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3 years ago

What do you mean by snell law

Physics

1 answer:

zloy xaker [14]3 years ago

6 0

Answer:

Explanation:

a law in physics: the ratio of the sines of the angles of incidence and refraction is constant for all incidences in any given pair of media for electromagnetic waves of a definite frequencya law in physics: the ratio of the sines of the angles of incidence and refraction is constant for all incidences in any given pair of media for electromagnetic waves of a definite frequency

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Open the Earth Science textbook to page 239 and summarize what “Wegener’s Hypothesis” is.

solniwko [45]

Alfred Wegener first presented his hypothesis to the German Geological Society on 6 January 1912. His hypothesis was that the continents had once formed a single landmass, called Pangaea, before breaking apart and drifting to their present locations.

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4 years ago

Why are valence electrons so important?

natka813 [3]

Answer:

B. They are the electrons that interact with other atoms.

Explanation:

Valence electrons are the electrons in the outermost shell of an atom. These electrons are used by atoms to form bonds with other atoms during chemical bonding.

So, the basis by which atoms interacts with one another is through the valence electrons.
Without the valence electrons, atomic combination to form compounds would not be possible.
Valence electrons are the most loosely held electrons and they have the lowest ionization energy.

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3 years ago

Find the average net force.

Lerok [7]

Answer:

<h2>given</h2>

mass= 3.5 kg

distance covered= 0.4m

inital speed = 1.5 m/sec

final speed = 0 m/sec

net force

<h2>solution</h2>

formula for force :

$\fbox{f = m.a}$

In order to find the force we need to find the acceleration.

According to third equation of Kinematics-

$\bold{ {v}^{2} = {u}^{2} + 2as}$

where,

v= final velocity

u=inital Velocity

a=Acceleration

s=Distance covered

put the value in the above equation

0= (1.5)²+ 2a x 0.4

-2.25= 0.8a

a = -2.25/0.8

a= - 2.8125 m/sec²

now put the value 0f accleration in formula of force

F = 3.5 x - 2.8125

F= -9.84375 N

6 0

3 years ago

At what distance above the surface of the earth is the gravitational field 4.9 m/s^2

san4es73 [151]

That's 1/2 of what it is on the surface.

The distance between the center of the Earth and any object
on the surface is 1 Earth radius ... about 3960 miles.

Gravitational force is inversely proportional to the square of
the distance between the centers of the objects, so in order
to reduce the acceleration of gravity by 1/2, you increase the
distance by √2 .

   (3960 miles) x (√2) = 5,600 miles from the center

   = 1,640 miles above the surface.

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4 years ago

The young boxer has sustained a blowout fracture of his left orbital complex. the orbit that contains the eye is formed by seven

Neporo4naja [7]

The frontal bone.

A blowout fracture is one where the orbit of the eye socket is damaged. This type of fracture is usually accompanied by double vision, depressed ocular globes and loss of feeling in the cheeks. Bones other than the frontal bone which are responsible for the structure of the eye socket are the zygomatic bone and the maxilla.

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3 years ago

What do you mean by snell law​

What do you mean by snell law