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A drug is any chemical substance that alters the body physically or mentally for a non - nutritional purpose.
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<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:
1649 years
Explanation:
It took 1649 years for the world population to double, going from . 25 billion people to . 50 billion people
