Sunglasses have lenses made of dark glass that reduce the amount of daylight entering your eyes. design a test using a light meter and a lamp to find out if the two lenses in a pair of sunglasses are equally effective.

Asubmarine has a "crush depth" (that is, the depth at which water pressure will crush the submarine) of 250 m. what is the approximate pressure (water plus atmospheric) at this depth? (recall that the density of seawater is 1025 kg/m3, g = 9.81 m/s2, and 1 kg/(ms2) = 1 pa = 9.8692 10-6 atm.) a. 34.8 atm b. 24.8 atm c. 25.8 atm d. 7.8 atm

Aknife blade is a(n) a. lever b. screw c. wedge d. inclined plane

An object of dimensions 50 cm x 40 cm x 0.20 cm has a mass 60g. find its density in g/cm3 and kg/ m3