A Car is pushing against the road to go forward with a constant speed speed and direction. It is not acceleration. The road pushes the car forward with a force of 50 newtons. Air Friction resists the car's forward motion with a force of -20 N. How much friction does the road exert on the car?

The slope of a velocity time graph over any interval of time gives the during that interval

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.

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?