How thick must the flywheel be
A 1.0-m radius flywheel is to be made from steel in the form of a solid disc. If the flywheel when turning at 60 rpm store as much energy as a 100-W lamp uses in one minute, how thick must the flywheel be if the density of steel is 7880 kg.m-3.
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The sound of the rustling leaf is also right at the threshold of hearing of the harvest mouse. How far is the harvest mouse from the leaf?
How does knowing the time constant of an RL or RC circuit help us decide the width of a practical pulse input that is short enough to provide a good approximation of an impulse? Illustrate your answer with a numerical example.
Find out the coefficients m and b of the function you decided from (1) and plot the original data with this function on the same plot.
If the maximum cycle temperature ( at the heater exit ) is 1000 C and the minimum cycle temperature is 100 C ( at the cooler exit ) , what is the theoretical limit of the cycle efficiency?
Determine the highest pressure the liquid water can have at the exit of the pump. Neglect the kinetic and potential energy changes of water, and take the specific volume of water to be 0.001 m3/kg
An insulated piston-cylinder device contains 5 L of saturated liquid water at a constant pressure of 150 kPa. An electric resistance heater inside the cylinder is now turned on, and 2200 kJ of energy is transferred to the steam.
Consider a thermodynamic system executing the two reveraible proceses shown in the sketch (ab and adb). What is the heat transferred to an ideal gas if p2=2pa and v2=2v1? express your answer in terms of the gas constant R and T.
Why is the Reynolds Number for onest of turbulence given by Re > 2000 in fully flowing pipes, and Re > 500 in partly flowing pipes and onther open channels?
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