2. For the following thermal-fluid systems: Draw a picture or diagram Define a system boundary or control volume boundary Define as open or closed

adv ctate An infinitely long cylindrical container has a cross section area of radius R, and is placed horizontally with gravity being in the -y direction, as shown in the figure. The cylinder is 50% filled with water (the shaded part), with density p. The other 50% of the volume in the cylinder is filled with air with constant pressure of p = Po. The length of the cylindrical container in the axial direction is W. R Use the surface integral method to compute the hydrostatic force acted on the 4th quadrant of the cylinder wall, as shown by the thickened line in the figure.

Q4/ A room on the second floor of a house with a balcony has a door. The door made of teak (wood) and it contains a large sheet of glass (outside winter type) in the middle and constitutes 80% of the area of the door. Door thickness is 40 mm and the temperature in the room 25. °C when the temperature is in the balcony 8 °C. Calculate the rate of heat loss from the room to the balcony through the door. The door dimensions 2m x 1m. Assume Inside and outside still air thermal resistance f= 8.29 W/m2 °C and f. 34.1 W/m2 °C respectively

1. Temperatures are measured at the left-hand face and at a point 4 cm from the left-hand face of the planar wall shown in the figure below. These temperatures are T₁ = 45.3 °C and T* = 21.2 °C. The heat flow through the planar wall is steady and one dimensional. What is the value of T2 at the right-hand surface of the wall? TI T* 4 cm 10 cm T2