All categories

4 years ago

When is the speed of light constant 299,792,458 meters per second? In air In water In any medium In a vacuum

Physics

2 answers:

wlad13 [49]4 years ago

8 0

Answer: In a vacuum

Explanation:

The speed of light in a vacuum is $299,792,458 m s$ but it is approximated to $3(10)^{8} m/s$ , and this value is a constant which has been denoted as $c$ .

However, in other media different from vacuum, the speed of light will depend on its molecular structure, specifically on its electromagnetic properties, its electrical permittivity and magnetic permeability.

In addition, it is important to note that in these materials or media different from vacuum, the speed of light will be less than $c$ and will depend on the medium's index of refraction.

Kazeer [188]4 years ago

7 0

Answer:

In a vacuum

Explanation:

I took the Test

You might be interested in

Name at least four factors involved in performing a good throw.

atroni [7]

Answer:

You need to have a good stance, release, power, speed, body, movement, and aim. You should be able to throw an effective pass or throw by using your body and having the correct amount of balance and form.

Explanation:

7 0

3 years ago

Why do we calculate the "range" of the measurments?

KatRina [158]

help show if a straight "trend line" represents the experimental data

6 0

3 years ago

Why is it important to use the correct number of significant digits when

Artemon [7]

Answer:

Explanation:

Scientists use significant figures to avoid claiming more accuracy in a calculation than they actually know.

6 0

3 years ago

Read 2 more answers

During the time a compact disc (CD) accelerates from rest to a constant rotational speed of 477 rev/min, it rotates through an a

atroni [7]

Answer:

126.01 rad/s^2

Explanation:

since it starts from rest, initial angular speed ω' = 0 rad/s

angular speed N = 477 rev/min

angular speed in rad/s ω = $\frac{2\pi N}{60}$ = $\frac{2*3.142* 477}{60}$ = 49.95 rad/s

angular displacement ∅ = 1.5758 rev

angular displacement in rad/s = $2\pi N$ = 2 x 3.142 x 1.5758 = 9.9 rad

angular acceleration $\alpha$ = ?

using the equation of angular motion

ω^2 = ω'^2 + 2 $\alpha$ ∅

imputing values, we have

$49.95^{2} = 0^{2} + (2 *\alpha*9.9 )$

2495 = 19.8 $\alpha$

$\alpha$ = 2495/19.8 = 126.01 rad/s^2

8 0

3 years ago

Would the springs inside a bathroom scale be more compressed or less compressed if you weighed yourself in an elevator that was

Ber [7]

More compressed. moving up = apparent weight (i.e., your norma force) is greater. this means you’ll weighr more and push those springs down even more than you would at rest.

6 0

3 years ago