Is the momentum of a car traveling south always the same as the momentum of a car traveling north at the same speed? explain.

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?

Ahuge (essentially infinite) horizontal nonconducting sheet 10.0 cm thick has charge uniformly spread over both faces. the upper face carries +95.0 nc/m2 while the lower face carries -25.0 nc/ m2. what is the magnitude of the electric field at a point within the sheet 2.00 cm below the upper face? (ε0 = 8.85 × 10-12 c2/n · m2)