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seropon [69]
3 years ago
12

Sam got 10 cookies and his sister took 3 away from him. How much does sam have left?​

Chemistry
1 answer:
Julli [10]3 years ago
4 0

Answer:

he would have 7 cookies left.

Explanation:

This is because 10 - 3 = 7

If you have any questions feel free to ask in the comments - Mark

ALSO Happy Valentines Day ❤

 

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Naturally occurring neon exists as three isotopes. 90.51% is ne-20 with a mass of 19.99 amu, 0.27% is ne-21 with a mass of 20.99
gregori [183]

The atomic mass of an element is the average relative mass of its atoms as compared with an atom of carbon-12 whose mass is taken as 12. In terms of percentages of different isotopes, the average atomic mass can be determined as follows: A_{average} = ∑(p_{i}X A_{i})/100. Where, p_{i} is the percentage abundance of isotope with atomic number A_{i}.

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3 0
3 years ago
Calculate the pressure exerted by an book of mass 20kg occupying an area of 2 m square.​
kotykmax [81]

The answer is 100 Pa.

The formula for calculating pressure is :

<u>Pressure = Force ÷ Area</u>

<u />

We are given that :

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We also know that :

<u>Force = mass ×g</u>

<u />

So, force will be :

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Now, we can finally calculate pressure :

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The correct option is;

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