A balloon lifting in air follows the following principle_____________________?

Related Mcqs:

For pipes, laminar flow occurs when Roynolds number is__________________?

A. less than 2000 B. between 2000 and 4000 C. more than 4000 D. less than 4000 E. none of the above...

If the surface of liquid is convex, men ___________________?

A. cohesion pressure is negligible B. cohesion pressure is decreased C. cohesion pressure is increased D. there is no cohesion pressure E. none of the above...

Non uniform flow occurs when_________________?

A. the direction and magnitude of the velocity at all points are identical B. the velocity of successive fluid particles, at any point, is the same at successive periods of time C. the magnitude aricf direction of the velocity do not change from point to point in the fluid D. the fluid particles move in … Non uniform flow occurs when_________________?Read More...

In the case of steady flow of a fluid, the acceleration of any fluid particle is________________?

A. constant B. variable C. zero D. zero under limiting conditions E. never zero...

The difference of pressure between the inside and outside of a liquid drop is _______________?

A. p = Txr B. p = T/r C. p = T/2r D. p = 2T/r E. none of the above...