. Why does hot maple syrup pour more easily than cold maple syrup? 2. If the plumbing in your dorm carried honey instead of water, filling a cup to brush your teeth could take a while. If the faucet takes 5 s to fill a cup with water, how long will it take to fill your cup with honey, assuming all the pressures and pipes remain unchanged? 3. Why does a relatively modest narrowing of the coronary arteries, the blood vessels supplying blood to the heart, cause a dramatic drop in the amount of blood flowing through them? 4. If you start two identical paper boats from the same point, you can make them follow the same path down a quiet stream. Why can't you do the same on a brook that contains eddies and vortices? 5. An electric valve controls the water for the lawn sprinklers in your backyard. Why do the pipes in your home shake whenever this valve suddenly stops the water but not when the valve suddenly starts the water?