In 2-3 complete sentences, explain the relationship between speed, frequency, and wavelength. i really need help on this question :(

Can anybody me with this? ? (picture included.)

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?