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Lead pollution in Indian cities had been...

Lead pollution in Indian cities had been mainly due to

A

electronic gadgets

B

automoblies

C

batteries

D

lead pencils

Text Solution

Verified by Experts

The correct Answer is:
B
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Two lead bullets of equal mass top after head-on Collison and reach their melting point due to the heat generated. The temperature of the bullets before collision was 35^(@)C . Find the relative velocity of the bullets before collision. Specific heat of lead = 0.03 cal cdot g^(-1) cdot^(@)C^(-1) , melting point of lead = 335^(@)C, J = 4.18 xx 10^(7) erg cdot cal^(-1) .