MEDIUM
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Which type of trade occurs within the geographical boundaries of a country?

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Important Questions on Linear Inequalities

MEDIUM
Approximately seventy percent of carbon-dioxide absorbed by the blood will be transported to the lungs:
EASY
In which of the following process, convection does not takes place primarily?
EASY
Which method of heat transfer depends on gravity?
HARD
In which of the following processes, convection of heat does not take place?
MEDIUM
Ventilators are provided in rooms just below the roof. Why?
EASY
An ordinary electric fan does not cool the air; still, it gives comfort in summer. Explain.
EASY
Why convection cannot take place in a solid?
EASY
Two liquids A and B are at 32°C and 24°C. When mixed in equal masses the temperature of the mixture is found to be 28°C . Their specific heats are in the ratio of
EASY
Permanent winds blowing toward the equator are called _____.
EASY

Assertion: It is hotter over the top of fire than at the same distance on the sides.

Reason: Air surrounding the fire conducts more heat upwards.

MEDIUM
Trade wind is an example of which of these?
HARD
The human circulatory system is an example of natural convection.
EASY
In summer, a mild wind is often found on the shore of a calm river. This is caused due to,
EASY
State the unit and dimensions of coefficient of convection?
EASY
Which one of the following processes depends on gravity?
HARD
Explain how convection causes trade winds.
MEDIUM
It is hotter at the same distance over the top of a fire than it is on the side of it, mainly because :
MEDIUM
A liquid of mass m and specific heat c is heated to a temperature 2T. Another liquid of mass m2 and specific heat 2c is heated to a temperature T. If these two liquids are mixed, the resulting temperature of the mixture is
EASY
The equatorial and polar regions of the earth receive unequal solar heat. The convection current arising due to this is called: