FINALS!!

Question 0

Conduction

Answer 0

Is the transfer of thermal energy between neighbouring molecules in a substance. You heat up one end of a metal rod and the other end gets hit. there has to be direct contact
*2 bodies must be different temperatures

Question 1

Convection

Answer 1

The transfer of heat energy that happens when heated liquid or gas particles move from one location to another. Particles gain energy near heater. Warm air is rising, cool air from the side replaces heated air causing a circular convection current.

Question 2

Radiation

Answer 2

Transfer of energy by electromagnetic. Heat radiation is the infrared portion of the electromagnetic spectrum.heat radiation can travel through gases. Black rough, surfaces= absorbing radiant heat. Smooth white surfaces= reflecting heat

Question 3

Thermal Energy

Answer 3

The total of all kinetic and potential energies or the total energy of all particles in a substance.

Question 4

Heat

Answer 4

The THERMAL ENERGY transferred from one object to another due to different temperatures

Question 5

Temperature

Answer 5

The measure of the average kinetic energy of the molecules of a substance

Question 6

Thermal expansion

Answer 6

Is the tendency of matter to change in length and volume in response to change in temperature. The amount of thermal expansion depends on the type of material that a substance is made up of.

Question 7

Volumetric Expansion

Answer 7

This is the changing of an objects volume due to a temperature change. Mainly used for gases and liquids as they will take on the shape of any container.

Question 8

Linear Expansion

Answer 8

This is the lengthening of an object due to a temperature change.

Question 9

Mixtures

Answer 9

The Law of Conservation of energy states that “in any transfer or transformation of energy, the total amount of energy remains constant”. When 2 substances at different temperatures are mixed together, the warmer substance loses heat to the cooler substance.

Question 10

Calormimtery

Answer 10

The precise measurement of heat exchange using this tool. It is designed to ensure that all the heat exchanged between 2 items occurs inside the vessel, not with the surroundings.

Question 11

Specific Heat Capacity

Answer 11

The quantity of heat required to raise the temperature in aunt of mass of a substance by a unit change in temperature.

Question 12

Specific Latent Heat

Answer 12

The quantity of heat energy required to change the state of a unit mass of a substance.

Question 13

Latent Heat of Fusion

Answer 13

Is the quantity of heat energy released when 1 kg of a substance solidifies without changing its temperature.

Question 14

Latent Heat of Vaporization

Answer 14

Is the quantity of heat energy needed to vaporize 1 kg of a substance without changing its temperature.

Question 15

Anomalous Substance

Answer 15

Water exhibits anomalous behavior. From 0 C to 4 contracts as heated. It also expands when it freezes. The expansion results in a decrease in density, allowing ice to float on water. Most liquids reach their maximum density at freezing point but not with water.

Question 16

Laws of Thermodynamics Zeroth

Answer 16

Two systems in thermal equilibrium with a third, are in thermal equilibrium with each other
If A=C and B=C THEN A=B (Transitive Relation)

Question 17

Law of Thermodynamics First Law

Answer 17

The quantity of heat energy transferred to a system is equal to the work done by the system plus the change in the internal energy of the system. (law of conservation of energy)

Question 18

L.O.T. 2

Answer 18

The natural flow of heat is from a hot object to a cold object. Energy, when converted from one form to another, can only be lost not gained.

Question 19

L.O.T. 3

Answer 19

Absolute zero cannot be reached. Absolute zero is the temperature which all molecular movement stops.

Question 20

Waves

Answer 20

Disturbance that moves outward from its point of origin transferring energy through a medium by means of vibration

Question 21

Medium

Answer 21

Material, for example, air or water through which waves travel

Question 22

Pulse

Answer 22

Disturbance in a medium of short duration, usually seen as a crest or trough of a wave

Question 23

Periodic Wave

Answer 23

Wave that is constant over period of time

Question 24

Transverse Wave

Answer 24

Wave with the motion of the medium being perpendicular to the motion of the wave

Question 25

Longitudinal Wave

Answer 25

A wave whose displacement is in the direction of the motion of the wave

Question 26

Amplitude

Answer 26

Maximum displacement of a body from its equilibrium

Question 27

Frequency

Answer 27

Number of cycles per second measure in hertz (Hz)

Question 28

Wavelength

Answer 28

Distance between 2 points on a wave that have the same status. From crest to crest or trough to trough

Question 29

Decibel

Answer 29

The unit used to measure the intensity of sound. 0 dB is fixed near the threshold of hearing. A sound 10x more intense is 10 dB. A sound 100x is 20 dB and so on

Question 30

Echo

Answer 30

Are produced when sound is reflected by a hard surface, such as a wall or cliff.

Question 31

Pitch

Answer 31

Depends on frequency of sound wave. People can hear between 20-20 000 Hz

Question 32

Doppler Effect

Answer 32

Apparent change in a frequency of a wave caused by the relative motion between the source of the wave and the observer.

Question 33

Resonance

Answer 33

The response of an object that is free to vibrate to a periodic force with the same frequency as the natural frequency of the object