emily is spinning the back wheel of her bike to make sure it is balanced. she is using the pedal in order to spin the wheel. if the pedal has a torque of 1.38Nm and she is exerting a force of 2.3N what is the length of the lever arm?

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples