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bixtya [17]
3 years ago
13

Light rays bend as they pass from air into water at an angle (not 90 degrees). this is refraction. air water normal incident ray

refracted ray which quantity doesn't change when light refracts?
Physics
1 answer:
xxTIMURxx [149]3 years ago
7 0

When light ray pass from air into water, its speed and wavelength change only the frequency of the light doesn't change.

Light travels slower in a medium of higher refractive index. It bends because of this change in speed. The wavelength of light also changes in order to maintain the constant frequency.

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A classic demonstration illustrating eddy currents is performed by dropping a permanent magnet inside a conducting cylinder. The
kvv77 [185]

Answer:

The correct solution is "0.69 N".

Explanation:

The given values are:

Mass of magnet,

m = 70 g

or,

   = 0.07 kg

Width,

= 1.0 cm

Velocity,

= 10 cm/s

Length of the pipe,

= 80 cm

Whenever the velocity is constant, then the net force which is acting on the magnet will be "0".

On the magnet,

The up-ward force will be:

⇒  F=mg

On substituting the values, we get

⇒      =0.07\times 9.8

⇒      =0.69 \ N

4 0
3 years ago
Distinguish between physical and chemical changes. Include examples in your explanations.
hram777 [196]

Answer:

<u>Chemical changes</u> are recognized when a substance changes its properties permanently and it cannot be the same substance as before.

Instead the<u> physical changes</u><u> </u>implies that if you can return to the same substance through a reverse process.

Explanation:

A chemical change is, by example, a combustion, if a sheet of paper burns, its result is ashes, the ashes cannot go back to being a sheet of paper because its properties changed, heat energy was generated that changed matter permanently.

A physical change, by example, is that of freezing water, the water becomes ice, but this can easily become water again if the temperature is increased, its properties do not change and the chemistry of the substance does not change.

6 0
2 years ago
What’s contact force ?
kodGreya [7K]

Explanation:

Contact force is any force that requires contact.  An object that exerts a force on another object by touching it is exerting a contact force.  Examples of contact force are friction and normal force.

Examples of a non-contact force are gravity and magnetism.

5 0
2 years ago
Read 2 more answers
PLZ HELP ME Which are not correct statements?
AURORKA [14]
<span>A. Boyle's law only works when the pressure is constant.
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Hope this helps!</span>
8 0
2 years ago
The successive ionization energies for an unknown element are listed below. To which family in the periodic table does the unkno
bagirrra123 [75]
<span>The jump from 1966 to 16347 is the largest one or simply we can say it is hard to lose the 3rd electron.Whereas, it is relatively easy to lose the first two electrons.

So there will be only 2 electrons in the outer most shell.

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</span><span>I2 = 1752 kj/mol</span>
4 0
2 years ago
Read 2 more answers
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