Solution:
Standard fixed points are:
"t_0=0^{\\circ} \u0421"
"t_1=100^{\\circ} \u0421"
Let's write the linear expansion equation for temperature t1:
"l_1-l_0=\\alpha{l_0}(t_1-t_0)"
From previous equation we can find the coefficient of thermal expansion of mercury:
"\\alpha=\\frac{l_1-l_0}{l_0(t_1-t_0)}=\\frac{20.86-1.06}{1.06\\cdot{100}}=0.1868" K-1
Let's write the linear expansion equation for temperature t2:
"l_2-l_0=\\alpha{l_0(t_2-t_0)}"
"t_2-t_0=\\frac{l_2-l_0}{\\alpha{l_0}}=\\frac{7.0-1.06}{0.1868\\cdot{1.06}}=30^{\\circ} \u0421"
"t_2=30^{\\circ} \u0421"
Answer:
The temperature of the body is 30o C.
Comments
Leave a comment