Do Polar Bears Get Lonely?: And Answers to 100 Other Weird and Wacky Questions About How the World Works

By New Scientist

Amazing and fascinating questions and solutions from the crew at the back of the overseas phenomenon Why do not Penguins' ft Freeze?

The popular-science journal in the back of the runaway foreign bestsellers Why do not Penguins' toes Freeze? and Does whatever devour Wasps? takes on one other impossible to resist batch of the unusual, foolish, and mind-boggling questions that plague curious minds across the world:
- Can pigeons sweat, can fish get thirsty, and will bugs get fat?- may well somebody dedicate the correct homicide by way of killing somebody the day after receiving an entire blood transfusion?- Is there how to beat the percentages of the lottery through the use of math?- How a lot mucus does a nostril produce in the course of the common cold?- If compelled to consume components of your self to outlive, which non-vital organs may be the such a lot nutritious?
Culled from New Scientist's well known "The final notice" column and edited by way of Mick O'Hare, the writer of How to Fossilize Your Hamster, Do Polar Bears Get Lonely? is absolute to amuse and amaze up to it informs.

(And if a polar undergo seems to be lonely, it most likely capacity there wasn't sufficient walrus for dinner.)

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Theightthespan> Colgate-Palmolive’s U. S. patent quantity 4,969,767, granted in 1990, describes a scheme for including stripes of 2 colours. right here, the significant pipe is surrounded through a much wider yet shorter pipe, which creates an area for a moment coloured paste. Tiny holes once more bring this paste onto the outside of the white paste. Tom Jackson otherwise to create striped toothpaste is to pack columns of other coloured pastes part through part in a vertical dispenser. The trend in all fairness good preserved even if its diameter is lowered because the pastes are squeezed and compelled throughout the gap on the best of the tube. in spite of the fact that, until you employ a pump dispenser, the motion of compressing the tube has a tendency to combine up the stripes. Neil Rashbrook due to Blair Scott of Falkirk, uk, for recognizing an interactive demonstration on-line of pump dispensers being stuffed utilizing this latter strategy (see http://aquafresh. co. uk/KIDS/activities/milk-teeth-activities/how-do-we-get-the-stripes-into-aquafresh. aspx). Patents of the innovations pointed out by means of our first correspondent, whole with diagrams, will be f ound at http://www. google. com/patents. —Ed. funds luggage while my financial institution debit card doesn’t paintings whilst swiped, a few gasoline stations appear to have an inventive and potent answer. They wrap the cardboard in a skinny, transparent plastic bag and swipe it again—and it really works. Why? Matt Huddlestone The cardreader has a small induction coil that detects a succession of magnetic and nonmagnetic zones within the card’s magnetic stripe. whilst the cardboard is pulled throughout the reader, every one magnetized area makes a small electric pulse because it passes the coil. The zones are prepared to encode the knowledge had to entire a transaction—along with, in nations similar to the us and the uk, the client’s PIN (personal id number). The magnetic stripe comprises magnetized debris embedded in a plastic binder with lubricant. it may be broken in lots of methods, together with publicity to a wide exterior magnetic box, even if from an everlasting magnet or a high-strength alternating present. harm may also take place via a steady “smearing” strategy, within which a few magnetic debris are bodily dragged from one a part of the stripe to a different. This transfers a couple of magnetized debris into zones of the stripe that in the past had none, corrupting the knowledge. this can be by means of a long way the most typical mode of failure, and this smearing strategy is maybe lower than method in your card. besides the fact that, the “contaminated” zones nonetheless have a decrease magnetic box than the accurately magnetized zones. Magnetic box depth is ruled by way of an iil. in ho Dnverse-square legislation, so if the cardboard commonly passes inside zero. 01 millimeters of the reader and also you double this, the sign picked up through the reader will fall to 1 / 4 of its common point. only a small elevate in distance, reminiscent of that supplied by means of the plastic bag the questioner has spotted, will lessen the vulnerable sign from a infected zone—which is meant to be blank—to a degree that the reader is probably going to check in as a 0.

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