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A heat engine runs in the cycle A to B to C and back to A. The pressure at C is 200 kPa. The volume at C is 20 liters. The temperature at C is T K. The pressure at A is twice that at C. The volume at B is twice that at C. The internal energy at A and B are both 1.2×104 J. The internal energy at C is 6000 J a)What is the work done in the transition A to B? b)What is the work done in the transition B to C? c)What is the TOTAL heat going into the gas during the cycle? d)What is the total work done during the cycle? e)What is the efficiency of this heat engine? f)What is the efficiency of a Carnot cycle running between the lowest and highest temperatures of the cycle ABC?
Find out the speed of a 56.7 kg thrill seeker at the bottom of the slide, assume no friction. If the thrill seeker has a speed of 24.1 m/s at the bottom, find out the change in mechanical energy due to friction.
An 8.m, 220 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.75, and the ladder makes a 50° angle with the ground. How far up the ladder can an 770 N person climb before the la..
How many 104W lightbulbs can you use in a 113 V circuit without tripping a 17 A circuit breaker? (The bulbs are connected in parallel that means that the potential difference across each lightbulb is 113V.)
A 200 g block hangs from a spring with spring constant 10 N/m. At t=0 s the block is 23 cm below the equilibrium point and moving upward with the speed of 125 cm/s. What are block's oscillation frequency? What is the block's distance from equilibri..
find the arrow's initial speed? How long did it take for the arrow to first reach a height of 17.5 m above its launch point.
A potter's wheel having a radius 0.450m and a moment of inertia 15 kg•m2 is rotating freely at 45 rev/min. The potter can stop the wheel in 7.50 s by pressing a wet rag against the rim and exerting a radically inward force of 68 N.
A paratrooper pilot fell 360 m after jumping without his parachute opening. He landed in a snow bank, creating a crater 1.50 m deep, but survived with only minor injuries. Assume the pilot's mass was 80 kg and his terminal velocity was 50 m/s.
A fire in an enclosure has reached flashover, & the gas temperature is assumed to be uniform at 1000oC. The enclosure has an opening 3 m wide & 2 m high. Find the position of the neutral layer, measured from the bottom of the opening.
In one design, a large spring with spring constant 2×10^4 N/m was placed behind the cannon. The other end of the spring braced against a post that was firmly anchored to ship's frame.
Two magnetic air pucks are approaching each other for a glancing blow. This time one of the pucks will have an additional mass (lead collar). estimate the mass of the collar if the mass of the puck itself is 0.199 kg and the mass of the second puck..
Estimate, from these data, the effective distance between the atoms.
Describe briefly a current health problem. A father racing his son has half the kinetic energy of the son, who has one-third the mass of the father. The father speeds up by 2.5 m/s and then has the same kinetic energy as the son.
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