An ice skater whirls with her arms and one leg stuck out as shown in Figure 11.93, making one complete turn in one second. Then she quickly moves her arms up above her head and pulls her leg in as...

An ice skater whirls with her arms and one leg stuck out as shown in Figure 11.93, making one complete turn in one

second. Then she quickly moves her arms up above her head and pulls her leg in as shown in Figure 11.94.

(a) Estimate how long it now takes for her to make one complete turn. Explain your calculations, and state clearly what

approximations and estimates you make.

(b) Estimate the minimum amount of chemical energy she must expend to change her configuration.