Consider a flow of air with a free stream velocity of 10 m/sec and a free stream temperature of 20 degree C over a flat plate with a constant surface temperature of 80 degree C. The average heat transfer coefficient for this problem

How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.

Diverging mirrors and lenses always produce images

Agust of wind pushes a beach ball with a force of 9 newtons.the ball rolls 10 meters in 3 seconds. what is the power of the wind?