Acar is traveling on a straight, level road under wintry conditions. seeing a patch of ice ahead of her, the driver of the car slams on her brakes and skids on dry pavement for 50 m , decelerating at 7.5 m/s2 . then she hits the icy patch and skids another 70 m before coming to rest.
a) if her initial speed was 78 mi/h , what was the magnitude of the deceleration on the ice?

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 branches of natural science include the study of an organism that lived 10 million years ago

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.