An object is moving along a straight line at a constant speed of 20 m/s. How far did the object travel during the first 4 seconds?

Two thin 80.0- cm rods are oriented at right angles to each other. each rod has one end at the origin of the coordinates, and one of them extends along the x- axis while the other extends along the yaxis. the rod along the x- axis carries a charge of - 15.0 μ c distributed uniformly along its length, and the other rod carries 15.0 μ c uniformly over its length. find the magnitude and direction of the net electrical force that these two rods exert on an electron located at the point (40.0 cm, 40.0 cm). (e

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

What does si stand for, when referring to a system of measurement