English

Explain, Why is Water Sprayed on Roads in Evening in Hot Summer? - Physics

Advertisements
Advertisements

Question

Explain, why is water sprayed on roads in evening in hot summer?

Short/Brief Note
Advertisements

Solution

Water has the highest specific heat capacity of 4.2 Jg-1 °C-1. Thus, water absorbs large amount of heat from the roads, but its own temperature does not rise much. Thus, on the whole the roads get cooled.

shaalaa.com
  Is there an error in this question or solution?
Chapter 10: Specific Heat Capacity and Latent Heat - Short Answers

APPEARS IN

ICSE Physics [English] Class 10
Chapter 10 Specific Heat Capacity and Latent Heat
Short Answers | Q 16

RELATED QUESTIONS

A solid of mass 50 g at 150 °C is placed in 100 g of water at 11 °C when the final temperature recorded is 20 °C. Find the specific heat capacity of the solid. (specific heat capacity of water = 4.2 J/g °C)


Water in lakes and ponds do not freeze at once in cold countries. Give a reason is support of your answer.


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.


The global warming has resulted:
(a) the increase in yield of crops
(b) the decrease in sea levels
(c) the decrease in human deaths
(d) the increase in sea levels


Study the following procedure and answer the questions below:
1. Take 3 spheres of iron, copper and lead of equal mass.
2. Put all the 3 spheres in boiling water in a beaker for some time.
3. Take 3 spheres out of the water. Put them immediately on a thick slab of wax.
4. Note, the depth that each sphere goes into the wax.
i) Which property of substance can be studied with this procedure?
ii) Describe that property in minimum words.
iii) Explain the rule of heat exchange with this property.


Write down the approximate temperature at which the water boils in a pressure cooker.

State factors on which the amount of heat radiated by a body depends.


Consider the statement given below and choose the correct option.

Assertion: Radiation is a form of heat transfer which takes place only in vacuum.

Reason: The thermal energy is transferred from one part of a substance to another part without the actual movement of the atoms or molecules.


For a gas, `"R"/"C"_"v"=0.4`, where R Is universal gas constant and Cv is the molar specific heat at constant volume. The gas is made up of molecules, which are ______


Specific heat capacity C =  ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×