mega = million. so megaton = million tons. Often used as a comparative power, where the tons referred to are tons of TNT. So, the Hiroshima bomb was about 20kt. = 20 000 tons of TNT. Naturally, this...
There are 100 squares in a 10 by 10 grid.
To discover the total number of squares in any square or rectangular grid, multiply the number of squares along two adjacent sides and you will arrive at...