A. A sea breeze is due to convection in air
B. Cotton materials are better than woolen ones for use in hot weather
C. Convectional currents play an important role in the cooling of the engine of a motor car
D. The vacuum space in a flask helps to reduce heat loss by radiation.
Correct Answer:
Option D – The vacuum space in a flask helps to reduce heat loss by radiation.
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![An immersion heater rated 400W, 220V is used to heat a liquid of mass 0.5kg. If the temperature of the liquid increases uniformly at the rate of 2.5ºC per second, calculate the specific heat capacity of the liquid. [Assume no heat is lost]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "An immersion heater rated 400W, 220V is used to heat a liquid of mass 0.5kg. If the temperature of the liquid increases uniformly at the rate of 2.5ºC per second, calculate the specific heat capacity of the liquid. [Assume no heat is lost]")