3 years ago

What is the definition of Amplitude?

Chemistry

1 answer:

katen-ka-za [31]3 years ago

4 0

Answer:

the maximum extent of a vibration or oscillation, measured from the position of equilibrium.

Explanation:physics

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a 160 milligram sample of a radioactive isotope decays to 10 kilograms in 12 years. what is the half life of this element

Shkiper50 [21]

Answer:

3 years

Explanation:

Given data:

Initial amount of sample = 160 Kg

Amount left after 12 years = 10 Kg

Half life = ?

Solution:

at time zero = 160 Kg

1st half life = 160/2 = 80 kg

2nd half life = 80/2 = 40 kg

3rd half life = 40 / 2 = 20 kg

4th half life = 20 / 2 = 10 kg

Half life:

HL = elapsed time / half life

12 years / 4 = 3 years

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Explain in a short sentence how you can tell a reaction is a decomposition reaction.

mr Goodwill [35]

Answer: A decomposition reaction occurs when one reactant breaks down into two or more products.

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2 years ago

Which two structures would provide a positive identification of a plant cell under a microscope

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Lysosome, central vacuole

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Which of these is an example of a physical change?

Luda [366]

The answer is D) wood decaying

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What is measured by the reaction rate? the probability that a reaction will occur the speed at which products form the time requ

Cloud [144]

Answer: the speed at which products form

Explanation:

Rate of a reaction is defined as the speed at which a chemical reaction proceeds. It is often expressed in terms of the concentration of a reactant that is consumed in a unit time or the concentration of a product that is formed in a unit of time.

For a general reaction : $A\rightarrow B$

$Rate=-\frac{d[A]}{dt}$

or $Rate=+\frac{d[B]}{dt}$

where d[A] = change in concentration of reactant A

d[B] = change in concentration of product B

dt = time interval

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3 years ago