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604. Why does Hot water cool more faster than Cold water?

The cooling rate of water or any other substance depends on the temperature difference between the object and the atmosphere. Greater the temperature difference, faster the rate of cooling. Well, to understand this better, take the case of two interconnected beakers, one with medium water level and the other with small water level. Water flows. But, if the water level is very high in the beaker, water flows even faster. This cooling phenomenon was discovered by Sir Isaac Newton, and is popularly known as Newton's law of cooling.
 
603. Why does Aspirin help during a Heart Attack?

Platelets are cells that clump together and help to form blood clots. Aspirin keeps platelets from clumping together, thus helping to prevent or reduce blood clots. During a heart attack. Blood clots form in an already-narrowed artery and block the flow of oxygen-rich blood to the heart muscle.
 
It only takes a second to break a glass, but putting it back together is a hard task. Have you ever thought about it? Breaking is easier than building - but why? What's the difference, anyway? Why does time only move forward? We will try to answer these questions...
 
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