Models for energy transfer
Define Energy
The ability to do work
What are the two types of mechanical waves?
Transverse and Longitudinal waves
How do you measure amplitude?
It can be measured from the middle of the wave (the rest axis) to a crest or to a trough.
A wave machine in pool generates at a frequency of 0.5Hz. Calculate the period of each wave.
T=2s
What is the most common last name in Australia
Smith
What are the two models scientists use to explain energy transfer
The Wave and the Particle model
How do mechanical waves transfer energy?
Mechanical waves transfer energy through matter by the vibrations of particles.
How do you measure a Transverse wave?
transverse wave: the distance from crest to crest or from trough to trough
A wave rolling through a harbour is travelling at 3 m/s and has a wavelength of 0.5m. Calculate the frequency if the wave.
6Hz
What is the only body part that is fully grown at birth?
The Eyes
What does the wave model explain?
How energy can travel as a wave through space without carrying matter along the way.
What are the highest and lowest points of a mechanical waves known as?
Highest = Peak
Lowest = Trough
Define the period
The period is determined by timing how long it takes for one wave to pass or counting the number of full waves that pass by a single point in a certain amount of time
A tap is dripping into a bowl of water. Drops of water produce water waves from the point where the drops hit the surface of the water. If the frequency of drops from the tap is 5 Hz, calculate the period of each wave produced.
T=0.20s
How many dots appear on a pair of dice
42
• passing energy between one another through direct contact.
• moving through space and carrying energy with them, transferring the energy to a new space.
What are the two forces that dictate an electromagnetic wave
Electric field and Magnetic field
What is the equation for measuring speed?
Velocity = Distance/time
Which is the only continent to span all 4 hemispheres (north, south, east and west)?
Africa
Define a Model in Scientific terms
A model is a representation that describes, simplifies or provides an explanation of the workings, structure or relationships within a particular phenomenon, object or idea.
What are the 5 features of waves and what is their symbol?
Amplitude (A)
Wave Length (λ)
Frequency (f)
Period (T)
Speed (v)
Calculate the speed of a wave that travels 340m in 4 seconds.
85 m/s
Red light travels at a speed of 300 000 000 m/s and has a wavelength of 0.000 0007 m.
Calculate the frequency of the waves of red light.
4.29x1014 Hz
If you get a two under par in golf, what is it called? (hint: its the name of a bird)
An Eagle