what is meant by spikes o f a abacus
what is meant abacus
ABACUS is one of the tools of representing numbers. It is also called a counting frame.
Spikes represent the places. No of digits in each spike represent the digit at that place.
What is meant by calorimeter. And what is meant by bomb calorimeter.
What is meant by human circulatory system? What is meant by the term"single circulation" and "double circulation "