BRAIN TEASERS (11/24): Answers
Ice Boats (Mummy Sold Separately)
Forget about the mummy. Add the wood pulp to the water and freeze the mixture. The resulting solid, called pykrete, will have incredibly useful properties.
For example, several decades ago Geoffrey Nathaniel Pyke (1894-1948) showed that the frozen mixture was extremely hard to break and very slow to melt. If a ship were made of pykrete, it would be unsinkable; torpedoes could hit it and do little damage. Pykrete has a crush resistance of greater than 3,000 pounds per square inch. A 1-inch column of pykrete can support an automobile. The wood pulp also makes the pykrete extremely stable at high temperatures. If a .303 caliber bullet is fired at the pykrete, it will penetrate only 6.5 inches. The United States and Canada were so impressed with the idea of assembling pykrete warships that a 60-foot-long, 1,000-ton pykrete ship was built in one month on a Canadian lake and never melted through the hot summer.
Mystery Magic Liquid
The mysterious liquid is water. The rock is pumice or volcanic glass which floats in water and the wood was from the desert ironwood tree which is so dense that it actually sinks in water.
Weight, How Is That Possible?
A helium filled balloon; or a balloon filled with any gas lighter than air.
Earth’s atmosphere causes a helium balloon to float, thus making it impossible to weigh. On the moon, the lack of atmosphere causes the balloon to sink, allowing it to be weighed. It will only weigh a little bit, but will still be heavier than on earth.
Worker’s Lawsuit: Help Ban Drugging in the Workplace
Trimethylxanthine is also known as caffeine.
Brain Teasers (11/24)