Brainteaser Physics: Challenging Physics Puzzlers by Göran Grimvall
By Göran Grimvall
Does a tumbler of ice water crammed to the brim overflow while the ice melts? Does the power within a sauna elevate for those who warmth it up? what is the top approach to cool your espresso -- including the creamer first or final?
These and different tough puzzlers supply a clean -- and enjoyable -- method of studying actual physics. offering either vintage and new difficulties, Brainteaser Physics demanding situations readers to take advantage of mind's eye and uncomplicated physics ideas to discover the solutions. Göran Grimvall presents distinctive and available causes of the options, occasionally correcting the traditional reasons, occasionally placing a brand new twist on them. He presents diagrams and equations the place applicable and ends each one challenge via discussing a particular inspiration or delivering an additional challenge.
With Brainteaser Physics, scholars and veteran physicists alike can sharpen their serious and inventive pondering -- and feature enjoyable while.
(June 12, 2007)
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Additional info for Brainteaser Physics: Challenging Physics Puzzlers
Example text
A worn tire has a radius that is decreased by almost 2 %, and the odometer reading increases by the same amount. Perhaps you regularly drive a long distance with the same car and the same tire pressure. The difference between the distance recorded by the odometer when the tires are new, and some years later when the tires are worn, should be observable. As a curiosity we note that a 42 brainteaser physics taxi driver was once fined because he had put on wheels that were too small to charge his customers for driving longer distances.
1 Moving Backward? Yes, the contact points between the tires and the road. If you ride the bicycle with constant speed v, the axles of the wheels of course also move forward with that constant speed. Where the wheels touch the road, their speed relative to the road is zero (otherwise they would slip), while their diametrically opposite parts move forward with the speed 2v relative to the ground. Any caveat? It is not quite true that the speed is zero at the contact point between the wheel and the road.
9. Where should a fourth identical resistor be added, so that the bright lamp becomes dark? 4 Low Pressure The recorded distance will be longer if the tire pressure is low. The simple argument for this answer is that the effective radius of the front wheel (the distance from wheel axle to the point of contact with the road) is smaller if the tire pressure is low, so that the no math required 41 tire is more compressed. The wheel must make more turns for a given distance. This is also the correct description.