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NeX [460]
2 years ago
8

The half-life for P-32 is 14.3 days. What fraction of a sample of P-32 will be left after 42.9 days?

Physics
1 answer:
mafiozo [28]2 years ago
6 0

Answer: At one half-life (14.3 days) 230 mg of the P-32 would remain. at two half-lives (14.3 + 14.3 or 28.6 days) 115 mg of the P-32 would remain. at three half-lives (14.3 + 14.3 + 14.3 or 42.9 days) 57.5 mg of the P-32 would remain.

Explanation:

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Answer:the

8/9 h

Explanation:

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What is the purpose of the wire coil in an electromagnet?
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3 years ago
A spinning wheel is slowed down by a brake, giving it a constant angular acceleration of ?5.20 rad/s2. during a 3.80-s time inte
ddd [48]

<span>We can answer this using the rotational version of the kinematic equations:</span><span>
θ = θ₀ + ω₀<span>t + ½αt²     -----> 1</span></span>

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Where:

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ω₀ = initial angular speed

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α = angular acceleration = -5.20 rad/s^2

Substituting the values into equation 1:<span>
70.4 = 0 + ω₀(3.80) + ½(-5.20)(3.80)² </span><span>

ω₀ = (70.4 + 37.544) / 3.80 </span><span>

ω₀ = 28.406 rad/s </span><span>


Using equation 2:
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</span>

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3 years ago
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crimeas [40]

Answer:

The emission spectrum is always the same and can be used to identify the element and part of the Bohr model proposed that electrons in the hydrogen are located in particular orbits around the nucleos are True.

Explanation:

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<u>Summering up, </u>we can identify elements using the emission spectrum because any element produces the same spectrum than other element.

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The answer is calcium. I just did it and it was correct
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