மரத்தின் ஒரு பகுதி தண்ணீரில் மிதக்கிறது, அதன் கனஅளவில் 65% தண்ணீருக்கு அடியில் உள்ளது. எனில் அதன் அடர்த்தி (கிகி/மீ3 இல்) தோராயமாக எவ்வளவு?

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RRB ALP Electrician 22 Jan 2019 Official Paper (Shift 1)
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  1. 0.25 × 102
  2. 0.65 × 103
  3. 0.55 × 103
  4. 0.35 × 102

Answer (Detailed Solution Below)

Option 2 : 0.65 × 103
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Detailed Solution

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சரியான பதில் 0.65 × 103 ஆகும்.

 Key Points

நீரின் அடர்த்தி = 1000 கிகி/மீ3

மரத்தின் மொத்த கனஅளவு V ஆக இருக்கட்டும்.

நீரின் எடை = மேல்அமுக்கம்

மரத்தின் அடர்த்தி*V*g = 1000*0.65V*g

எனவே, மரத்தின் அடர்த்தி =0.65 × 103 கிகி/மீ3.

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