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liberstina [14]
4 years ago
5

What role does density play in the movement of convection curruents?

Physics
1 answer:
shtirl [24]4 years ago
7 0

Convection occurs through heat transfer due to a difference in density in the fluids.

Consider a pot of water being heated. The water in the pot gets heated rises ,it provides energy for the particles in the water to move and thus the water expands which results in the density of the water becoming less. These particles rise up till the top of the pot owing to the property of very less density of the particles.


Then after some time, it cools down which results in increase of the density of the particles. The heavier denser particles sink to the bottom and is once again heated and rises and this process continues unless all the water particles in the pot are heated and warmed.This transfer of energy by the movement of particles cause convection.


During the day the heat surface above the earth exposed to the sun's rays is heated. This rise in temperature,decreases the density of the air and the warm air rises.

This air cools down and becomes denser. This dense cool air sink back and forces the warm air to rise again.

This transfer of movement of particles causes convection. This cycle is the cause of winds and thus energy is transferred through the atmosphere.


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A heavy piece of hanging sculpture is suspended by a90-cm-long, 5.0 g steel wire. When the wind
Yuliya22 [10]

As we know that fundamental frequency is given as

f = \frac{1}{2L}\sqrt{\frac{T}{\mu}}

here we know that

\mu = \frac{m}{l}

here we have

m = mass of wire = 5 g

l = length of wire = 90 cm

\mu = \frac{0.005}{0.90} kg/m

\mu = 5.56 \times 10^{-3} kg/m

from above formula now

80 = \frac{1}{2(0.90)}\sqrt{\frac{T}{5.56\times 10^{-3}}}

144 = \sqrt{180 T}

T = 115.2 N

now we know that tension is due to weight of the sculpture so we will have

Mg = 115.2 N

M = 11.76 kg

so its mass will be 11.76 kg

6 0
4 years ago
1.
MAXImum [283]

Answer:

true

Explanation:

Newton is the measure of the force with turns to be gravity multiplying the mass. Thus, the forces acts on the particles in the direction of the movement of the particles

7 0
3 years ago
NEED HELP ASAP<br> thanks + BRAINLIST only for correct answer
Fantom [35]

Answer:

I. They come from sources across space

II. They travel in a straight line from their source.

III. They can be reflected by some types of material.

Explanation:

Light wave can be defined as an electromagnetic wave that do not require a medium of propagation for it to travel through a vacuum of space where no particles exist.

The following statements about light waves are true;

I. They come from sources across space.

II. They travel in a straight line from their source.

III. They can be reflected by some types of material. reflection occurs when a ray of light or wavefronts bounces off a smooth surface. Thus, when light hit a surface, it bounces back to the medium from which it was originally propagated with.

However, light waves cannot travel through all type of material except materials that are transparent or translucent but not opaque.

4 0
3 years ago
Help with Number 4 plz &lt;3
vitfil [10]
Nevermind that one i dont know sorry 

8 0
4 years ago
What would happen if a group of force of 45 N compete against a group of 50 N
larisa [96]
The 50N group of force would be greater
So whichever object is being pulled will be pulled towards the 50N force
7 0
3 years ago
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