A closed piston-cylinder with air expands and does 2000

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A closed piston-cylinder with air expands and does 2000 ft-lbs of work. Heat is added in the amount of 4 btu. What is the change in internal Energy.

The distance between the slits and the screen is two meters : a laser light has a wavelength of 670 nanometers and the separation between the two first order diffraction minima is

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A closed piston-cylinder with air expands and does 2000 : a closed piston-cylinder with air expands and does 2000 ft-lbs of work. heat is added in the amount of 4 btu. what is

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