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A mountain climber gains 897 m in elevation on a particular hike. Consider the climber's body as a heat engine, with heat for work provided by burning food (the "hot reservoir") and excess heat radiated into the mountain air (the "cold reservoir").
(a) If her mass is 62.3 kg, how much work does she do changing her gravitational potential energy?
(b) If she radiates 1.67×105 J of heat during the climb, and her internal energy doesn't change, how much heat does the food supply?
You have a wire of length L = 1.9 m for making a square coil of a dc motor. The current in the coil is I = 1.6 A, Find the maximum torque exerted on the coil
You want to take a full-length photo of your friend who is 1.94m tall, using a 35.0mm camera having a 50.0mm lens, How far is the lens from the film
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an object of mass m=3.1g and charge q=+48 is attached to a string, find the magnitude of the electric field and the tension in the string
Two long parallel wires each with a mass per unit length of 25.10 g/m are supported in a horizontal plane by 2.5 cm long strings. Each wire carries the same current, I, causing the wires to repel each other so that the angle between supporting string..
A series RLC circuit has a resistance of 80? , an inductance of 0.48H , and a capacitance of 3.0, f= 130Hz. What is the impedance at that frequency??F
As you travel every day to campus, the road makes a large turn thatis approximately an arc of a circle. What is the maximum safe speed forthe turn when the road is wet
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The tractor beam exerts a constant force of 4.0 104 N on the shuttlecraft. Both spacecraft are initially at rest. Explain how far does the starship move as it pulls the shuttlecraft aboard?
Find out , the magnitude of the force each plate experiences due to the other plate as a function of , the potential drop across the capacitor.
Along a straight road through town, there are three speed-limit signs. They occur in the following order: 54 , 35 , and 18 mi/h, with the 35 -mi/h sign located midway between the other two.
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