Why does a cup of coffee cool faster than the pot from which it is poured? Will it stay warmer in the cup or pot?
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A person cooks a meal in a 30-cm-diameter pot that is covered witha well-fitting lid and lets the food cool to the room temperatureof 20°C. The total mass of the food and the pot is 8 kg. Now theperson tries to open the pan by lifting the lid up. Assuming no airhas leaked into the pan during cooling, determine if the lid willopen or the pan will move up together with the lid.
As you look out of your dorm window, a flower pot suddenly fallspast. The pot is visible for a time t, and the vertical length ofyour window is L . Take down to be the positive direction, so thatdownward velocities are positive and the acceleration due togravity is the positive quantity g .Assume that the flower pot was dropped by someone on the floorabove you (rather than thrown downward).Note: flower pot was dropped at a height h above the bottom of yourwindowwhere h = [ g ((t/2) + L/(gt)) ^2]/2If the bottom of your window is a height h above the ground, whatis the velocity v_ground of the pot as it hits the ground?v_base = (L/t) + (gt)/2Express your answer in terms of h, L, t, v_base, g.
A high-quality pot is designed so heat can enter readily and be distributed evenly, while the rate of energy loss from the pot is kept to a minimum. Many high-quality pots have copper bases and polished stainless steel sides. Based on conduction and radiation principles, explain why this design is better than all-copper or all-steel units.