Questions from Thermal Fluid Science

Q: Is the state of the air in an isolated room completely specified

Is the state of the air in an isolated room completely specified by the temperature and the pressure? Explain.

Q: Determine the resultant force acting on the 0.7-m

Determine the resultant force acting on the 0.7-m-high and 0.7-m-wide triangular gate shown in Fig. P11–15 and its line of action.

Q: A 6-m-high, 5-m-wide

A 6-m-high, 5-m-wide rectangular plate blocks the end of a 5-m-deep freshwater channel, as shown in Fig. P11–16. The plate is hinged about a horizontal axis along its upper edge thro...

Q: Reconsider Prob. 11–16. Using appropriate software, investigate

Reconsider Prob. 11–16. Using appropriate software, investigate the effect of water depth on the force exerted on the plate by the ridge. Let the water depth vary from 0 to 5 m in in...

Q: The flow of water from a reservoir is controlled by a 5

The flow of water from a reservoir is controlled by a 5-ft-wide L-shaped gate hinged at point A, as shown in Fig. P11–18E. If it is desired that the gate open when the water height i...

Q: Repeat Prob. 11–18E for a water height of 6

Repeat Prob. 11–18E for a water height of 6 ft. Data from Prob. 11-18: The flow of water from a reservoir is controlled by a 5-ft-wide L-shaped gate hinged at point A, as shown in F...

Q: You may have noticed that dams are much thicker at the bottom

You may have noticed that dams are much thicker at the bottom. Explain why dams are built that way.

Q: For a gate width of 2 m into the paper (Fig

For a gate width of 2 m into the paper (Fig. P11–20), determine the force required to hold the gate ABC at its location.

Q: A long, solid cylinder of radius 2 ft hinged at point

A long, solid cylinder of radius 2 ft hinged at point A is used as an automatic gate, as shown in Fig. P11–21E. When the water level reaches 12 ft, the cylindrical gate opens by turn...

Q: The two sides of a V-shaped water trough are hinged

The two sides of a V-shaped water trough are hinged to each other at the bottom where they meet, as shown in Fig. P11–22, making an angle of 45° with the ground from both...