A set of pulleys is used to lift a piano weighing 2,155 newtons. The piano is lifted 22.6meters in 103 seconds. How much power was used to lift the piano? A.
5.02 x 10^6 W

B.
4.63 x 10^3 W

C.
9.82 x10^3 W

D.
4.73 x 10^2 W

Which of the following statements about acidic water is true? a. acid has no effect on the h,o molecules. b. the solution contains a larger number of oh ions than h,o ions. c. the solution contains a larger number of h,o ions than qh ions. d. the solution contains an equal number of h,o ions and oh ions. none of the above e.