CENTROIDS REVIEW ( fast) 1. List two common misunderstandings about centroids.

2. Explain how you would correct each misunderstanding.

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

Water at the rate of 1 kg/s is forced through a tube with a 2.5 cm inner diameter. the inlet water temperature is 15°c, and the outlet water temperature is 50°c. the tube wall temperature is 14°c higher than the local water temperature all along the length of the tube. what is the length of the tube?

Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero