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3 years ago

14

Ernesto brought plastic tubes that are each 5.3 meters long. If Ernesto makes a line of 18 tubes by placing the end-to-end, how

long will it be?

1 answer:

VARVARA [1.3K]3 years ago

3 0

5.3×18=95.4 meters. you multiply it because you are trying to find the full length.

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1. The function of lenses is based on the law of refraction. A light beam is traveling from the medium 1 where its speed is V1,

masha68 [24]

Answer:

The index of refraction for Medium 2 would be 1.25

Step-by-step explanation:

We have the following data:

Speed of light in Medium 1 = V₁

Speed of light in Medium 2 = V₂

The speed of Light in Medium 2 is related to speed of light in Medium 1 as:

V₂ = 0.8 V₁

Moreover, it is given that Medium 1 is air with index of refraction equal to 1. i.e.

n₁ = 1

We need to find the index of refraction for medium 2. Lets name it is as n₂.

Snell's law related the above mentioned 4 quantities by following relation:

The ratio of indices of refraction of 2 mediums is equivalent to the reciprocal of ratio of phase velocities in those 2 mediums. Mathematically, this can be written as:

$\frac{n_{1}}{n_{2}} = \frac{V_{2}}{V_{1}}$

Substituting the values we have gives us:

$\frac{1}{n_{2}}=\frac{0.8V_{1}}{V_{1}} \\\\\frac{1}{n_{2}}=0.8\\\\ 1=0.8n_{2}\\\\\frac{1}{0.8}=n_{2}\\\\ n_{2}=1.25$

This means, the index of refraction for Medium 2 would be 1.25

3 0

3 years ago

I NEED HELPPP is it 112 or 56 ?????

11Alexandr11 [23.1K]

The answer is 56!
Please mark brainliest

7 0

3 years ago

which number is equivalent to 3 to the 4th power over 3 to the 2nd power (its a fraction thats why i said over)

Westkost [7]

So you know that 3^4 is your numerator and that is (4)(4)(4)(4)=81
3^2 is your denominator and that is (3)(3)=9
81/9
=9

7 0

3 years ago

3. What kind of triangle is represented by the triangle shown below?

krek1111 [17]

Answer:

Isosceles

Step-by-step explanation:

An Isosceles triangle has an acute angle (less than 45°), and this photo shows a triangle with two matching sides with one side being longer.

A right triangle would have a 90° angle which this photo doesn't have

An Equilateral triangle has all 60° sides, since it doesn't have all matching sides, it cannot be the answer.

A Scalene triangle is similar to this photo except it has 30° 60° and 90° angles, which this photo doesn't have.

I hope this helps!

5 0

1 year ago

Solve 2g - 13 = 3.<br> g=

iVinArrow [24]

Answer:

8

Step-by-step explanation:

2g = 3 + 13

2g = 16

g = 16/2

g = 8

8 0

3 years ago

Read 2 more answers