Hold a rag with the hand that is picking up the spoon.
Answer:
The natural phenomenon used to describe the length of a meter is the speed of light. The length of a meter is the length a light path travels in 1/(299792458) seconds through a vacuum.
The definition is better due to the uncertainty involved in the use of the length of a standard meter stick because the length of the meter stick could change due to atmospheric conditions from place to place
Explanation:
Hydrogen fusion is the answer. It is also known as <span>hydrogen burning. </span>
Explanation:
Hydrogen peroxide (H2O2) when decomposes forms water and oxygen in a reaction as shown below
However, this reaction is not completely balanced as number of oxygen atoms on reactant and product sides are not same
So, the complete balance equation looks like
Answer:
Explanation:
Given
The length of the box is
1 liter of air has a mass of 1.3 gm
So, the density of air is
The volume of the box is
Mass of air in the box is