Question

Please answer questions 4 to 7 with all choices in the questions ❤️❤️❤️

Answer 1

Question 04.

Near room temperature, the heat capacity of most solids is around 3k per atom (the molar heat capacity for a solid consisting of n-atom molecules is ~3nR). This is the well-known Dulong and Petit law. 2. At low temperatures, Cv decreases, becoming zero at T=0.

Question 05.

Given : x=Acosωt

Potential energy,

$u = \frac{1}{2} m {w}^{2} {x}^{2} \\ = \frac{1}{2} m {w}^{2} {a}^{2} wt$

On plotting a graph between potential energy U and time t, we shall get a curve II and graph between U and x we shall get curve IV.

Question 06. in attachment

Question 07.

$Area=l×b \\ A△A=l△l+b△b \\ =(25.20.1+16.80.1) \\ =0.00992≈0.01$

This is the relative error.

Percentage  error =0.01×100=1%

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