One of the brightest comets of the 20th century was comet hyakutake. True or False

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.

Which type of energy would have nothing to do with ironing clothes? a. heat b. chemical c. electrical d. mechanical

How can a cyclist's acceleration change even if its velocity remains constant?