(a) Find the final temperature of a copper rod. Whose area of cross section changes from `10m^(2)` to `11m^(2)` due to heating. The copper rod is initially kept at 90K. (Coefficient of superficial expansion is 0.0021/K).
(b) The far position of a myopic person is 90 cm is front of the eye. what is the nature and power of the lens required to correct the problem?

Find the final temperature of a cooper rod. Whose area of cross section changes from 10 m^(2) to 11m^(2) due to heating. The copper rod is initially kept at 90K. (Coefficient of superficial expansion is 0.0021/K)

The far position of a myopic person is 90 cm in front off the eye. What is the nature and power of the lens requried to correct the problem?

The left end of a copper rod (length= 20cm , Area of cross section= 0.2cm^(2) ) is maintained at 20^(@)C and the right end is maintained at 80^(@)C . Neglecting any loss of heat through radiation, find (a) the temperature at a point 11cm from the left end and (b) the heat current through the rod. thermal conductivity of copper =385Wm^(-1)C^(-1) .

2.00 mole of a monatomic ideal gas (U=1.5nRT) is enclosed in an adiabatic, fixed , vertical cylinder fitted with a smooth, light adiabatic piston. The piston is connected to a vertical spring of spring constant 200 N m^(-1) as shown in .the area of cross section of the cylinder is 20.0 cm^(2) . initially, the spring is at its natural length and the temperature of the gas is 300K at its natural length. the atmosphere pressure is 100 kPa. the gas is heated slowly for some time by means of an electric heater so as to move the position up through 10 cm. find (a) the work done by the gas (b) the final temperature of the gas and (c ) the heat supplied by the heater.

Water leaks out from an open tank through a hole of area 2mm^2 in the bottom. Suppose water is filled up to a height of 80 cm and the area of cross section of the tankis 0.4 m^2 . The pressure at the open surface and the hole are equal to the atmospheric pressure. Neglect the small velocity of the water near the open surface in the tank. a. Find the initial speed of water coming out of the hole. b. Findteh speed of water coming out when half of water has leaked out. c. Find the volume of water leaked out during a time interval dt after the height remained is h. Thus find the decrease in height dh in term of h and dt. d. From the result of part c. find the time required for half of the water to leak out.

A heat flux of 4000 J/s is to be passed through a copper rod of length 10 cm and area of cross-section 100 cm^2 . The thermal conductivity of copper is 400 W/m/ °C. The two ends of this rod must be kept at a temperature difference of

One end of a metal rod of length 1.0 m and area of cross section 100cm^2 is maintained at 100° C. If the other end of the rod is maintained at 0°C, the quantity of heat transmitted through the rod per minute is (Coefficient of thermal conductivity of material of rod =100 W/m-K)