Question

1.who is ohm?
2.why are valves present in heart​
3. why modern periodic table form

Answer 1

Answer:

1. Georg ohm was a German physicist and mathematician.

Answer 2

Answer:

1.Georg Simon Ohm was a German physicist and mathematician. As a school teacher, Ohm began his research with the new electrochemical cell, invented by Italian scientist Alessandro Volta.

2.The valves prevent the backward flow of blood. These valves are actual flaps that are located on each end of the two ventricles (lower chambers of the heart). They act as one-way inlets of blood on one side of a ventricle and one-way outlets of blood on the other side of a ventricle.

3.Modern Periodic Law

Scientists arranged elements in increasing order of their atomic numbers from left to right across each row. And discovered that the elements having similar properties repeat after regular intervals.