Which electromagnetic waves have the longest wavelength and lowest frequencies? O infrared waves
O ultraviolet rays
O radio waves
O gamma rays

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge