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In-s [12.5K]
3 years ago
6

_______ or radioactive substance have a half life.

Physics
1 answer:
madam [21]3 years ago
4 0

Answer:

A radioactive element or radioactive substance have a half life

Explanation:

The half life of a radioactive element is defined as the time taken for the atoms of the radioactive elements to decay to half the original number

Radioactive decay

Radioactive decay simply the process by which the nucleus of a heavy radioactive element disintegrates and emits alpha or beta particles along with Gama rays

Law of radioactivity

The law states that when a radio active element decays or disintegrates it forms a new element two places below in the periodic table with emission of alpha particles or two places above the element in the periodic table with emission of beta particle.

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Two forces one of 12N and another of 5N act on abody in such away that they makes an angel of 90 with each other, what is the re
Murljashka [212]

Answer:

13 N

Explanation:

From the question,

If two forces act at right angle to each other, Their result force can be calculated using Pythagoras theorem.

R'² = R₁²+R₂²....................... Equation 1

Where R' = Resultant force, R₁ = First force, R₂ = Second force.

Given: R₁ = 12 N, R₂ = 5 N

Substitute these values into equation 1

R'² = 12²+5²

R'² = 144+25

R'² = 169

R' = \sqrt{169}

R' = 13 N.

Hence the resultant force is 13 N

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3 years ago
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Answer:

visible light

Explanation:

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3 years ago
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A spring is stretched 5 cm from its equilibrium position. If this stretching requires 30 J of work,
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Answer:

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2 years ago
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Explanation:

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HOPE THIS helps

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