Astudent on a piano stool rotates at a rate of 2.85 rev/s. the student holds a 1.25kg mass in each outstretched arm, 0.76m from the axis of rotation. the combined momment of inertia of the student and the stool without the two masses, is 5.45kg*m^2, a value that remains constant. as the student pulls his arms inward, his rate of rotation increases to 3.50 rev/s. how far are the masses from the axis of rotation at this time?

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.