Properties Of Solids And Liquids Question 429

Question: A hammer of mass 1 kg having speed of 50 m/s, hit a iron nail of mass 200 gm. If specific heat of iron is 0.105cal/gmC and half the energy is converted into heat. the raise in temperature of nail is

Options:

A) 7.1C

B) 9.2C

C) 10.5C

D) 12.1C

Show Answer

Answer:

Correct Answer: A

Solution:

[a] W=JQ12(12Mv2)=J(m.c.Δθ)

14×1×(50)2=4.2[200×0.105×Δθ]

Δθ=7.1C



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