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max2010maxim [7]
3 years ago
9

All define the cell theory except:

Biology
1 answer:
Aleonysh [2.5K]3 years ago
6 0

Answer:

letters b and d don't define the cell theory

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If 1/8 remains after 21 years, what is the half-life?
vagabundo [1.1K]

Half life formula

The number of unstable nuclei remaining after time t can be determined according to this equation:

N(t) = N(0) * 0.5^(t/T)

where:

N(t) is the remaining quantity of a substance after time t has elapsed.

N(0) is the initial quantity of this substance.

T is the half-life.

It is also possible to determine the remaining quantity of a substance using a few other parameters:

N(t) = N(0) * e^(-t/τ)

N(t) = N(0) * e^(-λt)

τ is the mean lifetime - the average amount of time a nucleus remains intact.

λ is the decay constant (rate of decay).

All three of the parameters characterizing a substance's radioactivity are related in the following way:

T = ln(2)/λ = ln(2)*τ

How to calculate the half life

Determine the initial amount of a substance. For example, N(0) = 2.5 kg.

Determine the final amount of a substance - for instance, N(t) = 2.1 kg.

Measure how long it took for that amount of material to decay. In our experiment, we observed that it took 5 minutes.

Input these values into our half life calculator. It will compute a result for you instantaneously - in this case, the half life is equal to 19.88 minutes.

If you are not certain that our calculator returned the correct result, you can always check it using the half life formula.

8 0
3 years ago
What are the levels of structural organization in the body of a shark
aalyn [17]
These include the chemical. cellular. tissue organ. organ system and the organism level
3 0
3 years ago
Describe the possible effect of not getting enough sunlight each day
natka813 [3]
You absorb vitamin d from sunlight shining on your skin.
Vitamin d can help the absorption of calcium, which is capable for strengthening your bones and teeth.
Therefore if u r lacking of vitamin d, your bones and teeth may be soft, and especially among children, you may get ricket, where the legs are bent outwards.
6 0
3 years ago
A student is learning about the functions of leukocytes. What statements about these cells are correct
Ksivusya [100]
<h2>What are leukocytes?</h2>

Leukocytes are colorless cells that circulate in the blood and belongs to the body's immune system and helps the body fight infections and other diseases.

<h2>What is their function?</h2>

Leukocytes are responsible for fighting other diseases and protecting your body from infections. Since they are part of the immune system, leukocytes circulate your blood and help cure injuries or illness.

8 0
2 years ago
BRAINLIESTTT ASAP!!!!
Igoryamba

When animals undergo the process of cellular respiration, they release carbon dioxide into the atmosphere. And when animals die and start to decay aided by organisms called decomposers, carbon dioxide is also emitted into the atmosphere. When humans burn fossil fuels, carbon dioxide yet again enters the atmosphere. 

<em>hope this helps ;)</em>

5 0
3 years ago
Read 2 more answers
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