Aspherical thermocouple junction is used for temperature measurement in a gas stream. the junction has a diameter of 0.5 mm, k = 35 w/m k, c = 320 j/kg k, and rho = 8500 kg/m3. the convection coefficient between the junction surface and the gas is h = 2.2(v/d)0.5 , and the time for the junction to reach 99% of the initial temperature difference is 5s. what flow velocity can the thermocouple be used for?

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.