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4 years ago

If the speed of light is 310^8m/s, calculate the frequency of the light if the wavelength is 7.8010^-7?

Mathematics

1 answer:

maksim [4K]4 years ago

7 0

Answer:

3.84x10^14Hz

Step-by-step explanation:

From the question, the following were obtained:

Velocity = 3x10^8m/s

Wavelength = 7.80x10^-7

Frequency =?

Frequency = Velocity /wavelength

Frequency = 3x10^8/7.80x10^-7

Frequency = 3.84x10^14Hz

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3 years ago

Find two consecutive odd integers such that seven times the first equals five times the second.

fredd [130]

Answer:

Odd integers are always one more that an even integer:

1st: 2n+1

2nd: 2n+3

Step-by-step explanation:

14n+7 = 10n+15

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n = 2

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1st: 2n+1 = 5

2nd: 2n+3 = 7

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7x=5x+10

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3 years ago

What is the value of x in the equation 4 . 10 X+52 3 +35x+1 5 ?<br><br>:)

pashok25 [27]

Answer:

$x=-3$

Step-by-step explanation:

Given:

$4\frac{3}{10}-(2\frac{2}{5}x+5\frac{1}{2})=\frac{1}{2}(-3\frac{3}{5}x+1\frac{1}{5})$

Distribute to remove parentheses:

$4\frac{3}{10}-2\frac{2}{5}x-5\frac{1}{2}=-\frac{18}{10}x+\frac{6}{10}$

For simplification and clarity, reduce all mixed numbers to simplified common fractions:

$\frac{43}{10}-\frac{12}{5}x-\frac{11}{2}=-\frac{9}{5}x+\frac{3}{5}$

Combine like terms:

$-\frac{12}{5}x-\frac{6}{5}=-\frac{9}{5}x+\frac{3}{5}$

Add 6/5 to both sides, then add 9/5x to both sides:

$-\frac{3}{5}x=\frac{9}{5}$

Divide both sides by -3/5 to isolate x (recall dividing by a number is equal to multiplying by its reciprocal):

$x=\frac{9}{5}\cdot -\frac{5}{3}, \\x=\frac{-9}{3},\\x=\boxed{-3}$

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3 years ago

What is the area of the composite figure? 262 cm2 264 cm2 266 cm2 268 cm2

miv72 [106K]

The Area is a two-dimensional scalar quantity. The area of the composite figure is 264 cm².

The area of a two-dimensional region, form, or planar lamina in the plane is the quantity that represents its extent. On the two-dimensional surface of a three-dimensional object, the surface area is its counterpart.

The composite figure can be broken down into four parts a square(A), a triangle(B) and two rectangles(C and D).

Now, if the area of the composite figure is taken out it will be,

$\text{Area of composite}=\text{Area of Square A} + \text{Area of triangle B} + \text{Area of Rectangle C} + \text{Area of Rectangle D}\\$

$\text{Area of Composte}=(10^2)+(\dfrac12 \times 6 \times 4)+(8 \times 4)+(20 \times 6)\\\\\text{Area of Composte}= 100+ 12 + 32 + 120 =264\rm\ cm^2$

Thus, the area of the composite figure is 264 cm².

Learn more about the Area:

https://brainly.in/question/14759304

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2 years ago

Whats the awnser for the question of juan buys 18 meters of wire. He cuts the wires into pieces that are 3 meters long . How man

3241004551 [841]

Answer:

6 pieces

<em>18 divided by 3 equals 6. :) Hope this helps. </em>

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3 years ago

Read 2 more answers

If the speed of light is 3*10^8m/s, calculate the frequency of the light if the wavelength is 7.80*10^-7?

If the speed of light is 310^8m/s, calculate the frequency of the light if the wavelength is 7.8010^-7?