Safety devices used in electric circuit

Draw a circuit that contains 2 batteries, three lights in parallel and a switch that controls the whole circuit.

Find the wave length of light with frequency of 2x1020 Hz. What is the traveling speed for this light to travel in a medium with the index of refraction to be equal to 1.5?

If you add mass to a car on a ramp the acceleration of the car does not increase proportional to the increase in mass. Why not?

A leopard with a mass of 55.00 kg climbs 12.0 m up a tree. What is it's gain in GPE

A fold is a _ in a rock, and a fault is a _in a rock?

What is 0.002 represented by

As the amount of charge on two objects increases, the strength of the electrical force between the objects

Which of the two resistors dissipates the larger amount of power?

Three students derive the following equations in which x refers to distance traveled, v the speed, a the acceleration (m/s^2), and t the time, and the subscript (0) means a quantity at time t=0: a) x=vt^2 + 2at, b) x=v0t+1/2at^2, and c) x=v0t+2at^2.

Which is a use of fiber optics?