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In exercising, a weight lifter loses 0.145 kg of water through evaporation, the heat required to evaporate the water coming from the weight lifter's body. The work done in lifting weights is 1.21 x 105 J. (a) Assuming that the latent heat of vaporization of perspiration is 2.42 x 106 J/kg, find the change in the internal energy of the weight lifter. (b) Determine the minimum number of nutritional Calories of food that must be consumed to replace the loss of internal energy. (1 nutritional Calorie = 4186 J).
A 1.0-cm-diameter pipe widens to 2.0 cm, then narrows to 0.5 cm. Liquid flows through the first segment at a speed of 5.0 m/s. What is the speed in the third segment
A 1,576-kg car is moving down a road with a slope (grade) of 11% while slowing down at a rate of 3.6 m/s^2. find direction and magnitude of the frictional force
A bug starts at the origin of the xy coordinate system with an initial velocity of (2.2 + -0.4) m/s, What is the y position of the bug at t=2 seconds
After going through a bad break-up with your significant other you end up drinking half a case of beer. The next day you decide the cloud of despair must be fought with exercise. How much longer will it take you to burn off the calories of the bee..
Two identical piano wires have a fundamental frequency of 491 Hz when kept under the same tension. when both wires oscillate simultaneously
A velodrome track is banked so that a bicycle traveling at 43.5 km/h will have no tendency to slip to either side when traveling on the path that has a radius of curvature of 59.0 m
A block starts with a certain speed at the top of a frictionless inclined plane with an unknown angle to the horizontal. To calculate the time required for the block to reach the bottom of the plane.
A parallel-plate, air-gap capacitor has a capacitance of 0.15 ?F. The plates are 0.40 mm apart. What is the area of each plate
A cart of mass 6.8 kg is moving with a velocity of 15.2 m/s. It makes a head-on perfectly inelastic collision with a stationary cart B with mass 6.4 kg causing them to travel with the velocity 7.63 m/s. What is the velocity of cart B.
A parallel plate capacitor is make of two circular thin plates of radius 15 cm separated by 2.5 mm of a material with dielectric constant32. what is the charge resident on each plate
A 7.30 kg bowling ball strikes a 1.60 kg pin at rest head-on. What is the velocity of the pin after the collision
A long straight metal wire of radius r1= 3.30E-2 m is bounded by a metalic cylindrical shell of inner radius r2= 1.39 E-1 m and outer radius r3= 1.84E-1 m.
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