what is the method of mixtures ?
A. Heat lost by hot body= heat gained by
Cold body
2• what are the factors influencing the heat
A. 1) mass of the body
2) specific heat of the material
3) temperature
3• 1 calorie is equal to how many joules?
A. 1 calorie = 4.2 joules
4 • which substance has highest value of
Specific heat among liquids ?
A. Water [ in gases hydrogen 14300 J/kg°C]
5.water is used as coolants in radiaters thermal power stations etc why ?
A.specific heat of water is high 4190 J/ kg°k
6.why only copper is used for manufacturing calorimeter?
A.copper's specific heat is low and best conductor.
7.solid is preferred to heat in regnault's heater rather than heating it directly why?
A.when heated with steam heater solid is heated uniformly and reaches constant temperature.but when heated directly solid may not reach a constant temperature and it is easy to transfer solid from regnault's heater
No comments:
Post a Comment