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A Carnot engine operates between the temperatures of850K and 300K. The engine performs 1200J of work each cycle andeach cycle takes 0.25s to complete.
What is the effciency of this engine?
What is the average power developed by this engine?
How much heat is extracted from the high temperature reservoirduring each cycle?
How much heat is delivered as waste heat to the lowtemperature reservoir during each cycle?
Someday in the future, an astronaut on Mars (where gMars = 3.71 m/s^2) might lean over the edge of 25.0-meter-tall spacecraft , What will be the package's speed when it strikes the ground
Suppose you have a near-point distance of 16 cm. The angular resolution of the eye is determined by diffraction, What is the smallest object your bare eye can resolve
A 295 Kg piano slides 4.1 m down a 30 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is .40.
When a light bulb is connected across the terminals of a battery, the battery delivers 20 W ofpower to the bulb. A voltage of 12.8 Vexists between the terminals of the battery, which has an internalresistance of 0.14 Ω. What is the emf of the battery..
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 2.80x 10^2 W electric immersion heater is used to heat a cup of water. The cup is made of glass and its mass is 3x10^2 g. It contains 250g of water at 15°C.
A boulder has a volume of 1 m3 and a mass of 5000 kg. what will be the effective mass of the boulder
Two stretched cables both experience the same stress. The first cable has a radius of 3.1 times 10-3 m, and is subject to a stretching force of 230 N. The radius of the second cable is 4.6 times 10-3 m. Determine the stretching force on the second ca..
A 58 kg skier is going down a 35 degree slope. The areaof each ski in contact with the snow is 0.3 m^2. Determine the pressure that each ski exerts on the snow
A 9.00 bullet has a speed of 1.10 km/s. What is the bullet's kinetic energy if its speed is halved, What is its kinetic energy in joules
A 30 g ball of clay traveling east at 2.0 m/s collides and sticks together with a 30 g ball of clay traveling north at 4.0 m/s. What is the speed of the resulting ball of clay
A worker drags a crate across a factory floor by pulling on a rope tied to the crate. Calculate the magnitude of the acceleration of the crate
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