The storage of hydrogen in fuel tanks has been improved over the years by clever engineering solutions. It is predicted that soon a fuel tank of 55 liters capacity will accommodate 53 kg of H2. What would be the required size (radius) of a 0.5 m high cylindrical fuel tank to store 53 kg of H2 if this was kept at standard temperature and pressure?

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Items are similar to the free issue items, but their access is limited. (clo5) a)-bin stock items free issue b)-bin stock controlled issue c)-critical or insurance spares d)-rebuildable spares e)-consumables

Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?