Heat transfer, specific heat. and calorimetrya 1.28-kg sample of water at 10.0 "c is in a calorimeter. you drop a piece of steel with a mass of 0.385 kg at 215 "c into it. after the sizzling subsides, what is the final equilibrium temperature? (make the reasonable assumptions that any steamproduced condenses into liquid water during the process of equilibration and that the evaporation and condensation don’taffect the outcome. as we’ll see in the next section.)

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".