Saturated humid air at 200 kpa and 15c is heated to 30c as it flows through a 4-cm diameter pipe with a velocity of 20 m/s. disregarding the pressure losses, calculate the relative humidity at the pipe outlet and the rate of heat transfer, in kw, to the air.

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.