Asealed tank contains 29 moles of an ideal gas at an initial temperature of the pressure of the gas is increased until the final pressure equals 1.9 times the initial pressure. the heat capacity at constant pressure of the gas is what is the heat absorbed by the gas? let the ideal-gas constant r = 8.314 j/(mol • k).

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.