In a skating stunt known as "crack-the-whip," a number of skaters hold hands and form a straight line. they try to skate so that the line rotates about the skater at one end, who acts as the pivot. the skater farthest out has a mass of 80.0 kg and is 6.10 m from the pivot. he is skating at a speed of 6.80 m/s. determine the magnitude of the centripetal force that acts on him.

What color would an object that reflects green and blue light appear to be in white light? a. blue b. cyan c. magenta d. black

50 g of ice at 0°c is dropped in a beaker containing 100 g of water at 0°c. what will be the contents of the beaker after 5 hours? assume that the room temperature is 0°c.

The arrival of in the early days of europa’s existence could have formed its ocean. it is likely that the water experienced similar to earth. it is also possible that this water is retained beneath europa’s surface and in its atmosphere due to europa’s . 1.) a. precipitation b. water vapor c. icy debris 2.) a. gravitational compression b. biochemical cycling c. radiogenic heating 3.) a, gravity b. magnetic field c. heat energy for plato