Americium-241 is widely used in smoke detectors. Calculate the amount of americium-241 consumed in a smoke detector (initially containing 5. 00 µg of am) that has been used for one year if the half-life is 433 years.

Answers

Answer 1

0.008 μg of americium-241 was consumed in a smoke detector

The half life of a substance is:

[tex]N=N_o(\frac{1}{2} )^\frac{t}{t_\frac{1}{2} } \\\\Where\ N\ is\ the \ amount \ of\ substance\ remaining\ after\ t\ years,\\N_o\ is\ the\ original\ amount, t_\frac{1}{2} \ is\ half\ life.\\\\\\Given\ N_o=5\ \mu g,t=1\ year,t_\frac{1}{2} =433\ years. Hence:\\\\N=5*10^{-6}(\frac{1}{2} )^\frac{1}{433} =4.992\ \mu g[/tex]

The amount consumed = 5 - 4.992 = 0.008 μg

0.008 μg of americium-241 was consumed in a smoke detector.

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Which of the following describes the zeroes of the graph of f(x) = 3x6 30x5 75x4?.

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Answer:

Explanation:

f(x) = 3x6 30x5 75x4?.

Answer

the 4th option

Explanation:

An astronaut takes what he measures to be a 10-min nap in a space station orbiting earth at 8000 m/s. A signal is sent from the station to earth at the instant he falls asleep, and a second signal is sent to earth the instant he wakes.

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Answer:

The astronaut was asleep longer on earth then he was in space

Explanation:

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If a dog has 72 chromosomes how many chromosomes will each daughter cell have.

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Answer:

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Explanation:

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Answer:

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Explanation:

hope this helps

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What is the importance of Stretching?

There are different means of doing exercises such as skipping, running, push ups, sit ups, planks, stretching, jogging e.t.c

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Thus, we can conlcude that the benefits of stretching include all the given options.

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The following is a chemical reaction for _______ with ozone. Reaction 1: C l O B r O right-arrow C l B r O 2. Reaction 2: C l O 3 right-arrow C l O O 2. Reaction 3: B r O 3 right-arrow B r O O 2. A. Chlorofluorocarbons b. Halons c. UV radiation d. None of the above.

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Answer:

B

Explanation:

The ozone is being broken up in the second and third, which indicates halons. Halons destroy ozone and extinguish fires.

Answer:

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Explanation:

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Based on the description given in the question, Peking face-paint is also known as Jingju lianpu that is done with different colors by the performing characteristics personality and historical assessment.

What is Peking face paint?

Peking faces paint is famous for being one of the most colorful facial make-up.

Peking face-paint is usually carried out during traditional Perking opera on-stage actors. These actors perform roles referred to as Jing.

Hence, in this case, it is concluded that the correct answer is Peking face-paint.

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Which of the following is not the benefit of recycling?.

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Answer choice where are they?

Which lines from the passage present the most likely reason that theodora’s attitude changes?.

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The lines from the passage refers to a change in Theodora's attitude towards divorce law.

She made some amendments to the law in order to provide benefit to young girls who are suffering from masculine powers.

She was also against the girls trafficking and she saved young girls from being victim of human trafficking. She was the first ruler to recognize rights of woman.

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Next year baldwin plans to include an additional performance bonus of 0. 25% in its compensation plan. This incentive will be provided in addition to the annual raise, if productivity goals are reached. Assuming the goals are reached, how much will baldwin pay its employees per hour?.

Answers

Answer:

Total raise = 5% + 0.25% = 5.25%

Present wages = $28.15

Baldwin will pay = $28.15 (1.0525) = $29.63

Explanation:

What are the victims of the Guerra Sucia called? "victimones" "The Bad Ones" "The Disappeared" "Unlucky Few".

Answers

The disappeared is a term used for people who are missing. The victims of the Guerra Sucia called The Disappeared

Desaparecidos as it is popularly called is a name synonymous to South America. It simply means when an individual is not seen anymore, and most times presumed dead or killed anyone.

This world is used mostly by Latin America to imply that a particular person has been secretly imprisoned or killed during a government's vendetta of political suppression.

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Answer:

"The Disappeared"

Explanation:

In a school 2/3 of the students study a language.

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Theeeen???

1/3 students study another subject

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Answer:

Yes

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Answer:

I don't know answer what

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What is partial pressure?

When more than one gas is present in a container, each gas exerts pressure, which is known as partial pressure. Its partial pressure refers to the pressure of any gas inside the container.

Partial pressures can be calculated in one of two ways:

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What is the ratio of the area of ABC to the area of ABD? A. B. C. D.

Answers

Answer:

Explanation:

area ABD = 16*12/2  

area ABC = 9*12/2

------------------------------

so the ratio of the area ABC to the area of ABD = (9*12/2)/(16*12/2) =  

= 9/16  

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mark me brainliest :D

The ratio of the area of ABC to the area of ABD is 9/16. The correct option is B.

What is the area?

The space occupied by any two-dimensional figure in a plane is called the area. The space occupied by the triangle in a two-dimensional plane is called the area of the triangle.

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A = ½ (b × h)

The two areas will be calculated as:-

Area ABD = ( 1 / 2 )  x 16  x  12

Area ABC = (1 / 2 ) x  9  x  12

So the ratio of the area ABC to the area of ABD will be

= [ ( 1 / 2)  x 16  x  12 ]  ÷  [ (1 / 2 ) x  9  x  12 ]

=  9 / 16

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The question is incomplete. Your most probably complete question is given below:

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Answer:

Emily must have permission from her parents in order to furnish the information to the website.

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Answer:

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He died by  s triyng to feed his starving family. THe picture was meant to raise money for his family.

Wardy Joubert III August 30, 1971 – December 11, 2016, often known as Wood, was an American sermonized and football manager who became the subject of a 2012 internet meme.

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Answer:

answer is b only

Explanation:

Answer:

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Explanation:

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Answers

Answer:

If a person belonging to a specific region and culture breaks a norm or set of rules that are set by the leaders or his ancestors then it is termed as deviance. While, any person relating to some culture might not think the same. That is due to difference any perception of the different individuals belonging to different cultures and background

Explanation:

While, crime is more related to the universal rules and regulations. As if any person commits a murder, or the criminal is involved in sort of robbery or any of the inhumane activities then he will face the court. So crimes are the offenses which are not associated with any specific culture.

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Explanation:

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Explanation:

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Answer:

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Answer:

2Na + Cl2 → 2NaCl

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Explanation:

Edge Answer :)

Answer:

2NaCl and 2Mg + O2

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A and B got it right on edg :)

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Answers

Answer:

Yes

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Hope it helps()()()()*)())*)*)*;*)*;)
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