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Five thousand joules of heat is put into a Carnot engine whose hot and cold reservoirs have temperatures of 480 and 320 K, correspondingly. How much heat is converted into work?
A home run is hit in such a way that the baseball just clears a wall 21 m high, located 130 m from home plate. Find the time it takes the ball to reach the wall
When its coil rotates at a frequency of 230 Hz, a certain generatorhas a peak emf of 86 V. (a) What is the peak emfof the generator when its coil rotates at a frequency of 34 Hz?(b) Determine the frequency of the coil's rotation when the peak emf of ..
Two long, parallel wires separated by 3.00 cm carry currents in opposite directions. The current in one wire is 1.20 A, Is the force attractive or repulsive
A terrestrial telescope uses an objective and eyepiece with focal lengths of 42cm and 6.0cm, respectively. find the magnification of the telescope for an object at infinity
find the volume of the irregularly shaped object. What is sigma_inner, the surface charge density (charge per unit area) on the inner surface of the conducting shell.
A 3.0 kg mass is attached to a vertical spring hanging from the ceiling. The spring and mass are stationary. The spring constant for the spring is 250 N/m. What is the gravitational potential energy of the system
Two 4.0 X 4.0 square aluminum electrodes, spaced 0.80 apart are connected to a 100battery. What is the charge on the positive electrode
The pixel coordinates of the two ends of a ruler on your digital photograph are Xtop = 951, Xbottom = 943 AND Ytop = 7, Ybottom = 2781. What is the length of the ruler in pixels
Two masses are connected by a string. Mass A is on a flat roof and mass B is hanging over the edge of the roof. The mass on the roof is 15 kg and the hanging mass is 5 kg, how far along the roof does this mass move before stopping (the masses are s..
a ball is shot from the ground into the air. at a height of 10.20 m the velocity is observed to be v 8.50 ms i 7.10
You cool a 130.0g slug of red-hot iron (temperature 745 ?C) by dropping it into an insulated cup of negligible mass containing 70.0g of water at 20.0 ?C. what is the final mass of the iron and the remaining water
What is the kinetic energy of a carbon atom moving with a speed of 500 m/s.
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