A person attempts to knock down a large wooden bowling pin by throwing a ball at it.
The person has two balls of equal size and
mass, one made of rubber and the other of
putty. The rubber ball bounces back, while
the ball of putty sticks to the pin.
Which ball is most likely to topple the bowling pin?

On a mild saturday morning while people are working inside, the furnace keeps the temperature inside the building at 23degreesc. at noon the furnace is turned off, and the people go home. the temperature outside is a constant 16degreesc for the rest of the afternoon. if the time constant for the building is 3 hr, when will the temperature inside the building reach 18degreesc? if some windows are left open and the time constant drops to 2 hr, when will the temperature inside reach 18degreesc?