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Work of 1500 J is done on an ideal gas, but the internal energy increases by only 800 J. What is the amount and direction of heat flow into or out of the system?
A light platform is suspended from the ceiling by a spring. A student with a mass of 74 kg climbs onto the platform. At what time does the maximum speed occur
A converging lens of focal lenght 0.184 m forms a virtualimage of an object. What is the distancebetween the object and the lens
A beam of unpolarised light with a power of 70 mW is passed through two polarisers in series, with their polarisation directions parallel to each other. What is the maximum power that can be transmitted through the two
a solenoid has a length of 30 cm a diameter of 2 cm and containsa total of 10000 turns if it carries a current of 5a.
Consider two particles with masses that differ by a factor of 325. what is the ratio of their kinetic energies
Expalin by how much does the potential energy of a 18.0-kg child increase when the child climbs a normal staircase to the second floor?
A rifle with a weight of 20 N fires a 3.5-g bullet with a speed of 250 m/s. (a) Find the recoil speed of the rifle. Incorrect: Your answer is incorrect. Your response differs from the correct answer by more than 10%. Double check your calculations. m..
A performer, seated on a trapeze, is swinging back and forth with a period of 9.95 s. what will be the new period of the system
10.0g of aluminum at 200?C and 22.0g of copper are dropped into 42.0cm3 of ethyl alcohol at 15?C. What was the initial temperature of the copper
A net torque of 36N*m acts on a wheel rotating about a fixed axis for 6 s. During this time the angular speed of the wheel increases from 0 to 12 rad/s. What is the magnitude of the frictional torque
Which physical parameter, more than any other, most probably controlled the early evolution of the planetary system and dictated the characteristics of the planets that eventually formed?
An 80.6 kgastronaut is working on the engines of his ship, which is driftingthrough space with a constant velocity. how long does it take the astronaut to reach the ship
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