Molecular Physics | Thermodynamics Answers

. A diesel engine uses 54.5 kg of fuel oil per hour of calorific value 45 MJ/kg. The thermal efficiency of the engine is 25 per cent. Determine the power output of the engine in kilowatts

The temperature of 4.5 kg of water is raised from 15 °C to 100 °C at constant atmospheric pressure. Determine the heat transfer required

A power station has an output of 800 MW and the thermal efficiency is 28 per cent. Determine the coal consumed in tonne per hour if the calorific value of the coal is 31 MJ/kg

3. A car has a mass of 1600 kg. It has an engine which develops 35 kW when travelling at a speed of 70 km/h. Neglecting losses, determine the resistance to motion in N/kg.

you apply constant horizontal force of 80N to a wooden crate on a smooth horizontal floor.The crate start from rest and moves 11m in 5 seconds.If you stop pushing at the end of 5 seconds,how far does the crate move in the next 5 seconds?

0.05 kg of steam at 10 bar dryness fraction 0.84 is heated reversibly in a rigid vessel until the pressure is 20 bar calculate the change of entropy and heat supplied show the area which represents the heat supplied on a T-s diagram

How much does the gas cylinder last? Volume=14l, Pressure=200 bar and flux=6l/min.

While mammals keep their body temperature close to the 37oC, some animals, such as crustaceans, are exposed to a much wider range of temperatures. For example, antarctic crustaceans live at a temperature of around 2oC. Assuming no other changes how might the Nerst potential for an ion change when warming from 2oC to 37oC?

Liquid of mass 2.5 kg at temperature 20 degree celsius is heated to 40 degree Celsius find the difference intensities at this temperature if its density at 20 °C is 13.6gm/cm^3

A jug is at 15oC and is filled with water at an initial temperature of 85oC. The mass of water is 2.5kg. SHC is 4200. If the final temperature of the water is 34oC:

1. what is the final temperature of the jug?
2. if the jug has a SHC of 400J/kg/oC, what is its mass?