The e. m.f. of a cell is 4 V. What energy is dissipated by the cell in 20 seconds if a current of 2 amperes flows in the circuit?

Around faucet handle is part of a(n) a. lever b. screw c. inclined plane d. wheel and axle

Hydrogen and helium are both members of?

Along the line connecting the two charges, at what distance from the charge q1 is the total electric field from the two charges zero? express your answer in terms of some or all of the variables s, q1, q2 and k =14ï€ïµ0. if your answer is difficult to enter, consider simplifying it, as it can be made relatively simple with some work.