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A heat engine that operates on a Carnot cycle uses a low-temperature reservoir at 25 oC and runs at an efficiency of 0.350. The working substance is nitrogen gas, and the gas chamber contains 7.10 x 1023 N2 molecules.
What is the change in the thermal energy of the N2 gas between its lowest and highest temperatures?
An auditorium of size 40m x 20m x 8m has 600 people init. The temperature of the air is 27oC. Obtain how many moles of air are there in auditorium
An object is located 15 cm in front of (to the left of) a converging lens with a focal length of 10 cm. To the right of the converging lens, What is the location of the final image
A spherical asteroid has a radius of 545 km and a surface g of 3.0 m/s2. What is the mass of the asteroid, What is the potential energy of a 1 kg object on the surface
A 35kg child slides down a playground slide at aconstant speed, The slide has a height of 4.0mand is 7.4m long, find the magnitude of the kinetic friction force acting on the child
A wedge of air is formed between two glass plates that are 9.0 cm long, with one edge touching, How far apart are the maxima for the reflected light with ? = 665 nm
What is the rotational kinetic energy of the earth due to its rotation about its own axis
a Hydrogen atom is in the gound state. it absorbs some energy, leaving the atom in an excited state, calculate the wavelength of the second photon
a 2.73 kg wood block is launched up a wooden ramp that is inclined at a 30deg angle. the blocks initial speed is 10.15
A toroid having a square cross section, 1.00 cm on a side, and an inner radius of 17.0 cm has 550 turns and carries a current of 0.500 A. (It is made up of a square solenoid bent into a doughnut shape.) What is the magnitude of the magnetic field ins..
a 2.70 microf capacitor is charged by a 20.0 v battery. it is disconnected from the battery and then connected to an
A tourist takes his 27.0 W, 120 V AC razor to Europe, finds a special adapter, and plugs it into 225 V AC. Assuming constant resistance. What power does the razor consume as it is ruined
a 1.40 block is attached to a spring with spring constant 18.0 . while the block is sitting at rest a student hits it
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