Looking at waves a and b. which description correctly describes the waves?

a) wave a has twice the energy because it has a frequency twice as large.

b) wave a has twice the energy because it has an amplitude twice as large.

c) wave b has twice the energy because it has an amplitude twice as large.

d) waves a and b gave the same energy because they have the same amplitude.

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f