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
You have two bars of iron. One is magnetized along its length; the other is not. Without using any other instrument (thread, filings, other magnets, etc.), find out which is which. AnswerBar magnets are “dead” in their centres (i.e. there is no magnetic force, since the two poles cancel out). So, if bar A is
A man has two eggs. One is raw and the other is boiled. He would like to eat the boiled egg for lunch and save the raw one to have for breakfast the next morning. How can he find the boiled egg without breaking the wrong egg by mistake? AnswerIf the man spins the eggs
Two friends, Fred and Liz, were having a fun night out. They went to the bowling alley, bowled for a while, went to the bar, then left. They went to Liz’s apartment, at which Fred had never been before. Out of the blue Fred said, “How much do you want to bet I can figure
Xavier and Rex each own a television. They watched the exact same programme at the exact same time. However, what looked like white on Xavier’s television looked yellow on Rex’s. In this case, what colour would cyan, on Xavier’s, look like on Rex’s, and why? AnswerCyan would look like green. This is because pixels are
A juggler must perform a trick in which he crosses a narrow bridge juggling 3 balls. He weighs 80 kg and each one of the balls weighs 10 kg. However, the bridge can hold only 100 kg before breaking. The lion tamer said that as long as he kept one ball in the air, the
This bacterial waste product can be extremely deadly in some forms. Yet, millions of people voluntarily ingest it every day.The bacteria produce it as certain materials decompose. It is used by doctors, janitors, racecar drivers and maybe even you.What is it? AnswerAlcohol.In some forms deadly and used as a disinfectant, cleaner or race car fuel.
Professor Lipshultz was showing off his new inventions to a prospective investor. He told the investor that he had developed machines which would allow scientists to study the motion of gas molecules. His explanation of the machines was as follows:“The first unit will take in any gas and completely dry it, removing all the traces