A block of density 2400kg/m3 has a volume of 0.20m3. Calculate: a) it’s mass

b) it’s weight

c) it’s apparent weight when completely immersed in a liquid of density 800kg/m3

What do you think car designers do if the damage caused by a crash test is too severe?

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount

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?