nazli father buys a bar fridge with a mass of 30kg. he unloads the box containing the bar fridge in his driveway and starts to push it towards the house. at first he has to push with a force of 135N to get the box to start moving. once it is moving, he has to exert a Force of 120N to keep it moving with a constant speed. for the box on the driveway, calculate the maximum coefficient of static friction?​ calculate the coefficient of kinetic friction

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present

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.