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3 years ago

How is light described?

1 answer:

5 0

Light as a wave: Light can be described (modeled) as an electromagnetic wave. ... This changing magnetic field then creates a changing electric field and BOOM - you have light. Unlike many other waves (sound, water waves, waves in a football stadium), light does not need a medium to “wave” in.

Explanation:

You might be interested in

What does it mean when work is positive?

Degger [83]

Answer:

To have a positive job, the two vectors must have the same direction

Explanation:

Work is a scalar defined as the scalar product of two vectors, the froce and the displacement. To have a positive job, the two vectors must have

collinear and that their arrows point in the same direction.

You can also appreciate this from the work equation

W = F. r

bold indicate vector

W = F r cos θ

With θ the angle between force and displacement

7 0

3 years ago

Matter is anything that

cluponka [151]

Takes place in the space and it can be fluid or solid

6 0

4 years ago

4720 kj of energy are supplied to a material in order to raise its temperature by 65k. if the specific heat capacity of the mate

jeka57 [31]

The mass of material is 26.6 Kg

Given:

Q = 4720 KJ

Change in Temperature (AT) = 65 K

Specific heat capacity of material (c) = 2730 J K Kg*K

The relation between Q, AT, c and m are related by following formula: Q=m* c*∆T,

Plugging value in heat formula:

4720KJ = m* 2730 J/Kg*K * 65K

4720KJ = m * 177450J/kg

Converting 177450 J/kg to Kg/KJ

177450 J/kg*1KJ/1000J = 177.450KJ/kg

Dividing both side by 177.450KJ/kg

4720KJ/177.450KJ/Kg = m*177.450KJ/Kg÷ 177.450KJ/Kg

Hence, the mass of material = 26.6 Kg

Learn more about Mass here:

brainly.com/question/19385703

#SPJ4

6 0

2 years ago

Wha is the frequency of a wave having a period equal to 18 seconds?

Rainbow [258]

Answer:

5.5 × 10-2 hertz

Explanation:

The time taken by a wave crest to travel a distance equal to the length of wave is known as wave period.

= 0.055 per second (1 cycle per second = 1 Hertz)

Thus, we can conclude that the frequency of the wave is 5.5 X 10^{-2} hertz.

Hopes this helps, love <3

5 0

3 years ago

A uniform solid ball with a mass , M, is placed at the top of an inclined plane and released. What will be the velocity of the b

eimsori [14]

Answer: $v=\sqrt{\frac{10}{7}\cdot gH}$

Explanation:

Given

Mass of ball is M

Height of incline is H

Here conservation of energy will provide the velocity at bottom

Energy at top of incline plane $=MgH$

Energy at bottom=Kinetic energy+Rotational energy

Assuming Pure rolling we can write

$v=\omega R$

where $v$ =velocity of ball

$\omega$ =angular velocity of ball

R=radius of ball

$E_b=\frac{1}{2}Mv^2+\frac{1}{2}I\omega ^2$

where I=moment of inertia of ball

$I=\frac{2}{5}MR^2$

$E_b=\frac{1}{2}Mv^2+\frac{1}{2}\times \frac{2}{5}MR^2\times (\frac{V}{R})^2$

$E_b=\frac{7}{10}Mv^2$

Now ,

$MgH=\frac{7}{10}Mv^2$

$v=\sqrt{\frac{10}{7}\cdot gH}$

8 0

3 years ago