Embibe Experts Solutions for Exercise 4: Assignment

$2\mathrm{gm}$ of steam condenses when passed through $40\mathrm{gm}$ of water initially at $25°\mathrm{C}$. The condensation of steam raises the temperature of water to $54.3°\mathrm{C}$. What is the latent heat of steam?

The temperature of $100\mathrm{gm}$ of water is to be raised from $24°\mathrm{C}$ to $90°\mathrm{C}$ by adding steam to it. The mass of the steam required for this purpose is

Water falls from a height $500 \mathrm{m}$. What is the rise in temperature of water at the bottom if the whole energy remains in the water? (Given, the specific heat capacity of water, $c=1 \mathrm{cal}({\mathrm{g}}^0\mathrm{C}{)}^{-1}$)

The temperature gradient in a rod of $0.5 \mathrm{m}$ long is $80°\mathrm{C} {\mathrm{m}}^{-1}$. If the temperature of hotter end of the rod is $30°\mathrm{C}$, then the temperature of the colder end is

Three identical thermal conductors are connected as shown in figure. Consider no heat lost due to radiation, the temperature of the junction is

A liquid cools down from $70°\mathrm{C}$ to $60°\mathrm{C}$ in $5$ minutes. The time taken to cool it from $60°\mathrm{C}$ to $50°\mathrm{C}$ will be

If a metallic sphere gets cooled from $62°\mathrm{C}$ to $50°\mathrm{C}$ in $10$ minutes and in the next $10$ minutes gets cooled to $42°\mathrm{C}$, then the temperature of the surroundings is

A body, which emits radiations of all possible wavelengths, is known as