1) 3 aluminium rods of equal length form an equilateral triangle ABC.
Taking O(midpoint of BC) as the origin .Find increase in Y-cordinate of center of mass per unit change in temperature of system. Assume length of each rod is 2m =4^{[2 ]} 3 * 10^-6 [ans:4 * 10^-6 ]

2)shell of space station is a blackened sphere in which the temperature T=500K
is maintained due to operation of appliances of the staion. Find the temperature of the shell if the station is enveloped by a thin spherical black screen of nearly the same radius.[ans:500*^{[4 ]} 2=600K]

Radhika Batra , 11 Years ago

Grade 11