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WINSTONCH [101]
3 years ago
7

Near the surface of a liquid, fast-moving particles can break free and become a gas.

Chemistry
1 answer:
Anna35 [415]3 years ago
5 0
<span>Near the surface of a liquid, fast-moving particles can break free and become a gas is a true statement.</span>
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If a concentration of 10 fluorescent molecules per μm2of cell membrane is needed to visualize a cell under the microscope, how m
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Answer : Total molecules that will be needed to visualize a single egg will be 78500 molecules of dye.

Explanation : As a single egg cell has an approximately diameter of 100 μm.

We can use this formula to calculate area of the cell membrane;

A = π (100)^{2} / 4;  

We can take π as 3.14 and we get;

A = 3.14 X (100)^{2} / 4  

Soving we get;

A =  7850 μm^{2}  

Here we have to calculate the amount of dye molecules which will be needed for 10 fluorescent molecules / μm^{2}  but;

here 1 μm^{2} = 7850 μm^{2} dye molecules.

Therefore, 10 fluorescent molecules will need;  

7850 X 10 = 78500 molecules of dye.

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What are scientific models used for? Give an example of each of the follwoing types of models: idea, physical, computer
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Scientific models are used to explain phenomena that can not be experience directly and it is also used for prediction.

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An example of physical model is the solar system.

Computer model is used to predict long term events and an example of this is computer simulations.

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Anil accidentally swallows a substance that activates the complement cascade in the absence of bound antibodies. this substance
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HELP 15-21 PLEASE!!!
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