Heat & Thermodynamics
Objectives:
Thermal Physics: Physics Online Classroom
Heat is energy in transit from a body of higher temperature to a body of lower temperature.
Heat obeys the law of energy conservation. So when a body cools, something else warms up.
What is the most standard unit for heat and how is it defined?
Why does rising warm air cool? rising warm air, like a rising balloon, expands. Why? because less atmospheric pressure squeezes on it at higher altitudes. As the air expands, it cools- just the opposite of what happens when air is compressed.
So the two ways of how the heat is transferred is by conduction and convection but that doesn't explain how earth gets heated. That involves "RADIATION" which is energy provided to us from the sun in the form of electromagnetic waves.
Also things that give the sensation of heat like a burning fire all emit both infrared radiation and visible light. The part that is absorbed increases the internal energy of the objects.
Objectives:
- Describe temperature in terms of kinetic energy and describe the common temperature scales
- Define heat
- Explain conduction, conduction and radiant energy
- Define conductors and insulators
- Describe how water's specific heat capacity affects climate
- What is the first law of thermodyamics
Thermal Physics: Physics Online Classroom
Heat is energy in transit from a body of higher temperature to a body of lower temperature.
Heat obeys the law of energy conservation. So when a body cools, something else warms up.
What is the most standard unit for heat and how is it defined?
Why does rising warm air cool? rising warm air, like a rising balloon, expands. Why? because less atmospheric pressure squeezes on it at higher altitudes. As the air expands, it cools- just the opposite of what happens when air is compressed.
So the two ways of how the heat is transferred is by conduction and convection but that doesn't explain how earth gets heated. That involves "RADIATION" which is energy provided to us from the sun in the form of electromagnetic waves.
Also things that give the sensation of heat like a burning fire all emit both infrared radiation and visible light. The part that is absorbed increases the internal energy of the objects.