18 Questions
What is heat?
A form of energy that flows between two bodies of different temperatures
Why do we feel hot when the Sun shines?
As a result of the Sun being a source of heat energy
How can other forms of energy be converted into heat?
By driving air molecules into a smaller space
What does an increase in temperature of a system indicate?
An increase in the internal energy of the system
What happens when work is done on an object?
The object's temperature increases
What is the internal energy of a body related to?
The average activity of atoms and molecules in motion within the body
What happens to the heat of a body when the velocity of its molecules decreases?
The heat decreases
Which symbol is commonly used to indicate heat?
$\mathcal{Q}$
According to the law of conservation of energy, what happens to energy?
Energy can change from one form to another
In Einstein's equation E=MC2, what principle combines the conservation of energy and matter?
Conservation of mass energy
What is the SI unit used to express heat?
Joule
How many calories are equivalent to 1 kilocalorie?
100 calories
What does the heat capacity of a substance indicate?
The amount of heat required to change its temperature
Which unit is used to express specific heat?
Calorie per gram per degree Celsius
What is the definition of specific heat of a substance?
The heat required to cause a temperature change in the same mass of water
Why can a large body of water moderate temperatures effectively?
Due to its high specific heat capacity
What is indicated by the symbol 'c' in the context of specific heat?
Specific heat of the substance
How does a large body of water affect the temperature of its surroundings?
By absorbing and releasing significant quantities of heat
Learn about the basics of heat energy, how heat flows between different temperature bodies, and practical uses of heat in everyday life. Discover how the Sun is a major source of heat energy on Earth.
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