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Nina [5.8K]
3 years ago
7

A sample contains 10 g of a radioactive isotope. How much radioactive isotope will remain in the sample after 2 half-lives?

Physics
2 answers:
xxMikexx [17]3 years ago
5 0
The answer c - Half life how to figure, you first divide it by half then divide than number by half
k0ka [10]3 years ago
3 0

Answer:

c) 2.5 g

Explanation:

half-life is the time it takes the radioactive isotope to decay to half of the intial sample.

so if the isotope decays to 2 half-lives, it will decay half the intial sample twice.

in the first half-life, the sample will decay from 10 g to 5 g. during the second half-life, the isotope will decay from 5 g to 2.5 g.

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An ideal pendulum is often discussed when studying simple harmonic motion. What are the conditions needed for an ideal pendulum?
vlada-n [284]

Complete question is;

An ideal pendulum is often discussed when studying simple harmonic motion.

What are the conditions needed for an ideal pendulum? Check all that apply.

1) Gravitational force acts to pull the pendulum’s mass down.

2) The mass of the rod of the pendulum is evenly distributed along the rod.

3) The pivot on which the pendulum swings is frictionless.

4) The pendulum swings through its equilibrium position as a result of inertia.

5) Tension acts downward on the pendulum’s mass

Answer:

Conditions 2,3 & 4 are the ones that apply

Explanation:

The conditions required for an ideal pendulum are;

- The mass of the rod of the pendulum has to be evenly distributed along the rod.

- Ensure that the pivot on which the pendulum is swinging is frictionless

-The pendulum has to swing through it's equilibrium position as a result of inertia.

Thus,the correct options are 2, 3, 4.

6 0
3 years ago
Read 2 more answers
Could anyone help me with this?
tatiyna

Answer:

Answer is option C..

Mark as brainlist

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2 years ago
What is the momentum of a 20 kg object traveling at a rate of 5 m/s
Arlecino [84]
100 as momentum=mass×velocity
3 0
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Gnb technologies manufactures lead-acid batteries, and enlists ups for assistance with its supply chain. ups also helps the comp
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The company's method used in its marketing strategy as what is described in the description would be reverse logistics. In addition, a reverse logistics technique mainly involves re-using the company's products produced for the reason of properly disposing in, and could be used as another resource for future productions.
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3 years ago
A 12 kg block is accelerating at the rate of 9.0 m/s? while being acted on by two forces.
Aliun [14]

Answer:

See below

Explanation:

F = ma

F = 12 * 9 = 108 N

  108 N  needed      <u> add  30 N more east </u>

8 0
1 year ago
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