With aircraft, other factors affecting optimum cruise altitude include payload, center of gravity, air temperature, humidity, and speed. This altitude is usually where the higher ground speeds, the increase in aerodynamic drag power, and the decrease in engine thrust and efficiency at higher altitudes are balanced. Typical cruising airspeed for a long-distance commercial passenger aircraft is 475â500 knots (878â926 km/h; 546â575 mph).
The process of saturation and slumping continues, leading to failure of dam. c) Structural Failure: About 25% of failure is attributed to structural failure, which is mainly due to shear failure causing slide along the slopes. The failure may be due to:
What causes flash floods? Find out what causes flash flooding and why it can be so dangerous. Flash flooding happens when rain falls so fast that the underlying ground cannot cope, or drain it away, fast enough. Roads can become like rivers and if there is a lot of water, it can flood buildings and carry cars away.