Radiation
What colour radiates heat the best?
Black
Why is a sloped ramp or air track used?
To reduce friction
What do we call a straight line going through zero?
Directly proportional
What unit is used to measure wave speed?
m/s
How can you adjust the equipment to get a standing wave you can see?
Adjust frequency
Move bridge
Add mass
What colour reflects heat the best?
Silver
What is used to measure the acceleration?
Light gates
What do we call it when the spring stops behaving proportionally?
Elastic limit
Limit of proportionality
WHat unit is used to measure frequency?
Hertz
A wave is 0.8m long and has a frequency of 55Hz what is its speed?
44m/s!!
What is the smallest change that most thermometers can measure?
1 degree
What happens to the acceleration when you increase the force applied?
Increases
What are the units of spring constant?
N/m
What unit MUST be used to measure wavlength?
Metres
What is the top of a wave called?
Peak
Crest
What is the cube called that is used in the infra red radiation experiment?
Leslie
What happens to the acceleration when you increase the mass?
It decreases
Spring constant x Extension =
Force
How can you freeze the images of the waves?
Photo
How many hertz is 2kHz?
2000
What is the most important control variable when detecting infra red radiation?
Distance
Temperature
Mass x Acceleration = ?
Force
Where you put you eye when measuring the extension of a spring is important as it reduces what type of error? Random or systematic
Random
If a wave has a length of 0.2m and a frequency of 10Hz what is its speed?
2m/s
What happens to speed of a wave on a string if you used a thinner string?
Increases