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nikitadnepr [17]

3 years ago

7

In light wave, what is light?

1 answer:

krok68 [10]3 years ago

6 0

Answer:

the term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not. In this sense, gamma rays, X-rays, microwaves and radio waves are also light. ... The absorbed energy of the EM waves is called a photon, and represents the quanta of light.

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Why is copper NOT used as a filament?

chubhunter [2.5K]

Answer:

Short answer, because copper wire does not have high resistance.

Explanation:

6 0

3 years ago

The acceleration of gravity is -9.8 m/s2. A sling shot fires a rock straight up into the air with a speed of +39.2 m/s. 1. what

Vanyuwa [196]

Given that,

The acceleration of gravity is -9.8 m/s²

Initial velocity, u = 39.2 m/s

Time, t = 2 s

To find,

The final velocity of the shot.

Solution,

Let v is the final velocity of sling shot. Using first equation of motion to find it.

v = u +at

Here, a = -g

v = u-gt

v = (39.2)-(9.8)(2)

v = 19.6 m/s

So, its velocity after 2 seconds is 19.6 m/s.

4 0

3 years ago

Sound and light energy travel from one place to another as waves. When this happens we say that the energy is:

Amiraneli [1.4K]

Answer:

B

Explanation:

transferred

4 0

4 years ago

you weight 650 N. What would you wieght if the Earth were four times as massive as it is and its raduis were three times its pre

LiRa [457]

To solve this problem we will apply the concept given by the law of gravitational attraction, which properly defines gravity under the function

$g = \frac{GM}{r^2}$

Here,

G = Gravitational Universal Constant

M = Mass of Earth

r = Distance between the human and the center of mass of the Earth

The acceleration due to gravity when is 4 times the mass of Earth and 3 times the radius would be given as,

$g_1 = \frac{GM}{r^2}$

$g_2 = \frac{G(4M)}{(3r)^2}$

$g_2 = \frac{4GM}{9r^2}$

$g_2 = \frac{4}{9} g_1$

The weight is defined as

$W = mg_1$

So the new weight would be given as

$W' = mg_2$

$W' = m(\frac{4}{9} g_1 )$

$W' = \frac{4}{9} mg_1$

$W' = \frac{4}{9} W$

$W' = \frac{4}{9}(650)$

$W' = 288.8N$

Therefore the weight under this condition is 288.8N

5 0

3 years ago

A sign is hung between two cables. If the sign weighs 350 N, what is the tension (in N) in each cable?

Gre4nikov [31]

Answer:

Tension in each cable = 175 N

Explanation:

Given:

Number of cables = 2

Weight of sign board(T) = 350 N

Find:

Tension in each cable

Computation:

We know that,

T1 = T2

So,

T1 + T2 = T

T1 + T2 = 350

T1 + T1 = 350

T1 = 175

Tension in each cable = 175 N

3 0

4 years ago