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In a gas turbine unit air is drawn in at 1.02 bar and 15°C, and is compressed to 6.12 bar. Calculate the thermal efficiency and the work ratio of the ideal constant pressure cycle, when the maximum cycle temperature is 800°C.
The relative molecular mass of carbondioxide CO2 is 44. In an experiment, the value of γ for CO2 was found to be 1.3. Assuming that CO2 is a perfect gas, calculate the specific gas constant R and the specific heats at constant pressure cp and at constant volume, cv
A quantity of a certain perfect gas is compressed from an initial state of 0.085m3, 1 bar to a final state of 0.034m3, 3.9 bar. The specific heat at constant volume is 0.724 kJ/kg K and the specific heat at constant pressure is 1.02 kJ/kg K. The observed temperature rise is 146 K. Calculate the gas constant R, the mass of gas present, and the increase in internal energy.
A vessel of volume 0.2m3 contains nitrogen at 1.013 bar and 15°C. If 0.2 kg of nitrogen is now pumped into the vessel, calculate the new pressure when the vessel has returned to its initial temperature. The molar mass of nitrogen is 28 kg/K - mol and it may be assumed to be a perfect gas.
Calculate the internal energy and enthalpy of 1 kg of air occupying 0.05m3 at 20 bar. If the internal energy is increased by 120 kJ/kg as air is compressed to 50 bar, calculate the new volume occupied by 1 kg of air. Assume air is a perfect gas
Determine the mass of air in a vacant room whose dimensions are 4m × 5m × 6m at 100 kPa and 25°C.
a bullet fired into a target loses 1/n th of its velocity after penetrating a distance x into the target how far the will it penetrate before it comes to rest express your answer in terms of n and x
Suppose you are wearing a bracelet that is made of unbroken ring of copper wire. I f you walk briskly into a strong magnetic field while wearing the bracelet, how would you hold your wrist with respect to the magnetic field in order to avoid inducing a current in the bracelet?
A wave has a length of 2m and a frequency of 10Hz. Calculate the wave number . Calculate the angular frequency. Calculate wave speed
