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3 years ago

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How do scientist know how atoms are structured

1 answer:

GrogVix [38]3 years ago

4 0

Answer:

In the current model, the number of electrons in the atom is determined by gamma and x-ray spectroscopy. The number of protons in the atom is chosen to balance the charge of the electrons in the atom. The number of neutrons in the atom is chosen to give the correct atomic weight for the element in question.

Step-by-step explanation:

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The number of typographical errors on a page of the first booklet is a Poisson random variable with mean 0.2. The number of typo

muminat

Answer:

The required probability is 0.55404.

Step-by-step explanation:

Consider the provided information.

The number of typographical errors on a page of the first booklet is a Poisson random variable with mean 0.2. The number of typographical errors on a page of second booklet is a Poisson random variable with mean 0.3.

Average error for 7 pages booklet and 5 pages booklet series is:

λ = 0.2×7 + 0.3×5 = 2.9

According to Poisson distribution: $P(k{\text{ events in interval}})={\frac {\lambda ^{k}e^{-\lambda }}{k!}}$

Where $\lambda$ is average number of events.

The probability of more than 2 typographical errors in the two booklets in total is:

$P(k > 2)= 1 - {P(k = 0) + P(k = 1) + P(k = 2)}$

Substitute the respective values in the above formula.

$P(k > 2)= 1 - ({\frac {2.9 ^{0}e^{-2.9}}{0!}} + \frac {2.9 ^{1}e^{-2.9}}{1!}} + \frac {2.9 ^{2}e^{-2.9}}{2!}})$

$P(k > 2)= 1 - (0.44596)$

$P(k > 2)=0.55404$

Hence, the required probability is 0.55404.

4 0

3 years ago

HELP I AM TIMED AND EXPLAIN HOW YOU GOT IT

Illusion [34]

Answer:

C) p + 3 < 20

Step-by-step explanation:

Since the max is 20, it has to be < 20

p + 3 < 20

5 0

2 years ago

I need some DETAILED examples of Dividing Integers! Urgent, pls help ASAP!

vfiekz [6]

Here are some examples:

Integers are positive and negative numbers, but dividing integers are dividing positive and negative numbers:

Remember these rules:

Negative divided by a negative equals a positive.
Negative divided by a positive equals a negative.
Positive divided by a positive equals a positive .

Examples:

$-4 \div 2 = -2$
$-4 \div -4 = 1$
$4 \div 2 = 2$

Hope this helps!

8 0

3 years ago

If the following continuous or discrete : the total cost form buying gas at $2.75 per gallon

zimovet [89]

I wanna points hahahahaha

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2 years ago

ASAP!!!!!! I WILL GIVE BRANILST AND 200 POINTS! A 13 3/4 -inch candle burns down in 11 hours. If b represents how much of the ca

antoniya [11.8K]

I hope this helps :)

Your welcome

4 0

2 years ago

Read 2 more answers