<h3>Answer:</h3>
B] Meters per second
<h3>Explanation:</h3>
- We know that speed = distance ÷ time. So hour per km and second per Mile cannot be the unit of average speed.
- Now the remaining options are <u>miles per hour</u> and <u>Meter per second.</u>
- In comparison with both of these;
we know that metre per second is the SI unit of average speed and hence the answer is <u>meters</u><u> per </u><u>second</u>.
Answer:
To understand the physical change and chemical change, one needs to know what is physical properties and what is the chemical properties of a substance.
Physical property is characteristic or trait of a substance that can be observed without converting the substance to a new substance. If there is any type of change in these physical properties like changing the appearance or form of matter and does not make a new substance, takes place it is called physical change.
A chemical change is a change in the matter of a substance that creates one or more new substances. This type of change includes the formation, color, of a precipitate, change in texture, and many other changes.
If the birth rate is 10 per 1000 and death rate is rate is 10 per 1000 then the growth rate is C 0
Answer: Erwin Chargaff and Franklin Rosalind
Explanation:
Erwin chargaff's work on base composition studies which involves the compilation of the four nitrogenous bases in the DNA double helix
Franklin Rosalind and Maurice studies on Xray diffraction images of DNA studies also assisted in the determination of the position and the distances.
