You will feel the screen protector crack
<em>r = 15 cm</em>
<em>formula</em>
<em>V = πr²×h/3</em>
<em>replace</em>
<em>4950 = 22/7×r²×21/3</em>
<em>4950 = 22/7×r²×7</em>
<em>4950 = 22×r²</em>
<em>r² = 4950/22</em>
<em>r² = 225</em>
<em>r = √225</em>
<em>r = √15²</em>
<em>r = 15 cm</em>
Answer:
NFC(Near Field Communication).
Explanation:
When user wants to share pictures quickly between the mobile devices which are in very close proximity we can use NFC(Near Field Communication).
Near Field Communication(NFC):-It is a group of communication protocols that lets two devices most of the times these are mobile phones to establish connection and the distance between them should be less around 4 centi meter.
