Two perfectly matched athletes on level ground are pulling opposite ends of a rope in a tug of war. the rope is not moving or accelerating. each athlete can pull with a force of 200 pounds. the system of interest is defined as the athlete holding the east end of the rope, (but not the rope itself or the ground, etc). the net force on the system )200 pounds. b)0 pounds. c)400 pounds.

Six solutions are made, each with a y concentration of 1.0 μm and varying concentrations of ab as shown below. based on the concentrations, rank the solutions in decreasing order of reaction rate.

Agas initially at p1 = 1 bar and occupying a volume of 0.5 liter is compressed within a piston–cylinder assembly to a final pressure p2 = 4 bar. (a) if the relationship between pressure and volume during the compression is pv = constant, determine the volume, in liters, at a pressure of 3 bar. (b) repeat for a linear pressure–volume relationship between the same end states. reference

An open cart is moving along a straight frictionless horizontal track. when rain starts falling vertically into the cart, what happens to the speed of the cart?