An engine has excessively worn exhaust guides. Technician A says to look for weak or short exhaust valve springs. Technician B says that this can cause excessive crankcase pressure. Who is right?

The midpoints? a, b, and c are marked on the histogram. match them to the indicated scores. which? scores, if? any, would be considered? unusual?

A175 g lump of molten lead at its melting point (327 c) is placed into 55.0 g of water at 20.0 c. the specific heat of lead is 130.j/kg c and the hf of lead is 20,400 j/kg. when the lead and the water have reached equilibrium, what is the temperature of the mixture?

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