Acylinder, which is in a horizontal position, contains an unknown noble gas at 4.00 × 10 4 pa 4.00×104 pa and is sealed with a massless piston. the piston is slowly, isobarically moved inward 16.3 cm, 16.3 cm, which removes 1.50 × 10 4 j 1.50×104 j of heat from the gas. if the piston has a radius of 30.5 cm, 30.5 cm, calculate the change in the internal energy of the system δ u δu .

-13094.55179 J

Explanation:

Q = Heat =

P = Pressure =

= Change in volume = (negative because it is decreasing)

h = Height = 16.3 cm

r = Radius = 30.5 cm

Entropy is given by

Work done is given by

The change in the internal energy of the system is -13094.55179 J

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

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