Question

Some people are the members of laughter club give scientific reason
​

Answer 1

Answer:

I don't know. ............................

Answer 2

Answer:

$<div class="scene"></p><p> <div class="cube"></p><p> <div class="cube__face cube__face--front">front</div></p><p> <div class="cube__face cube__face--back">back</div></p><p> <div class="cube__face cube__face--right">right</div></p><p> <div class="cube__face cube__face--left">left</div></p><p> <div class="cube__face cube__face--top">top</div></p><p> <div class="cube__face cube__face--bottom">bottom</div></p><p> </div></p><p></div></p><p>.scene {</p><p> width: 200px;</p><p> height: 200px;</p><p> perspective: 600px;</p><p>}</p><p></p><p>.cube {</p><p> width: 100%;</p><p> height: 100%;</p><p> position: relative;</p><p> transform-style: preserve-3d;</p><p>}</p><p></p><p>.cube__face {</p><p> position: absolute;</p><p> width: 200px;</p><p> height: 200px;</p><p>}</p><p>.cube__face--front { transform: rotateY( 0deg); }</p><p>.cube__face--right { transform: rotateY( 90deg); }</p><p>.cube__face--back { transform: rotateY(180deg); }</p><p>.cube__face--left { transform: rotateY(-90deg); }</p><p>.cube__face--top { transform: rotateX( 90deg); }</p><p>.cube__face--bottom { transform: rotateX(-90deg); }</p><p>.cube__face--front { transform: rotateY( 0deg) translateZ(100px); }</p><p>.cube__face--right { transform: rotateY( 90deg) translateZ(100px); }</p><p>.cube__face--back { transform: rotateY(180deg) translateZ(100px); }</p><p>.cube__face--left { transform: rotateY(-90deg) translateZ(100px); }</p><p>.cube__face--top { transform: rotateX( 90deg) translateZ(100px); }</p><p>.cube__face--bottom { transform: rotateX(-90deg) translateZ(100px); }</p><p>.cube { transform: translateZ(-100px); }</p><p>.cube.show-front { transform: translateZ(-100px) rotateY( 0deg); }</p><p>.cube.show-right { transform: translateZ(-100px) rotateY( -90deg); }</p><p>.cube.show-back { transform: translateZ(-100px) rotateY(-180deg); }</p><p>.cube.show-left { transform: translateZ(-100px) rotateY( 90deg); }</p><p>.cube.show-top { transform: translateZ(-100px) rotateX( -90deg); }</p><p>.cube.show-bottom { transform: translateZ(-100px) rotateX( 90deg); }</p><p>.cube { transition: transform 1s; }</p><p>$