Ask question

Ask question

All categories

4 years ago

15

Why do we say that light travels in straight lines? Is it strictly accurate to say that a laser beam provides a per- fectly stra

ight line for purposes of surveying? Explain.

1 answer:

Aliun [14]4 years ago

5 0

Answer:

Step-by-step explanation:

Light is considered to be without mass, but it has energy. According to Einstein, energy can be

equivalently presented as mass. Mass is also affected by gravity, but near planets, this effect is

so small that it can be ignored and so we say that light travels in a straight line.

The above statement does not hold true when light passes near a star. A star possesses a very

high gravity field that bends light such that the change of direction is observed.

You might be interested in

Is y = 5x − 3 a linear function? If so, graph the function.

labwork [276]

It is
If you have a slope (which is before the x) then it’s a linear equation

7 0

3 years ago

Plllzzz im new and i neeed help

ella [17]

Answer:

4082

Step-by-step explanation:

Given

The composite object

Required

The volume

The object is a mix of a cone and a hemisphere

Such that:

<u>Cone</u>

$r = 10cm$ ---- radius (r = 20/2)

$h = 19cm$

<u>Hemisphere</u>

$r=10cm$

The volume of the cone is:

$V_1 = \frac{1}{3}\pi r^2h$

$V_1 = \frac{1}{3}\pi * 10^2 * 19$

$V_1 = \frac{1900}{3}\pi$

The volume of the hemisphere is:

$V_2 = \frac{2}{3}\pi r^3$

$V_2 = \frac{2}{3}\pi 10^3$

$V_2 = \frac{2000}{3}\pi$

So, the volume of the object is:

$V = V_1 + V_2$

$V = \frac{1900}{3}\pi + \frac{2000}{3}\pi$

$V = \frac{3900}{3}\pi$

$V = 1300\pi$

$V = 1300 * 3.14$

$V = 4082$

8 0

3 years ago

See the attached image for the question

Tpy6a [65]

Answer:

2

Step-by-step explanation:

7/5 + 3/5 so 2 is the answer

5 0

3 years ago

What is the length of a prism that has a volume of 1344 cubic centimeters, a width of 8 centimeters, and a height of 12 centimet

Leni [432]

A.14 because you have to do 8*12*14 and it will give you 1344

6 0

4 years ago

Read 2 more answers

Archie is stranded in a war zone in the land of the Xhosas. His only chance of survival is to reach Sudland, which lies 100 mile

LenaWriter [7]

Answer:

The chances of success for Archie is $P(S|D) = 35\%$

Step-by-step explanation:

From the question we are told that

The distance of Sudland from Xhosas is d = 100 miles

The probability of failure is $P(F) = 0.26$

The probability of choosing the desert route is $P(D) = \frac{1}{40} = 0.025$

The probability of reaching Sudland through the mountain is $P(S|M) =0.75$

Generally the probability of choosing the mountains route is

$P(M) = 1 - P(D)$

$P(M) = 1 - 0.025$

$P(M) = 0.975$

Generally the probability of success is mathematically represented as

$P(S) = 1- P(F)$

$P(S) = 1- 0.26$

$P(S) = 0.74$

Generally the probability of success in reaching Sudland is also mathematically represented as

$P(S) = P(S|M) * P(M) + P(S|D) * P(D)$

=> $P(S|D) = \frac{P(S) - P(S|M) * P(M)}{P(D)}$

substituting values

=> $P(S|D) = \frac{0.74 - 0.75 * 0.975}{0.025}$

=> $P(S|D) = 0.35$

=> $P(S|D) = 35\%$

8 0

3 years ago