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AnnyKZ [126]
4 years ago
13

How do scientists use radioactive decay to date fossils

Biology
1 answer:
Hatshy [7]4 years ago
5 0
By having babies and
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A force of 2.20 N is exerted on a 7,20 g rifle bullet. What is the bullet's acceleration? (Enter your answer in m/s^ 2 )
sweet [91]

Answer:

The answer is 306 m/s^2

Explanation:

F = m*a

We can rearrange this formula to get a = F / m.

The SI unit for mass is kilograms (kg).

The SI unit for acceleration is m/s^2.

There are 1000 grams in a kilogram.

7.20 g = 0.00720 kg

Force (2.20 N) / 0.00720 kg = 305.56 m/s^2

Accounting for Sig Figs, the answer is 306 m/s^2.

Gee, that's one fast bullet.

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3 years ago
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dimulka [17.4K]
D, All of the above.
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What prevents ions from crossing the plasma membrane via
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Simple diffusion is the concept of a substance moving from an area of high concentration to a lower concentration without energy input. Because the plasma membrane is made of lipids which are non-polar, this membrane readily allows non-polar substances to diffuse through easily. If a substance has a charge like that of an ion, it will be difficult for the ion to cross the plasma membrane through simple diffusion. The answer should be B. 
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Which of the following statements describes what happens to a molecule that functions as the reducing agent (electron donor) in
mr_godi [17]

Answer:

In a redox reaction, a reducing agent will donate electrons to another chemical species and then it becomes oxidized.

Explanation:

A redox or oxidation-reduction reaction is a chemical reaction where exchange of electron(s) happen between two chemical species (molecule, atom or ion). In this reaction, one chemical species act as an oxidizing agent while another will be a reducing agent.

An example of redox reaction is given in the attachment.

In a redox reaction, the oxidation number of a reducing agent will be increased,  whereas oxidizing agent will be reduced.  

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