18th May 2016
Butterflies range in size from just over half an inch up to almost 12 inches. The size of the butterfly depends on the wingspan and the body. The butterfly with the biggest wingspan is the Queen Alexandra’s birdwing, which has a wingspan up to 1 foot (30 cm) wide.
6th May 2016
A raindrop falls on the earth with varying speeds depending on its size and weight. The gravity acts on the falling raindrop and the drop picks up speed. But due to air resistance, which is generally proportional to the velocity, the raindrops attain a terminal speed. A larger raindrop would fall much faster at 9 metres per second whereas a smaller raindrop will fall at a much slower speed of 2 metres per second.