Agirl stands on the edge of a merry-go-round of radius 1.71 m. if the merry go round uniformly accerlerates from rest to 20 rpm in 6.73s. what is the magnitiude of the girls average acceleration.

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.

What is the role of lenses in microscopy?

What organization and environment is described above?