Unit 6 - Sound and space Flashcards
What is a amplitude?
The height of a wave from the resting point
(from mid-point to the top)
What is a wavelength?
Distance between the same point on neighboring waves
What is a frequency?
Number of wavers per second measured in Hertz(Hz)
What happens to the sound(or wave) when the amplitude increases?
The greater the amplitude the louder/bigger the sound wave.
How does sound wave travel?
Through the vibration
What happens to the pitch when the longer the wavelength is?
The pitch get’s lower.
What do you call the top and the bottom part of a wave?
Top - peak/crest
Bottom - through
What does the loudness of sound depends on?
The greater the distance of each vibration louder the sound and the further the object the quieter the sound.
What is the equipment to display waveforms called?
Oscilloscope
What does the frequency of vibration of a guitar depend on?
It depends on the mass of the string
(more mass -> slower vibration -> lower frequency)
What is a interference of a sound?
What effects can be produced.
The effect produced when two or more waves meet. Only happens when the waves are the same type. The waves can reinforce or cancel each other.
What happens when the sound waves reinforce?
When can the waves reinforce?
The amplitude of 2 waves are added together (louder) and the frequency doesn’t change.
Waves reinforce when the the peak or through meets.
What happens when the sound waves cancel?
When can the waves cancel?
Waves cancels when the peaks and troughs are together. Also when freq and amp is same.
When the waves cancel, the waves add up together to make zero (max pos amp + max neg amp) This means there is no sound.
What are the 2 theories of how moons formed?
- The moon was formed by splitting away from Earth when Earth formed.
- The collision theory
What is the collision theory?
It is a theory that A planet (about mars size) collided with Earth, forming the moon.
The impact would have made a debris and the debris came together to form moon.
