National Income based on the
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Which insurance salesman invented the fountain pen in 1884?
Lewis Edson Waterman patented the first practical fountain pen in 1884.
Isotopes have ______.
I. similar physical quantities and different chemical properties
II. different physical properties
III. similar chemical properties
Who was affectionately Known as the " Grand Old Man Of India"
Where the Song Dam drinking water project is to be set up
How many legs does a butterfly have?
The planet with the maximum number of natural satellites (moons), so far discovered is
Jupiter 63
Saturn 60
Uranus 27
Neptune 13
Pluto 3
Mars 2
Earth 1
Venus 0
Mercury 0
1 kWh = __________ × 106J.