Advertisements
Advertisements
Question
Why does the bottom of a lake not freeze in severe winter though the surface is all frozen?
Advertisements
Solution
Lakes don’t completely freeze because the ice (and eventually snow) on the surface acts to insulate die water below. To freeze water into ice, a large quantity of heat is to be withdrawn. This heat cannot be
APPEARS IN
RELATED QUESTIONS
Define one kilo-calorie of heat.
What will absorb heat?
Glass
Which temperature segment is chosen when determining the unit of heat? Why?
Which of the following substances will absorb more heat energy?
The sun gives us light and heat.
In the past, people used to rub two wooden pieces together to light fire.
The water in the black can becomes ______ than that in a white can after exposure to the sun.
You would have noticed some space being left on railway tracks. Why?
Warm air is ______.
