A fast pitch softball player does a "windmill" pitch moving her hand through a vertical circular arc to pitch a ball at 71mph. The 0.20 kg ball is 53 cm from the pivot point at her shoulder. Just before the ball leaves her hand, what is its centripetal acceleration?

Which of the following statements are evidence that gases do not always behave ideally? check all that apply.? a. co2 gas becomes dry ice (solid co2) at 1 atm and –78.5 °c. b. when two gases are mixed, they follow dalton\'s law of partial pressures. c. at 4 k and 1 atm, helium is a liquid. d. it is impossible to compress a gas enough so that it takes up no volume.