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CBSE Class 9 Answered

THE ATTRACTION FORCE OF TWO 1 KG MASS OBJECT WHICH LIES AT 1 METRE DISTENCE IS CALLED ...................................... CONSTANT.                                                                             
2. WHY DOES ICE FLOAT IN WATER.
Asked by chitrali73 | 26 Aug, 2016, 08:07: AM
answered-by-expert Expert Answer
The attraction force of two 1 kg mass objects which lie at 1 m distance is called Gravitational constant.
 
begin mathsize 12px style straight F equals fraction numerator Gm subscript 1 straight m subscript 2 over denominator straight r squared end fraction because straight m subscript 1 equals straight m subscript 2 equals 1 space kg space and space straight r equals 1 space straight m therefore straight F equals straight G end style
 
Ice floats on water because its density is less than water. The density of water is 1 g/cc whereas that of ice is 0.93 g/cc.
Answered by Romal Bhansali | 26 Aug, 2016, 11:18: AM

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CBSE 9 - Physics
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