PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free Demo1. Define the density of objects.
Density is defined as the of the substance contained in a unit .
The formula for density (\(D\)) is given as
The SI unit of density is and the CGS unit is \(g/ cm^3\).
2. What is one light year?
The covered by the light travelling at a speed of \(\times{10^8}\) \(m\) in for a year gives one light year.
The value of one light-year can be calculated by of light and the total by the light in one year.
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