Science, asked by udaypal034, 9 months ago

why are tha ceiling of concert hall curved​

Answers

Answered by Anonymous
23

Answer:

 &lt;svg id="wrap" width="300" height="300"&gt;</p><p>  </p><p>  &lt;!-- background --&gt;</p><p>  &lt;svg&gt;</p><p>    &lt;circle cx="150" cy="150" r="130" style="stroke: lightblue; stroke-width:18; fill:transparent"/&gt;</p><p>    &lt;circle cx="150" cy="150" r="115" style="fill:#2c3e50"/&gt;</p><p>    &lt;path style="stroke: #2c3e50; stroke-dasharray:820; stroke-dashoffset:820; stroke-width:18; fill:transparent" d="M150,150 m0,-130 a 130,130 0 0,1 0,260 a 130,130 0 0,1 0,-260"&gt;</p><p>      &lt;animate attributeName="stroke-dashoffset" dur="6s" to="-820" repeatCount="indefinite"/&gt;</p><p>    &lt;/path&gt;</p><p>  &lt;/svg&gt;</p><p>  </p><p>  &lt;!-- image --&gt;</p><p>  &lt;svg&gt;</p><p>    &lt;path id="hourglass" d="M150,150 C60,85 240,85 150,150 C60,215 240,215 150,150 Z" style="stroke: white; stroke-width:5; fill:white;" /&gt;</p><p>    </p><p>    &lt;path id="frame" d="M100,97 L200, 97 M100,203 L200,203 M110,97 L110,142 M110,158 L110,200 M190,97 L190,142 M190,158 L190,200 M110,150 L110,150 M190,150 L190,150" style="stroke:lightblue; stroke-width:6; stroke-linecap:round" /&gt;</p><p>    </p><p>    &lt;animateTransform xlink:href="#frame" attributeName="transform" type="rotate" begin="0s" dur="3s" values="0 150 150; 0 150 150; 180 150 150" keyTimes="0; 0.8; 1" repeatCount="indefinite" /&gt;</p><p>    &lt;animateTransform xlink:href="#hourglass" attributeName="transform" type="rotate" begin="0s" dur="3s" values="0 150 150; 0 150 150; 180 150 150" keyTimes="0; 0.8; 1" repeatCount="indefinite" /&gt;</p><p>  &lt;/svg&gt;</p><p>  </p><p>  &lt;!-- sand --&gt;</p><p>  &lt;svg&gt;</p><p>    &lt;!-- upper part --&gt;</p><p>    &lt;polygon id="upper" points="120,125 180,125 150,147" style="fill:#2c3e50;"&gt;</p><p>      &lt;animate attributeName="points" dur="3s" keyTimes="0; 0.8; 1" values="120,125 180,125 150,147; 150,150 150,150 150,150; 150,150 150,150 150,150" repeatCount="indefinite"/&gt;</p><p>    &lt;/polygon&gt;</p><p>    </p><p>    &lt;!-- falling sand --&gt;</p><p>    &lt;path id="line" stroke-linecap="round" stroke-dasharray="1,4" stroke-dashoffset="200.00" stroke="#2c3e50" stroke-width="2" d="M150,150 L150,198"&gt;</p><p>      &lt;!-- running sand --&gt;</p><p>      &lt;animate attributeName="stroke-dashoffset" dur="3s" to="1.00" repeatCount="indefinite"/&gt;</p><p>      &lt;!-- emptied upper --&gt;</p><p>      &lt;animate attributeName="d" dur="3s" to="M150,195 L150,195" values="M150,150 L150,198; M150,150 L150,198; M150,198 L150,198; M150,195 L150,195" keyTimes="0; 0.65; 0.9; 1" repeatCount="indefinite"/&gt;</p><p>      &lt;!-- last drop --&gt;</p><p>      &lt;animate attributeName="stroke" dur="3s" keyTimes="0; 0.65; 0.8; 1" values="#2c3e50;#2c3e50;transparent;transparent" to="transparent" repeatCount="indefinite"/&gt;</p><p>    &lt;/path&gt;</p><p>    </p><p>    &lt;!-- lower part --&gt;</p><p>    &lt;g id="lower"&gt;</p><p>      &lt;path d="M150,180 L180,190 A28,10 0 1,1 120,190 L150,180 Z" style="stroke: transparent; stroke-width:5; fill:#2c3e50;"&gt;</p><p>        &lt;animateTransform attributeName="transform" type="translate" keyTimes="0; 0.65; 1" values="0 15; 0 0; 0 0" dur="3s" repeatCount="indefinite" /&gt;</p><p>      &lt;/path&gt;</p><p>      &lt;animateTransform xlink:href="#lower" attributeName="transform"</p><p>                    type="rotate"</p><p>                    begin="0s" dur="3s"</p><p>                    values="0 150 150; 0 150 150; 180 150 150"</p><p>                    keyTimes="0; 0.8; 1"</p><p>                    repeatCount="indefinite"/&gt;</p><p>    &lt;/g&gt;</p><p>    </p><p>    &lt;!-- lower overlay - hourglass --&gt;</p><p>    &lt;path d="M150,150 C60,85 240,85 150,150 C60,215 240,215 150,150 Z" style="stroke: white; stroke-width:5; fill:transparent;"&gt;</p><p>      &lt;animateTransform attributeName="transform"</p><p>                    type="rotate"</p><p>                    begin="0s" dur="3s"</p><p>                    values="0 150 150; 0 150 150; 180 150 150"</p><p>                    keyTimes="0; 0.8; 1"</p><p>                    repeatCount="indefinite"/&gt;</p><p>    &lt;/path&gt;</p><p>    </p><p>    &lt;!-- lower overlay - frame --&gt;</p><p>    &lt;path id="frame" d="M100,97 L200, 97 M100,203 L200,203" style="stroke:lightblue; stroke-width:6; stroke-linecap:round"&gt;</p><p>      &lt;animateTransform attributeName="transform"</p><p>                    type="rotate"</p><p>                    begin="0s" dur="3s"</p><p>                    values="0 150 150; 0 150 150; 180 150 150"</p><p>                    keyTimes="0; 0.8; 1"</p><p>                    repeatCount="indefinite"/&gt;</p><p>    &lt;/path&gt;</p><p>  &lt;/svg&gt;</p><p>  </p><p>&lt;/svg&gt;

Answered by Anonymous
1

\huge{\boxed{\orange{♡}{\rm{Answer}}\purple{♡}}}

The ceiling of concert halls are curvedbecause people seated at the back rows of the hall may not hear the sound from the speaker clearly. When the ceiling is curved or concave, it helps in reflecting sound waves making it travel to farther distances.

Similar questions