A truck comes to a 1000-ft.-long bridge and stops right before going onto it to read a sign. The sign says that the maximum weight the bridge can hold is 4 tons, which is the exact weight of the truck. So the truck starts going towards the bridge. About halfway over the bridge a little […]
Mrs. Duffus would often complain when Duffus left the door to the basement open. “The cool air from the basement makes the upstairs cold; close that door, Duffus!” she would rant. “It won’t do any such thing,” Duffus would reply and go on his way. Duffus was right, but why? AnswerHot air rises and cold
After climbing to the top of a mountain, Phil is hungry and gets out his cookpot for a good pasta meal. Unfortunately, as it’s not a pressure cooker it will take longer to cook. What can Phil do to cook the spaghetti more quickly?(He’s already turned the fuel on maximum, and he doesn’t have to
If a light oxygen tank were tied to a bird so that it might breathe on the moon, would the bird fly faster, slower or the same speed as it does on earth? (Remember that there is less gravity on the moon) AnswerA bird cannot fly on the moon because there is no air to
In 1753, Captain Barbarosa of the Pyrate Mc.Takey (his ship) was travelling to the new world, America, from England. He went there and pillaged dozens of towns before he was satisfied. When he tried to get back to England on the same route, he found it was quite impossible. How come? AnswerThere are definite wind
Rashad bought some termites and put them in a suitably ventilated jar. He gave them some leaves to eat that contain important elements termites need to live on. After some days he noticed that many were dying. Rashad was very sad. Can you help him by telling him what was wrong with his termites? AnswerTermites
Shady was introducing his invention to a “Birds Unlimited” convention. He explained that he developed a special insulation for high-powered electrical lines. This insulation is guaranteed to save thousands of birds that unwittingly land on the lines and are electrocuted each year. Shady claimed that with all the birds saved, the annual summer mosquito problem
A female purebred white cat and a male purebred black cat had a litter of 12 kittens. Out of the 12 kittens, all but 3 were black. How many female kittens were there? Answer9x= recessive: whiteX= dominant: blackA purebred, female, white cat would have the alleles xx for fur colour (white). A purebred, male, black
Bob the plumber is repairing a leaking brass pipe. After careful inspection he finds that he will have to cut the pipe and sweat a new piece in place of leaky section. (Sweat is a term used to describe the procedure of using solder and a torch to mend two pieces of brass pipe together.)
Picture an empty, clear wine bottle with a cork secured at the top in the usual way. Inside the bottle a metal ring hangs suspended by a string. How is it possible to make the metal ring drop to the bottom of the bottle without touching the ring, the thread, the cork or the bottle?
Two identical jars are placed on a scale, each with one fruit fly in it. One fly is flying and the other one is sitting. Which jar weighs more? AnswerNeither; they weigh the same. The only reason the fly is flying is because it flaps its wings to make air push it up. So the
There is a box with a highly explosive bomb inside it. The lid of the box is made of glass and attached to this lid is a bowl of mercury with a dozen exposed wire leads just out of the reach of the mercury. You know that any attempt to remove the lid or cut
A cargo plane loaded with canaries is set to take off but the co-pilot has calculated the weight of the plane and its contents is just a few pounds over its maximum allowable takeoff weight. “No problem,” he tells the captain, “I’m going back to the cargo area. When you hear me yelling, go ahead
Tom had just jumped out of an aircraft at 5,000 ft above hard ground when he looked up and saw a relatively large hole in his parachute. He did not use his reserve chute; no one else was around to help him, and yet he landed safely.How did he survive? AnswerMost of the parachutes need