Physics, 28.05.2020 06:58 mathlady12

5. Find the quantity of heat required to melt completely 200g of lead initially at 27C given that, for lead: melting point = 327 C, mean specific heat capacity = 0.14 j/kg , specific latent heat of fusion = 270j/kg.

If the heat is supplied to the lead at rate of 30 joules per second find:
a) the time taken to bring the lead to its melting point
b) the additional time required to melt it.

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