50.0 g of superheated steam at 375 0C flows into a container holding 725 g of water at 20.0 0C.  Assuming no energy was lost, what was the equilibrium temperature of the mixture? (LV)water = 539 cal/g, csteam = 0.363 ca/g 0C

p1..pngFig. 15-2 shows the displacement of a wave at a given position as a function of time and the displacement of the same wave at a given time as a function of position. Determine the frequency of the wave.

A 100-kg person sits on a 5-kg bicycle. The weight is borne equally by the two wheels of the bicycle. The tires are inflated to a gauge pressure of f26g1q21g1.gif> and are f26g1q21g2.gif> wide. What length of each tire is in contact with the ground?

A 12.0 m long copper wire expands by 1.53 cm when heated from 25.0 0C to 100.0 0C.  What is the coefficient of linear expansion for the copper wire?

A scuba tank holds 16.0 L of air at pressure of 225 atm at a temperature of 20.0 0C.  How many molecules of air are in the tank?

A 4.00 moles of a monoatomic ideal gas is heated from 20.0 0C to 100 0C.  What is the change in internal energy of the gas?

What is the work done on 4.00 moles if a monoatomic ideal gas compressed from 975 mL to 250 mL at constant pressure of 3.00 atm?

What is the internal energy of 1.75 moles of an ideal monoatomic gas at a temperature of 20.00 C?

How much energy does it take to heat 4.0 moles of a monoatomic ideal gas from 20.0 0C to 100 0C at constant volume?

A refrigerator needs to move 125 J of heat from its 5.00 0C interior per cycle and move it heat to a 20.0 0C exterior region.  What is the maximum coefficient of performance possible for this refigerator?