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Three moles of an ideal monatomic gas are at a temperature of 393 K. Then 2568 J of heat is added to the gas, and 631 J of work is done on it. What is the final temperature of the gas?
The intensity (in W/m2) of one sound is 7.12 times as great as the intensity of another sound. Relative to the quieter sound
Four point charges have the same magnitude of 2.57 10-12 C and are fixed to the corners of a square that is 4.20 cm on a side. Determine the magnitude of the net electric field that exists at the center of the square
q1. all through its evolution a star of 1 solar mass the mass of our sun expands to 3.33 times its original radius.
A sledge loaded with bricks has a total mass of 18.1 kg and is pulled at constant speed by a rope inclined at 20.8° above the horizontal. What is the mechanical energy lost due to friction
In a serve, a tennis player hits the ball horizontally. Neglect the effects of air resistance and the diameter of the ball. Where will the ball land if it just clears the net
A steady beam of alpha particles (q = + 2e, mass m = 6.68 x 10-27 kg) traveling with constant kinetic energy 26 MeV carries a current of 0.34 µA. If the beam is directed perpendicular to a flat surface, how many alpha particles strike the surface i..
A proton takes 99.0 usto complete one orbit around a 14.5 m diameter cyclotron. What's the cyclotron's magnetic field
A certain lightbulb filament when hot has a resistance of205 %u03A9. What current is flowing through the bulb at that time
A cell phone transmits at a frequency of 1.28 108 Hz. What is the wavelength of the electromagnetic wave used by this phone
A uniform bridge span weighs 50.0x103 N and is 40mlong. A car weighing 15.0 x103 N is parked withits center of gravity located 12m from the right pier. What upward force does the left pier supply
The emissivity of the human skin is 97.0 percent. Use 35.0 °C for the skin temperature and approximate the human body by a rectangular block with a height of 1.58 m, Calculate the power emitted by the human body
A down jacket has a surface area of 0.87 m2 and is filled with a 4.4 cm thick layer of down, At what rate is heat conducted through the coat
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