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Airida [17]
3 years ago
9

1.

Chemistry
1 answer:
Elenna [48]3 years ago
5 0
<h3>Answer:</h3>

B. The object moves some distance

<h3>Explanation:</h3>
  • Work is the product of force and distance.
  • Work is done on an object when a force is applied on the object making it move some distance.
  • For example; If a mason applies a force of 5 N to move a stone at a distance of 10 m, then the work done will be 50 Joules.
  • Applying a force on an object without making it move some distance then there is no work done.
  • Consider a boy pushing a wall really hard and the wall doesn't move even for a single inch, this means there is no work done.
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Answer:

Hey!

Your answer is element A

Explanation:

Using the graph, the element A's emission of radioactive particles ends approximately after 6 years...

A HALF-LIFE IS "HALF" OF THAT TIME PERIOD!

So if the radiation goes for 6 years the half-life is 6 divided by two which gives you 3 years!

The rest however have a longer half-life...

Because they all end at 14 yrs so their half-life in 7 years!

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<h2>10.03</h2>

Explanation:

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From the question we have

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We have the final answer as

<h3>10.03</h3>

Hope this helps you

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