Air is heated in a 1-meter-long, 4 mm by 16 mm rectangular duct. the air inlet temperature is 27 °c and the air mass flow rate is 0.0003 kg/s. a uniform heat flux of 600 w/m^2 is imposed on the duct surface. determine the average temperature of the air and the surface temperature of the duct at the duct exit.

Acylindrical tank is capable of storing 20,000 foot-pounds [ft ibf] of energy for use in your roommate's 2006 subaru wrx. the tank contains nitrous oxide, n20, which you may assume is an ideal gas and has a molecular weight of 44 grams per mole 1g/mol. the tank fits in a space in the trunk that is no wider than 6 inches fin] and no longer than 10 inches [inj, and you may assume the warm clemson weather is keeping the temperature of the tank inside the trunk at a constant 100 degrees fahrenheit [°fl. what is the weight of the nitrous oxide occupying the tank when full, in units of dynes