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lisov135 [29]
4 years ago
11

Strontium has how many neutrons

Physics
2 answers:
Lilit [14]4 years ago
7 0

Answer:

50

Explanation:

timofeeve [1]4 years ago
6 0
Strontium had 50 neutrons
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Describe the difference between the three states of matter in terms of movement behavior at room temperature and how they intera
yuradex [85]

In solids, the atoms are closely bound to each other. The only movement possible for the atoms in this state of matter is vibration. Solids have a fixed shape. Therefore when they are put in a container, the solids remain in their initial shape.

In liquids, the atoms are loosely bound compared to atoms in solid. And the atoms are free to vibrate and to slide past each other. The liquids have fixed volume but have no fixed shape. Therefore, when they are poured into a container, their volume will be the same, but the liquid will take the shape of the container.

In gas, the atoms are very loosely bound. and the atoms are very free to vibrate and move through space. Gases do not have either fixed volume or a fixed shape. Therefore, when they are poured into a container they take the volume and the shape of the container.

5 0
1 year ago
If the resultant of two velocity vectors of equal magnitude is also of the same magnitude, then which statement must be correct?
Tamiku [17]

The correct option is C) The angle between the vectors is 120°.

Why?

We can solve the problem and find the correct option using the Law of Cosine.

Let A and B, the given two sides and R the resultant (sum),

Then,

R=A=B

So, using the law of cosines, we have:

R^{2}=A^{2}+B^{2}+2ABCos(\alpha)\\ \\A^{2}=A^{2}+A^{2}+2*A*A*Cos(\alpha)\\\\0=A^{2}+2*A^{2}*Cos(\alpha)\\\\Cos(\alpha)=-\frac{A^{2}}{2*A^{2}}=-\frac{1}{2}\\\\\alpha =Cos(-\frac{1}{2})^{-1}=120\°

Hence, we have that the angle between the vectors is 120°. The correct option is C) The angle between the vectors is 120°

Have a nice day!

4 0
3 years ago
A skateboarder is accelerating forward.
kompoz [17]

Answer:

i dont really understand but when you accelerate you move faster. So i guess the skateboarder is moving fast forward

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Which illustrates projectile motion?
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Answer:

Ans is (B) driving a rock from a building

7 0
3 years ago
alayn h uderstands the half life of a certain substance is 90days. how long would it take for 80lbs of her substance to be reduc
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135 days...............

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