Glass bottle holds 500g of liquid at 40oC and only 300g at 70oC. Find the real cubic expansivity of the bottle. If the linear expanivity of glass is 0.0006K-1

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?