Four rods made up of glass, plastic, aluminium, an wood are covered with wax at one end. The other ends of these rods are inserted in a container containing hot water The wax on which rod will melt first?
In the given figure, a rod is free at one end and other end is fixed. When we change the temperature of rod by Deltatheta , then strain produced in the rod will be
One end of a metal rod is dipped in boiling water and the other is dipped in melting ice.
Two children are at opposite ends of an aluminium rod. One strikes the end of the rod with a stone. Find the ratio of times taken by the sound wave in air and in aluminium to reach the second child.
A cylindrical rod with one end in a steam chamber and the other end in ice results in melting of 0.1 g of ice per second. If the rod is replaced by another rod with half the length and double the radius of the first and if the thermal conductivity of material of the second rod is 0.25 times that of first, the rate at which ice melts in gs^(-1) will be:
The container A contains ice at O^(@)C . A conducting uniform rod PQ of length 4R is used to transfer heat to the ice in the container. The end P of the rod is maintained at 100^(@)C and the other end Q is kept inside container A. The complete ice melts in 23 minutes. In another experiment, two conductors in shape of quarter circle of radii 2R and R are welded to the conductor PQ at M and N respectively and their other ends are inserted inside the container A. All conductors are made of same material and have same cross sectional area. Once again the end P is maintained at 100^(@)C and this time the com- plete ice melts in t min- ute. Find t. Assume no heat loss from the curved surface of the rods. [Take pi~=3.0 ]
Four rods made of iron, wood, paper, and plastic are connected by a straight metallic rod, as shown in the given figure. The rods are heated by a hot filament placed near them. After sometime, it is observed that the temperature of the iron rod is more than that of the other three rods. Heat transfer whitin the rods takes place by
