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hram777 [196]
3 years ago
14

Find the period of an electromagnetic wave of wavelength 2.20 × 10–2 m. A. 1.36 × 1010 s c. 7.33 × 10–11 s b. 4.54 × 101 s d. 6.

60 × 106 s
Mathematics
1 answer:
vovangra [49]3 years ago
4 0

Answer:

7.33 * 10^-11 s

Step-by-step explanation:

Period, T = 1 / f

c = fλ

λ = 2.20 × 10^–2 m

c = speed of light = 3 * 10^8 m

f = c / λ

f = 3 * 10^8 ÷ 2.20 × 10^–2 m

f = (3/2.2) * 10^(8-(-2))

f = 1.364 * 10^10

T = 1/f

T = 1 / 1.364 * 10^10

T = 7.33 * 10^-11 s

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Pile Y has the greater mean number of pages per book because it is 5 books less than pile W.

<h3>How to calculate greater mean number of pages?</h3>

From the complete information, we can deduce that the number of each pile of book is given as follows:

<u>For pile W;</u>

Red books = 10 × 5 = 50 red books.

Blue books = 5 × 5 = 25 blue books.

Therefore, total books in pile W = 50 + 25 = 75 books.

Mathematically, the mean for each pile can be calculated by using the following formula:

Mean = [F(x)]/n

Mean = 75/10

Mean = 7.5.

<u>For pile Y;</u>

Red books = 10 × 5 = 50 red books.

Mean = [F(x)]/n

Mean = 50/5

Mean = 10.

In conclusion, pile Y has the greater mean number of pages per book because it is 5 books less than pile W.

Read more on mean here: brainly.com/question/9550536

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Solve for the value of x :-<br>5(x+4)+5(2-x)​
Mariulka [41]

Answer:

30

Step-by-step explanation:

Given expression:

5(x + 4) + 5(2 - x)

Note: <em>The value of "x" is undefined because the given sum is not an equation. Thus, I will simplify the expression as much as possible. </em>

Let us simplify all the distributive properties stated in the expression.

Apply the distributive property rule <u>[a(b + c) = ab + ac]</u>

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Since 5(x) is being subtracted from 5(x), we get:

\implies 5(x) + 5(4) + 5(2) - 5(x)

\implies 5(4) + 5(2)

Finally, let us simplify the sum of the product of (5 and 4) and (5 and 2).

\implies20 + 10

\implies \boxed{30}

Learn more about one-variable expressions: brainly.com/question/15139917

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