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2 years ago

Why isn't Coulomb's law valid for dielectric objects, even if they are spherically symmetrical?

Physics

1 answer:

marshall27 [118]2 years ago

4 0

Answer:

Explanation:

The "traditional" form of Coulomb's law, explicitly the force between two point charges. To establish a similar relationship, you can use the integral form for a continuous charge distribution and calculate the field strength at a given point.

In the case of moving charges, we are in presence of a current, which generates magnetic effects that in turn exert force on moving charges, therefore, no longer can consider only the electrostatic force.

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Light reflected from a glass surface is polarized along the plane perpendicular to the glass surface. Please select the best ans

leva [86]

I believe it would be true not 100% sure

7 0

3 years ago

Object A and Object B have the same volume of 10 cm³. Object A has a mass of 20 grams. Object B has a mass of 50 grams. Which ob

aniked [119]

Answer:

Object B has greater density

desity A=20/10=2 g cm^-3 . density B=50/10=5 g cm^-3

the object that has greater mass has the greater density because the volume of the those two objects are same

3 0

2 years ago

Two flat glass surfaces are separated by a 150-nm gap of air.

elena-s [515]

Answer:

a. 600 nm

b. 300 nm

Explanation:

According to the question it is given that there is two flat glass surface that is separated by 150nm air gap

Based on the above information

The computation is shown below

a. The bright thickness is

$t = \frac{\lambda}{2} (m - \frac{1}{2} )\\\\\lambda = \frac{2t}{(m - \frac{1}{2} )} \\\\\frac{2(150)}{(1 - \frac{1}{2} )} \\\\$

= 600 nm

b. The dark thickness is

$t = \frac{m\lambda }{2} \\\\\lambda = \frac{2t}{m} \\\\\frac{2(150)}{1}$

= 300 nm

7 0

2 years ago

A snowboard has a mass of 1.53 kg. What is the static frictional force on the snowboard if the

Zigmanuir [339]

Answer:

Static friction, F=2.9988 N

Explanation:

Static Friction: It is the friction between two or more solid body that are not moving relative to each other.

When an external force is applied to a body that is in contact with another body, static friction opposes the applied force upto a certain limit, keeping the body at rest. When the applied force exceeds the certain limit the body begins to move. At that moment applied force is equal to limiting value of static friction F.

It varies linearly with normal force(N)

F∝N

F=μN (where μ is constant of proportionality and known as coefficient of static friction)

Now,

Mass, m=1.53 kg

Coefficient of static friction, μ=0.2

Normal force, N=m×g

= $1.53\times9.8$ (g=9.8 m/s²)

=14.994 N

Static friction, F= μN

= $0.2\times14.994$

= 2.9988 N

5 0

2 years ago

What causes the tail of a comet to become visible?

nlexa [21]

Answer:

The correct answer is option C. Sun.

Explanation:

The tail of a comet as well as the comma are visible thanks to the influence of sunlight on these objects.

If there is a case that these objects cross the inner Solar System,<u> then they will be visible from Earth</u>. The reason why this occurs is that as the comet approaches the internal solar system, the materials that are inside the comet vaporize and flow out of the nucleus thanks to solar radiation, and while they do carry dust with them.

This dust is the one that reflects sunlight directly, while the <u>gases shine because of ionization. </u>

Usually we will need a telescope to see a comet, although there are some that can be seen with the naked eye.

5 0

3 years ago

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