Show:
Waves
Wave Properties
Wave Interactions
Thermal Energy
Work & Machines
100
What are waves that require a medium through which to travel called?
What are mechanical waves?
100
What is the distance between 2 corresponding parts of a wave called?
What is the wavelength?
100
What does the law of reflection state?
What is the angle of incidence = the angle of reflection?
100

What is the transfer of thermal energy between objects called?

What is heat?

100

When work is negative in means that energy...

What is leaving the system/object?

200
What is a wave that moves the medium at right angles to its direction called?
What is a transverse wave?
200
What is the number of waves that pass a given point in a given amount of time?
What is frequency?
200
What is the bending of waves due to a change in speed called?
What is refraction?
200

Which material is a better conductor of thermal energy: metal or wood?

What is metal?

200

Friction is responsible for reducing the ____________ of a machine.

What is efficiency?

300
What is the ability to do work?
What is energy?
300
What is the unit of measurement of frequency?
What is a hertz?
300
What occurs when two waves combine to form a wave with a smaller amplitude?
What is destructive interference?
300

This type of heat transfer occurs through the movement of fluids such as air and water.

What is convection?

300

A machine with a mechanical advantage greater than 1 will _________ the input force.

What is increase?

400
What are the parts of a longitudinal wave where the particlies are pushed together?
What are compressions?
400
What is the mathematical formula used to calculate the speed of a wave?
What is speed = wavelength x frequency?
400
What occurs when external vibrations match an object's natural frequency?
What is resonance?
400

The amount of energy required to raise the temperature of 1 kilogram/gram of a substance by 1 degree Celsius is called...

What is specific heat?

400

What are two ways in which a machine helps make doing work/tasks easier?

What is increasing output force/ increasing speed/ changing direction of a force/ decreasing the output force?

500
What does the rarefaction in a longitudinal wave correspond to in a transverse wave?
What is a trough?
500
What is the frequency of a wave with a speed of 3m/s and a wavelenght of 0.2m?
What is 15 Hz?
500

What wave behavior explains why you can hear people inside a classroom talking even before you stand in front of the doorway?

What is diffraction?

500

In which direction does thermal energy always flow?

What is from high temperature to low temperature?

500
A person is applying a force on an object, but no work is being done. Explain why this could be the case? (Explain why even though there is a force being applied, work may not be happening)

What is the object is not moving/ force and movement are in perpendicular directions?