Questions
A piece of lead is dropped from a height of 210 m. If 50 % of its striking energy is converted into heat calculate the rise in temperature (Specific heat of lead = 0.03 KCal / kg, J = 4200J/KCal and g = 10 m/s2)
detailed solution
Correct option is C
(m×10×210)×50100=m×0.03×4200×Δθ⇒Δθ=253∘CTalk to our academic expert!
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An ice block of mass 8 kg is dragged along a rough horizontal surface (=0.4) uniformly through 42 m. If all the heat produced is completely absorbed by block then mass of ice that melts is ( L= 80 cal/gm, g = 10m/s2)
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