Which item is heavier, 50 kg of cotton or 50 kg of iron?

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow

Two waves maximally constructively interfere at a point in space. among the options below, select the possible value of their phase difference at that point in space.a. zerob. πc. π/2d. not determinable by the information provided

How do cracks affect the rate of weathering?