A lead bullet of mass 21 g travelling at a speed of 100m//s comes to rest in a wooden block . If no heat is taken away by the wood , the rise in temperature of the bullet in the wood nearly is (specified heat of lead =30 cal//kg^(@)C )

A lead bullet of mass 21 g travelling at a speed of 100m//s comes to r

1.	A lead bullet of mass 21 g travelling at a speed of 100m//s comes to rest in a wooden block . If no heat is taken away by the wood , the rise in temperature of the bullet in the wood nearly is (specified heat of lead =30 cal//kg^(@)C )
Answer» <html><body><p></p>Solution :Kinetic energy of the <a href="https://interviewquestions.tuteehub.com/tag/bullet-403823" style="font-weight:bold;" target="_blank" title="Click to know more about BULLET">BULLET</a>=heat gained by the bullet `1/<a href="https://interviewquestions.tuteehub.com/tag/2-283658" style="font-weight:bold;" target="_blank" title="Click to know more about 2">2</a> mv^(2) = msDeltat` <br/> `Delta t =(v^(2))/(<a href="https://interviewquestions.tuteehub.com/tag/2s-301125" style="font-weight:bold;" target="_blank" title="Click to know more about 2S">2S</a>) = ((100^(2)))/(2xx0.03xx4.2xx1000) = 39.68^(@)C`</body></html>