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	Common Teasers in Physics

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Get Back To Home Page Common Teasers in Physics Biology Astronomy Miscellaneous Animals -> Have you ever read about tiger moth,anaconda,blind snake, sea cow read about it SPECIALS -> Global Warming Scientology Star Stuff Periodic Table ABOUT ME Brief Info View Profile View Page Stats See who's visiting this page. Ask Me Not satisfied with teasers inlisted in my site so just ask me and we shall include your teaser next month. By To see all the teasers inlisted in my site click here Did You Know? The fly's foot is a suction cup that is slightly hollow and moist. Pushed against a flat surface. The foot squeezes out air. Moisture seals the foot edge, while the vaccum holds the foot tightly to the cieling.

Q . How does compass point at north - south Direction ? Ans . Earth behaves like a magnet with its own north - south Poles . But its North Pole is near geographic South pole (The South Pole we predict) and its South Pole near geographic North Pole (The North Pole we predict) . As you know like poles of two different magnet attract . So when the compass's (which is also a magnet ) north pole attract the south pole of the Earth (which is near geographic north pole) , the compass indicate geographic North Pole . This applies same on the case of pointing at the south pole . Q . Why in some planes we hear the sound of the plane after we see it ? Ans . There mostly two types of planes - SONIC and SUB SONIC planes . Sub sonic planes have the speed less than sound whereas the Sonic planes are those which are faster than sound . so in sonic planes we hear the sound after we see it because it it is faster than sound . Q . Why don't submarine sink when they move under water ? Ans . When a submarine is moving on the surface of water it is kept afloat by the air which is stored in its blast tanks . In order to go underwater these tanks are filled with water . This increases the density of the ship . According to the law of buoyancy the float inside water when the wieght of the body equal to the wieght of the water displayed by it. Therefore tanks are filled till the submarine niether rises nor sinks , but stays at the required depth . Q . Why do we feel warm when we run or exercise ? Ans . The human body is like a machine which transforms energy . The body changes energy from food into other kinds of energy . One form of energy is called Dynamic Energy . This is developed in the muscles . When the muscles are used in exercise or running , part of energy is turned into heat - thermal energy . If you run very fast more heat is produced . This is why you feel warm when you have been playing games or running races . Q . What makes a parachute land slowly? Ans . Like water ,air also exerts a Buoyancy force on a body trying to come down through it . When the parachute is spread , the Buoyancy force becomes very high and almost balances the weight of parachute and Parachuter together and the parachute descends slowly through the air . <<Back Return to Common Teasers In :- � Return to Common Teasers In Biology � Return to Common Teasers In Astronomy � Return to Common Teasers In Miscellaneous � Consultation/Enquriy Mail To Author Return To Amateur Scientist and Common Teasers Hosted by www.Geocities.ws