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goblinko [34]
3 years ago
8

If the speed of light in a vacuum is twice that of the speed of light in a given material, what is the index of infraction for t

hat material?

Physics
2 answers:
Virty [35]3 years ago
6 0
I halved the speed of light in vacuum to get the speed of light in the material, since the speed of light in vacuum is twice the speed of light in material.

The index of refraction is essentially the speed of light through a vacuum divided by the speed of light through given medium.

I attached some notes on refraction too, hopefully this helps :D

Dovator [93]3 years ago
3 0

Answer:

Index of Refraction

Explanation:

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You walk 20 m north then 30 m west for a total timer four minutes what is the magnitude of your average velocity in (m/s)
Shalnov [3]

Answer:

The average velocity is 0.15 m/s

Explanation:

Use the definition of average velocity as the distance traveled divided the time it took.

Since the movement was on the plane from the origin (0, 0) to the point (-30, 20) corresponding to 30 m west and 20 m north, we calculate the distance using the distance between two points on the plane:

distance=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2} = \sqrt{(-30)^2+20^2} =\sqrt{1300} \approx 36.06\,\,m

Then the magnitude of the average velocity can be estimated via the quotient between distance divided time, but since the units required are meters per second, we first convert the four minute time into seconds: 4 * 60 = 240 seconds.

Then the average velocity becomes:

v_{ave}=\frac{distance}{time} =\frac{36.06}{240} =0.15\,\,m/s

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3 years ago
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2 years ago
Relate 1 radian to 1 degree.how much is 90 degree in terms of radian?​
bogdanovich [222]

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3 years ago
An electric dipole consists of charges +2e and -2e separated by 0.82 nm. It is in an electric field of strength 3.2 x 10^6 N/C.
Zepler [3.9K]

Explanation:

It is given that,

An electric dipole consists of charges +2e and -2e separated by 0.82 nm

Charge, q=2e=2\times 1.6\times 10^{-19}\ C=3.2\times 10^{-19}\ C

Distance between charges, d=0.82\ nm=0.82\times 10^{-9}\ m

Electric field strength, E=3.2\times 10^6\ N/C

(a) The magnitude of the torque on the dipole is given by :

\tau=p\times E\ sin\theta

When dipole moment is parallel to the electric field, \theta=0

\tau=p\times E\ sin(0)

\tau=0

(b) When the dipole is perpendicular to the electric field, \theta=90

\tau=pE\ sin(90)

\tau=qdE (Since, p = q × d)

\tau=3.2\times 10^{-19}\times 0.82\times 10^{-9}\times 3.2\times 10^6

\tau=8.39\times 10^{-22}\ N.m

(c) When the dipole moment is anti parallel to the electric field, \theta=180

\tau=pE\ sin(180)

Since, sin\ 180=0

\tau=0

Hence, this is the required solution.

8 0
3 years ago
 (a) How long can you rapidly climb stairs (116/min) on the 166.0 kcal of energy in a 200g apple? (b) How many flights is this
adoni [48]

Answer:

a) It will take you 16.94 min to climb the stairs.

b) The numbers of flights are 123 flights.

Explanation:

a) Let the energy consumption while climbing the stairs be 685 W in kcal/min is given by:

rate of energy consumption = (685 W)×[(0.01433kcal/min)/1 W]

                                               = 9.81605 kcal/min

the time it takes to climb the stairs is given by:

t = E/P

 = (166.0 kcal)/(9.8 kcal/min)

 = 16.94 min

Therefore, it will take you 16.94 min to climb the stairs.

b) Given t is the time it takes to climb stairs and N is the number of stairs to climb per min, then the number of stairs is:

n = t×N

  = (16.94)×(116)

  = 1965 stairs

given the number of stairs each flight as N1, then the number of flights is given by:

flights = n/N1

          = (1965)/(16)

          = 123 flights

Therefore, the numbers of flights are 123 flights.

7 0
3 years ago
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