The concorde's exterior is made of aluminum, which has acoefficient of linear expansion of at 15 degrees celsius, the concorde measures 62.1 m in length. when the plane is in flight, friction with the air increases the temperature of the exterior skin to 200 degrees celsius. what is the change in the length of the outer skin of the concorde?
a) 32 cm
b) 20 cm
c) 24 cm
d) 28 cm
e) 36 cm

Suppose that two tanks, 1 and 2, each with a large opening at the top, contain different liquids. a small hole is made in the side of each tank at the same depth 1.57 m below the liquid surface, but the hole in tank 2 has 2.49 times the cross-sectional area of the hole in tank 1. (a) what is the ratio ρ1/ρ2 of the densities of the liquids if the mass flow rate is the same for the two holes? (b) what is the ratio rv1/rv2 of the volume flow rates from the two tanks? (c) at one instant, the liquid in tank 1 is 14.9 cm above the hole. if the tanks are to have equal volume flow rates, what height above the hole must the liquid in tank 2 be just then?

Inside of a windmill or a dam is a that is used to transform one type of energy into electrical energy. a. motor b. generator c. transformer d. power pack

Carbon 14 is a naturally occurring stable