Heat 3
In this part of video I am converting the chapter "Heat" into the form of question and answer. This is part 3. Following questions are answered in this video with necessary figure.
57) What is specific heat capacity?
58) What do you mean by specific heat capacity of water is 4200 J/ kg 0C.
59) What is SI unit of specific heat capacity?
60) Write down the value of specific heat capacity of water, paraffin oil, mercury, sand and iron.
61) Why does specific heat capacity of objects differ?
62) Write down property of substance having high specific heat capacity.
63) Write down property of substance having low specific heat capacity.
64) Well water is warmer in the morning during winter season, why?
65) Why oil becomes hotter than water when equal mass of water and oil are heated for equal time.
66) Why water is used as cooling agent to cool down hot engine ?
67) Write the cause that night of desert is very cold and day is very hot.
68) Why water is used in car radiator ?
69) Two bodies ‘A’ and ‘B’ given below are heated up to 600C and then cooled to 200C. Which one loses more heat energy, why?
70) Why water is used in hot water bag?
71) Temperature of an island remains more or less constant throughout the year. Why?
72) Specific heat capacity of three different substances is given below.
i) What do you mean by the specific heat capacity of ‘A’ is 910 J/kg0C?
ii) Which above substance will gain more temperature while heating equal mass of all the three substances supplied with equal amount of heat?
iii) Which will go down more in depth when equal mass of all these three substances heated for the same temperature of 1000C and kept on a wax slab, why?
73) Which one would have greater amount of heat energy among 1kg water of 1000C and 1kg iron of 1000C ? Give reason.
74) What is heat equation ?
75) Write down heat equation with unit of each physical quantity.
i) What do you mean by the specific heat capacity of ‘A’ is 910 J/kg0C?