Calculate the Critical angle for
(i) an air glass surface
​

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

Which component of the earth’s atmosphere is decreased due to photosynthesis?

Part of a control linkage for an airplane consists of a rigid member cb and a flexible cable ab. if a force is applied to the end b of the member and causes it to rotate by θ = 0.5°, determine the normal strain in the cable. originally the cable is unstretched.