17. A 1 kg cube of lead is heated from 12.5 °C to 65.4 °C. How much energy is required to heat the lead ? (assume: specific heat for lead is 0.129 J/ gºC) 18. A block of mass 12 kg is pushed along a smooth frictionless surface with a two constant forces, F₁ = 100 N at the angle of 10° above the horizontal, and the F₂ = 50 N at the angle of 200 above the horizontal. The block is displaced 2.6 m. Calculate the total work done by block.

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17. A 1 kg cube of lead is heated from 12.5 °C to 65.4 °C. How much energy
is required to heat the lead ? (assume: specific heat for lead is 0.129 J/
gºC)
SINDI
18. A block of mass 12 kg is pushed along a smooth frictionless surface with
a two constant forces, F₁ = 100 N at the angle of 100 above the horizontal,
and the F₂ = 50 N at the angle of 200 above the horizontal. The block is
displaced 2.6 m. Calculate the total work done by block.
Transcribed Image Text:17. A 1 kg cube of lead is heated from 12.5 °C to 65.4 °C. How much energy is required to heat the lead ? (assume: specific heat for lead is 0.129 J/ gºC) SINDI 18. A block of mass 12 kg is pushed along a smooth frictionless surface with a two constant forces, F₁ = 100 N at the angle of 100 above the horizontal, and the F₂ = 50 N at the angle of 200 above the horizontal. The block is displaced 2.6 m. Calculate the total work done by block.
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