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2 years ago

If I start with an 30 gram sample of Plutonium-244, how many grams would be left of Plutonium-244 after 1 half life

Physics

1 answer:

andriy [413]2 years ago

4 0

Answer:

15 g

Explanation:

Given,

Plutonium-244 = 30 g

We have to find the gram of Plutonium-244 left after 1 half-life.

We know that the half-life of a radioactive isotope is constant. The half-life of a Radioactive isotope does not depend on the initial amount of isotope.

Now,

After 1 half-life

Plutonium-244 left = $\dfrac{30}{2}$

= 15 g

Hence, 15 g of the Plutonium-244 will be left after 1 half-life.

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1 year ago

Which will have a larger momentum when moving at the same speed: a 2,000-kg truck or a 1,000-kg sedan

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Answer:

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That is,

Momentum = mass × velocity

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2 years ago

A mouse jumps horizontally from a box of height 0.25m. If the mouse jumps with a speed of 2.1 m/s, how far from the box does th

Sladkaya [172]

The mouse would land 0.47 m away from the box.

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3 years ago

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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!

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2 years ago

Which system helps regulate fluids in the body?

Harman [31]

The answer is A. Urinary system

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2 years ago

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