How could you decrease the sleds acceleration

How does the kinetic energy of a charge change as the charge moves under the effect of an electric field from higher potential to lower potential? a.the kinetic energy increases.b.the kinetic energy decreases.c.the kinetic energy remains the same.d.the kinetic energy is always zero.

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?

The inner planets or call terrestrial because they