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Lina20 [59]
3 years ago
13

Why do scientist need a common system of measurement?

Biology
1 answer:
EastWind [94]3 years ago
5 0
So when one scientist turns around and says the mass of an electron is 9.10938291×10^-31 kilograms we know what a kilogram is and so we don't get an answer that it's 32949 microsmiths as he invented his own measurement because he needed one.
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Suppose that in​ 2008, 819,450 citizens died of a certain disease. Assuming the population of the country is 250 ​million, what
Goshia [24]

Answer:

The correct answer is 327.78.

Explanation:

A mortality rate refers to the determination of the rate of the occurrences of deaths in a given population in the course of a particular time period. The formula for finding the mortality rate is:  

Deaths taking place in a given time duration / the size of the populace among which the deaths have taken place × 10ⁿ

The given population of the country is 250 million

The number of individuals died due to a certain disease is 819450

Thus, the mortality rate per 100000 can be calculated as:  

819450 / 250000000 × 100000 = 327.78 deaths per 100,000 people.  

8 0
3 years ago
Plsss need help on this plsss
Zina [86]
Genotype:
BB:25%
BW 50%
WW:25%

Phenotype:
Black: 25%
Blue: 50%
White: 25%
5 0
3 years ago
Which of the following best describes the chemical components of paint?
Neporo4naja [7]
All/most- ethyl acetate, toluene, aliphatic polyisocyanante, hexamethylene disocyanate, methyl ethyl ketone, dibastic esters, petroleum naphta, bismuth
White - titanium dioxide, zinc
red - iron oxide, cadmium
orange- iron oxide, cadmium
yellow- iron oxide, cadmium
Green - chrome oxide
black- carbon

I got tired of typeing so ----basically they are all made of a pigment which can be a range of chemicals, resin, solvent, and additives. If you are just looking for the main elements in paint, it is silicone, oxygen, and a salt so sodium, chlorine, maybe iodine, or a salt substitute like potassium chloride, potassium nitrate, or calcium hydroxide.

5 0
3 years ago
The diagram below shows a light ray striking Medium A and Medium B at the same angle:
alexgriva [62]

Answer:

A. the speed of the light ray is the same in air and Medium A.

Explanation:

3 0
3 years ago
Why does secondary succession occur faster than primary succession?
antoniya [11.8K]

Answer:

Secondary succession is a faster process than primary succession because some cones or seeds likely remain after the disturbance.

6 0
3 years ago
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