When vectors are added or subtracted, the net force is called the

How do we measure or think of speed in the united states?

Charge is distributed along the entire x-axis with uniform density λ. how much work does the electric field of this charge distribution do on an electron that moves along the y-axis from y = a to y = b? (use the following as necessary: a, b, ε0, λ, and q for the charge on an electron.)

If frequency goes up, what happens to wavelength? does it get shorter or longer?