2024 Wk5 Hw Flashcards
Are insulator more Dense or less Dense?
Less Dense
Are Conductors good or bad at transferring heat?
Good
What is the formula for Energy Efficiency?
Useful Energy(J)/Total Energy Input X 100
Why do darker colours heat up faster/more?
Because they reflect less light, they absorb most of the Solar Energy
Do Particles vibrate more or less when they are heated up?
More
When particles are heated up, do they become more or less dense?
Less
What state of Matter is the best conductor?
Solids
What State of Matter is the worst at conducting Heat?
Gas
The particles move in a perpendicular direction to the direction of the wave. What type of wave is this?
Transverse Wave
The particles move parallel to the direction of the wave. What type of wave is this?
Longitudinal Wave
The measurement of the wave, peak to peak or trough to trough. What is it called?
Wavelength
The measurement of how many peaks or troughs pass through a certain point in a second. What is this?
Frequency.
Does a high frequency sound have a low pitch or high pitch?
High
Does a Low pitch noise have have a long wavelength or short wavelength?
Long Wavelength.
What medium does Radiation work in?
Any Medium
What Medium does Convection work in?
Fluids (Gases and Liquids)
The force that pushes and electric current
Voltage
The measurement of flow of Electrons
Current or Amps or A
What is Ohm’s Law Resistance?
Voltage = Current X Resistance
A circuit is made up of a battery and 2 light bulbs, they are wired one after the other. What is this called?
A series Circuit
A circuit is made up of a battery and 2 light bulbs. The light bulbs are not wired one after the other but on separate branches. What is this called?
This is called a Parallel circuit.
What is the formula to find Current or Amps?
Voltage/Resistance
What is the formula to find Resistance?
Voltage/Current (or Amps or I)
Will a conductor have an almost empty or almost full valence shell?
Almost empty
Voltage Formula
V=Current x Resistance
What state of matter does sound travel through (fastest to slowest)?
- Solids
- liquids
- Gases
Sound travels faster in… because…
hotter objects because the particles are vibrating at higher speeds which causes the sound to travel faster.
How do you calculate Wavelength?
λ = wave speed/frequency
How do you calculate wave speed?
Speed(m/s)=Frequency(Hz)×Wavelength(m)
What are some properties of materials that are conductors (Heat)
They are dense, they are darkly coloured.
What is the definition of a wave?
A disturbance that moves through a medium from one location to another.
