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प्रश्न
Who am I?
Land and water get heated due to me.
उत्तर
Sunrays
संबंधित प्रश्न
Fill in the blank
A person is said to have fever if his body temperature is more than _________
Two bodies at different temperatures are placed in contact. State the direction in which the heat will flow.
Explain, why are the taps left dripping in sub-zero temperatures during winter?
What causes a change in the temperature of a body?
Is conduction possible in vacuum?
Convert the following temperature into Fahrenheit scale:
600C
Convert the following temperature into Celsius scale:
95oF
Give a scientific reason for the following:
It is better to use thin blankets to keep the body warm rather than using a single blanket of thickness equal to their combined thickness.
The following figure shows a copper washer. Explain, giving reasons, whether the following characteristics of the washer increase, decrease, or remain the same when it is heated.
(a) Internal diameter
(b) Volume
(c) Mass
(d) Density
(e) External diameter
What makes the isotherms run zigzag over continental areas?
Analogy
Heat : Joule :: Temperature : _____
Numerical Problems.
An iron ball requires 1000 J of heat to raise its temperature by 20°C. Calculate the heat capacity of the ball.
Thermal energy always flows from a system at higher temperature to a system at lower temperature.
______ determines the direction of the flow of heat.
Assertion: Temperature is the measure of heat energy.
Reason: Energy is the capacity to do work.
What will be the final temperature if 1,68,000 J of heat is absorbed by 2 kg of water at 30°C?
