Science, asked by Shanaya7317, 9 months ago

What is Covection??​

Answers

Answered by Cynefin
2

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✳ What is Convection....?

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✏When a fluid, such as air or a liquid, is heated and then travels away from the source, it carries the thermal energy along. This type of heat transfer is called convection. The fluid above a hot surface expands, becomes less dense, and rises.

✏The less dense or the heated fluid near source, rises upward and the colder fluid takes it place. This process continues till all the fluid gets heated.

✏ This occurs only in liquids and gases because they have interparticular space , and the molecules or atoms can easily move which is not possible for Solids.

Example- A space heater is a classic convection example. As the space heater heats the air surrounding it near the floor, the air will increase in temperature, expand, and rise to the top of the room. This forces down the cooler air so that it becomes heated, thus creating a convection current.

Attachments:
Answered by krishna02299
4

Answer:

Animation IssSe Hoga

Explanation:

TEX And tx Ki Jagha tex likhke hoga Animation

[TEX]<!DOCTYPE html>

<html lang="en">

<head>

<title>Shinchan</title>

</head>

<body>

<div class="face">

<div class="forhead"></div>

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<div class="ear"></div>

<div class="eyebrow left"></div>

<div class="eyebrow right"></div>

<div class="eye left"></div>

<div class="eye right"></div>

<div class="mouth"></div>

<div class="shy"></div>

<div class="shy right"></div>

</div>

<style>

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.face {height: 600px; width: 350px; position: relative; margin: auto;}

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.forhead:after {width: 160px; height: 150px; border-radius: 150% 174% 159% 100%; transform: rotate(-20deg); top: 13px; left: 59px; border-top: 15px solid #fbc6a3;}

.forhead:before{ background:#fbc6a3; width:60px; height:10px; content:''; position:absolutet; z-index:7; left:105px; top:9px; transform: rotate(13deg); border-radius:100%}

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.cheeks {background: #fbc6a3; width: 280px; height: 100px; border-radius: 50px 0px 50px 40px; transform: rotate(-3deg); position: relative; content: 'a'; top: 108px; left:10px}

.cheeks:after {width: 297px; height: 100px; background: #fbc6a3; content: ''; transform: rotate(-3deg); position: absolute; border-radius: 100% 100% 100% 100%; left: 1px; bottom: -14px;}

.eye {width:40px; height:40px; position:relative; background:black; border-radius:100%; animation: close-eye 4s none .2s infinite;}

.eye:after {content:''; position:absolute; background:white; width:15px; height:15px; border-radius:100%; left:17px; top:12px;}

.eye:before {content:''; position:absolute; width:70px; height:60px; border-radius:100%; border-top:2px solid black; left:-20px; margin-top:-20px;}

.eye.left,.eye.right {position:absolute; top:80px; left:100px; z-index:10;}

.eye.right {left:190px; top:90px;}

.eyebrow {animation: eyebroani 2s linear .2s infinite;}

.eyebrow,.eyebrow:after{position:absolute; width:20px; height:60px; background:black; z-index:8; border-radius:15px; transform: rotate(40deg); top:10px; left:90px;}

.eyebrow:after {content:''; transform: rotate(-100deg); left:19px; margin-top:-23px; top:auto;}

.eyebrow.right {left:180px; top:8px; transform: rotate(50deg);}

.mouth {position:absolute; width:40px; height:40px; background:#76322f; border-radius:100%; top:180px; left:50px; z-index:8;}

.shy {position:absolute; width:0px; height:0px; border-radius:100%; opacity:0; box-shadow: 0px 0px 40px 20px red; z-index:8; left:35px; top:160px; animation: shy 10s linear .2s infinite;}

.shy.right {left:170px; top:180px;}

@keyframes eyebroani {0% {margin-top:auto} 10% {margin-top:-10px} 20% {margin-top:auto} 30% {margin-top:-10px} 40% {margin-top:auto} 100% {margin-top:auto}}

@keyframes shy {0% {opacity:0} 10% {opacity:0.2} 90% {opacity:0.2} 100% {opacity:0}}

@keyframes close-eye {0% {height: 40px; margin-top: auto; overflow: auto;}

5% {height: 2px; margin-top: 20px; overflow: hidden;}

5.1% {height: 40px; margin-top:0; overflow:visible;}}

</style>

</body>

</html>[/tx]

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