Blog categorized as Thermal Physics

Q- A cylinder of hydrogen, 2 m in height and with a 25 cm diameter, is dropped and develops a crack of size 0.1 mm2. The gas is stored at 10 bar absolute pressure. Estimate how long it takes for half the contents to leak out. Explain your reasoning and assumptions.

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Q- One mole of an ideal gas is contained in a thermally insulated container that is connected to another container of equal volume that is initially evacuated. The valve connecting the two containers is now opened and the gas allowed to expand isothermally to fill both sides. The new total volume is...

Q- An iPod is left running inside a thin insulating case 2.5 mm thick with thermal conductivity of 0.02 W/K/m. The case is black and at 25 degrees Celsius and exchanges energy with it's surroundings, all of which are at 20 degrees Celsius, by radiation alone. What is the temperature inside the case?

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