Heat And Waves Flashcards
(47 cards)
What is pitch?
Determined by the frequency and wavelength often of a wave and determines how high or low a note is.
What is heat?
Heat is a form of energy transfer.
What is temperature?
Temperature refers to the measure of the average kinetic energy of the particles in a substance/object.
True or false: Heat moves from a warmer place to a cooler place
True
What are the three transfer methods:
Conduction, convection and radiation
What is conduction?
The transfer of heat through direct contact between to objects or substances.
Why does conduction occur?
This occurs because of a collision of particles in the hotter object, which transfers energy to the particles in the colder object.
What is convection
A heat transfer that occurs in fluids (liquids and gases) due to the movement of the fluid itself.
How does convection occur?
When a fluid is heated the particles gain kinetic energy and move faster, causing them to spread out and become less dense. The less dense, warmer fluid rises, while the cooler, denser fluid sinks. This creates a circular motion called convection currents.
What is radiation?
The transfer of hear energy through electromagnetic waves.
How does radiation occur?
Heat energy can be emmitted in the form of electromagnetic waves, such as infared radiation, and can travel through empty
space.
What is a conductor
A conductor relates to how well an object can transfer heat.
What Is an example of a conductor?
Metal is a better conductor than wood. This means metal will heat up quicker and release a higher temperature than wood.
This is because metal is more compact atomically so it is better at transferring heat.
What is an insulator?
An insulator relates to how well an object can resist heating up.
What is an example of an insulator?
Wood is a better insulator than metal. This means wood will resist temperature change longer than metal. This is because wood is less compact on the atomic level, better at resisting heat transfer.
Why can’t liquids and gasses conduct heat?
Atoms in liquids and gases are not tightly packed. Therefore they cannot transfer heat via conduction.
What are waves?
Waves can be described as a distubance that travels through a medium from one location
to another location. Measured in m/s. Velocity varied.
What are longitudinal waves?
A type of wave in which the mediums vibration is parallel to the direction of the wave, and the mediums displacement is in the same direction as that of the wave morement.
What kind of wave is a sound wave?
Longitudinal Wave
What is a transverse wave?
A transverse wave is a wave in which the vibrating element moves in a direction perpendicular to the direction of advance of the wave.
What kind of wave is a light wave?
Light is a transverse wave
What is wave frequency?
The number of wave crests passing through a point in a second. Measured in Hertz (Hz).
What is a wave period
The time required for the wave crest at point A to reach point B.
What is Amplitude?
Amount of energy produced by a wave. Measured in decibels.
