the police department determined that the force required to drag a 130.0 N tire across the pavement at a constant velocity is 100.0 N. Specifications from the trucks manufacture claim that the effective coefficient of friction for the truck tires is nearly identical to that of the car. The weight/masses of the truck and care are as follows: Car: 13,600 N Truck 69,700 N. What is the coefficient of friction of the cars tires and the trucks tires

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by

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.

How will the system respond to a temperature increase?