Topic 2
Wires made from two different twisted together
Thermocouple
What is the volume change between expansion and contraction?
Contraction= decrease in volume
Expansion= increase in volume
transfer of energy in the form of electromagnetic waves
radiation
a method of energy conservation by which waste heat or energy from one industry is used by another industry
cogeneration
In an infrared thermometer what are the cold and warm colours.(In that order)
Cold:Purple, blue
Warm:Red, Orange, Yellow, White
Evaporative cooling is common. What is one example of this? Answers may vary.
A home-owner sprays the roof of a house with water to cool the house on a hot summer day.
What is the name of the change in state when it is gas to solid
Sublimation (Deposition)
Liquids that evaporate easily at low temperatures.
refrigerants
What is the freezing point and boiling point of water on the Kelvin scale and what is the coldest possible temperature on the Kelvin scale?
Freezing point: 273K Boiling point: 373K Coldest possible temperature: 0K
What does the particle model of matter state?
1. All matter is made up of extremely tiny particles
2. Particles have spaces between them
3. Particles are always in motion
What are the three ways to transfer thermal energy?
-Radiation
-Conduction
-Convection
What percentage does fossil fuels cover of the province's electrical energy?
80% of the province
What is the difference between thermocouple and bimatallic strip
In a thermocouple two wires are twisted together and when heated it sends an electrical current which can switch on and off. Meanwhile, a bimetllic strip has two wires joined together and when heated on expands more than the other which causes the strip to curl.
What is the difference between thermal energy, heat, and temperature?
thermal energy is the total kenetic energy
heat is high energy to low energy
temperature is the measure of the average energy of particles.
What are the five features of the energy transfer system?
-Energy source
-Direction of Energy Transfer
-Transformations
-Waste Heat
-Control Systems
Why is sulfur dioxide so dangerous?
The gas is very irritating to the eye, nose, and throat. People with asthma suffer greatly because of it.
How does the recording thermometer work?
The recording thermometer uses a pen which is attached to a bimetallic strip. Depending on how hot or cold something is the strip will coil and the pen makes a line on a rotating paper
What is hidden heat/latent heat?
During a phase change, the total energy of a substance increases or decreases. This occurs because the particles no longer increase or decrease their speed; the arrangement of the particles changes. The average energy of the particles, however, does not change. Therefore, the temperature of the substance stays constant. The energy change is hidden from thermometers.
Name all the waves in the electromagnetic spectrum
radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays.
What is carbon monoxide and where is the best place to put carbon monoxide sensors.
Carbon monoxide: when a fire burns without enough oxygen
It is best to put it on every floor of the house or near the garage.