Advertisements
Advertisements
Question
What is meant by global warming?
Advertisements
Solution
Global warming means the increase in the average effective temperature of Earth’s surface due to an increase in the amount of greenhouse gases in its atmosphere.
APPEARS IN
RELATED QUESTIONS
Heat supplied to a solid change it into liquid. What is this change in the phase called?
The temperature of 170 g of water at 50°C is lowered to 5°C by adding a certain amount of ice to it. Find the mass of ice added.
Given: Specific heat capacity of water = 4200 J kg-1 °C-1 and specific latent heat of ice = 336000 J kg-1.
Write the expression for the heat energy Q received by the substance when m kg of substance of specific heat capacity c Jkg-1 k-1 is heated through Δt° C.
Discuss the role of high specific heat capacity of water with reference to climate in coastal areas.
In an experiment to determine the specific heat capacity of a solid following operations were
made:
Mass of calorimeter + stirrer = x kg
Mass of water = y kg
Initial temperature of water t1℃
Mass of solid = z kg
Temperature of solid = t2 ℃
Temperature of mixture = t ℃
Specific heat capacity of calorimeter and water are c1 and c2 respectively. Express the specific
heat capacity c of the solid in terms of the above data.
A liquid X has specific heat capacity higher than the liquid Y. Which liquid is useful as coolant in car radiators.
A monoatomic gas of pressure 'P' having volume 'V' expands isothermally to a volume '2V' and then adiabatically to a volume '16V'. The final pressure of the gas is ______.
(ratio of specific heats = `5/3`)
A metal ball of heat capacity 50J/°C loses 2000 J of heat. By how much will its temperature fall?
When two kilocalories of heat are supplied to a system, the internal energy of the system increases by 5030 J and the work done by the gas against the external pressure is 3350 J. Calculate J, the mechanical equivalent of heat.
