A startled moth is trying to evade a hungry bat hot on its trail, 3.00 m behind it. (a) What would be the time delay in the bat emitting an ultrasonic pulse and receiving the echo for air temperatures of 5.00 ◦C and 35.00 ◦C? (b) Use this range to express the percent uncertainty in locating the moth. Comment.

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