transferred from the plate. When you enter your answer, leave off the unit rm dB.
A centrifuge in a medical laboratory rotates at an angular speed of 3800 rev/min. Find the constant angular acceleration of the centrifuge
A 15.0 kg block of ice at 0 degrees C falls into Lake Superior, which is a freshwater lake. What is the change in entropy, delta S, of the lake
A boy coasts down a hill on a sled, reaching a level surface at the bottom with the speed of 8.4 m/s. If the coefficient of friction between sled's runners and snow is 0.040.
A grindstone of radius 4 m is initially spinning with an angular speed of 8 rad/s. The angular speed is then increased to 10 rad/s over the next 4 seconds. Imagine that the angular acceleration is constant.
what volume should the balloon have after being inflated. Billiard ball A of mass mA=0.400kg moving with speed vA=1.80m/s strikes ball B, initially at rest of mass mB=0.500kg. As a result of collision, ball A is deflected off at an angle of 30.0 deg..
An electron initially at rest moves from one plate of a capacitor to another, through a potential di?erence of 2476 V, Find the speed with which the electron strikes the positive plate
Calculate the size of the average force. plan the force vectors with their tails at the left sphere
A car of mass 960 travels at a speed of 30 along the straight road. The driver sees a red traffic light ahead, and applies brakes. The coefficient of friction between the car tyres and the road is 0.88. Take the acceleration due to gravity to be 9.80..
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