Asound wave with a power of 8.8 ×10^-4 w leaves a speaker and passes through section a, which has an area of 5.0 m^2 what is the intensity of sound in this area? 1.8×10^-4, 1.8×10^-6, 1.6×10^-4 1.6×10^-6

What is the measure of a change in an objects velocity?

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air