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Ede4ka [16]
4 years ago
11

Pls help me pls I’ll be glad

Physics
1 answer:
Akimi4 [234]4 years ago
5 0

Answer:

1.)A 2.) C

Explanation:

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A 2.0 kg tumor is being irradiated by a radioactive source.The
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Answer:

426136363636.36365 Bq

Explanation:

Grays = 12

Mass = 2 kg

Time = 880

Energy = 0.4 MeV

Activity is given by

Activity=\dfrac{Grays\times Mass}{Time\times 0.4}\\\Rightarrow Activity=\dfrac{12\times 2}{880\times 0.4\times 1.6\times 10^{-13}}\\\Rightarrow Activity=426136363636.36365\ Bq

The activity N//t of the radioactive source is 426136363636.36365 Bq

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4 years ago
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krok68 [10]

Please see attached picture for answer an explanation.

6 0
3 years ago
Which two objects have stored energy?
shepuryov [24]

a ball rolling on the ground

8 0
3 years ago
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If the electrons are attracted more by the nucleus because of an additional proton, what would happen to it?
Rus_ich [418]

Answer:

orbital speed of the electrons in their orbit will increase

Explanation:

As we know that centripetal force for electrons will be due to electrostatic attraction force of electron.

So it is given as

F_e = F_c

so we have

\frac{(Ze)(e)}{4\pi \epsilon_0 r^2} = \frac{mv^2}{r}

now on the left side if the force of attraction will increase and hence there must be the change in that part of equation

So here at the same position the speed of the electron

So we can say that correct answer will be

orbital speed of the electrons in their orbit will increase

4 0
3 years ago
Frosty the Snowman accelerates from 16 m/s to 26 m/s in 2 s. What is his acceleration?
Alex_Xolod [135]

Answer:

his acceleration is 3.25

Explanation:

because you do 26÷16 which =1.625×2=3.25

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3 years ago
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