Physics 1
What is Thermal motion?
Particles are in that state because theu have some temperature. This motion called thermal motion.
Three main ideas in molecular kinetic theory?
1 Consist of small particles
2 Random motion
3 Interact each other
What is diffusion?
Water molecules are in motion. The spread of malecules of one liquid is called Diffusion.
What is conduction?
Conduction is when heat flows by the collision of faster perticles in solids.
What is convection?
Convection is heat transfer because of the movement of a fluid. Fluid moves from places of higher temperature to lower temperature.
What is radiation?
Radiation is the heat transfer by electromagnetic.
Which materials can hold air.
Fur and Feathers
What is Heat combustion?
The energy you get from burning 1kg of fuel is called heat combustion?
What is heat exchange?
Heat can flow from one object to another.
What is thermal equilibrium?
Heat can flow from one object to another. When they reach the same final temperature, heat flow stops. We say the bodies reach thermal equilibrium.
What is concervation of energy?
The heat lost by the hot object is equal to the heat gained by the cold object. This principle is called conservation of energy.
What is melting?
The particles start to vibrate faster. At a certion temperature, particles have enough kinetic energy to break solid structure and turn into liquid.
What is freezing?
The substance contracts because of slower vibrations. At a some moment, particles start to from strong bonds with each other.
What is condensing?
When we cool a gas speeds of particles decrease they lose kinetic energy. Then the gas particles come closer to become liquid.
What is humidity?
Humidity is the current amount of water in the air. We use the unit of density to show it. For example, if humidity is 11 g/m3, this will mean that each cubic meter of space contains 11 g of water