45 kg boy running at 3 m/s land on a 9 kilograms sled that is standing still if the boys stays on the sled find the resulting speed of the slide with the boy aboard

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

Herbivores, carnivores, and omnivores are all types a. decomposers b. producers c. consumers d. biomes

How do you tell if someone actually cares about you? and just say they do?