Physical Sci ch 10
Terms
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- A wave is a disturbacne that transmits ___________.
- ENERGY
-
During Constructive Intereference
a) Amplitude Increase
b) Frequency Decrease
c) Wave Speed Increase
d) All of the Above - A: Amplitude Increase
- A __________ is any disturbance that transmits energy.
- WHAT IS A WAVE
- What are some things in daily life that use " waves"
-
Microwave
Radio
Sound
Water -
True or False
Energy can be carried by a wave - TRUE
- How does a "wave" travel?
- It uses energy.
- A ___________ is a substance through which a wave can travel.
- WHAT IS A "MEDIUM"
- A medium can be in what three forms?
-
SOLID
LIQUID
GAS - What type of waves require a medium?
- SOUND WAVES
- ________ is the medium of which sound waves travel in.
- AIR
- Sound waves can travel through which medium ( media)
-
SOUND
LIQUID
GAS - How do sound waves travel?
- As Vibrations
-
TRUE OR FALSE
Sound can be heard with out a medium -
FALSE
You will not hear the sound if there is no particle to vibrate against. - Waves that need a medium (media) are called___________ waves
- MECHANICAL
- Describe how a longitiudial wave travels.
- The particles of the medium vibrate back and forth the path that the wave travels.
- What type of wave is a longitudinal wave?
- SOUND WAVE
- A ____________ wave is when there is a boundary of two media.
- TRANSVERSE WAVE
- Describe how transverse waves work.
- Waves move in circles verses up and down.
- How do transverse waves differ from longitudinal waves.
- Transverse waves move across to the direction of the wave. Longitudinal Waves move back and forth like a spring
- Why could we not hear an explosion on earth?
- Beause there is no air, gas, or water to have the sound travel in.
- What kind of waves do not require a media.
- Electromagnetic Waves
- Give some examples of electromagnetic waves./
-
X-Ray
Microwave
TV Signal
Radio Signal - The _________ of a wave it the maximum distance the wave vibrates
- AMPLITUDE
- The larger the amplituede is the _________ the wave is.
- TALLER
- Larger amplitude means (larger) or (smaller) amount of energy
- LARGER
- Give an example with a jump rope.
- You have to shake the rope harder to make the waves "larger" verses less energy to make "smaller" waves
- The _______ is the distance between two adjacent crests or compressions is a series of waves.
- WAVELENGTH
-
True or False
All wave lengths will be equal from one point to the next. -
TRUE
If you measure at any given wavepoint. the measurement will be the same for any given wave. - The number of waves produced in a given amount of time is called the ________.
- FREQUENCY
- How is frequency measured?
- Counting the number of crests
-
The __________ of a wave is the maximum distance the wave vibrates from its resting position.
DRAW A WAVE AND SHOW THE AMPLITUDE AND WAVE LENGTH - AMPLITUDE
- The speed in which a wave travels is the ___________.
- WAVE SPEED
- How can wave speed be calculated?
- Wavelength x Frequency = SPEED
-
What is the speed of the following
Frequence (f) = 3/second
Wavelength = 0.5m - .05M X 3hX = 1.5 M/S
- _____________ is the bending of a wave as it passes at an angle from one medium to another.
- REFRACTION
- Give an example of refraction:
- The speed changes when an object is falling from air to water. It will travel faster through air, then slow down as it travels through water,
- _______________ is the bending of waves around a barrier.
- DIFFRACTION
- Why can you hear sound through a barrier better than see light through the same barrier.
- Sound waves are much longer than light waves.
- What is interference
- When two waves meet in the same space
-
Describe an incident of interference with musical instruments.
What happens with the sound - Sound Waves are traveling all at the same time from each instrument. When together, it creates a louder sound becasue they overlap
- What happens when a wave is refracted?
- The speed changes. This causes the wave to bend.
- A ____________ wave is a wave that forms a stationary pattern.
- STANDING WAVE
- Describe what happens in a standing wave. Is it really still?
- Waves are traveling in two directions making it appear that they are still. Yet they are really moving.
- What is resonance and when does it occur?
-
When an object is vibrating at or near the frequency of another object.
The Xylophone is an example. The hitting with the mallot causes a vibration in the keys and the air. - How can resonance be destructive?
-
A Bridge:
You have vibratin from the cars and other elements like wind which cause a bigger vibration, which can cause a bridge to break - As the wavelength increases, the frequency _________________.
- Decreases
- What describes how we can hear sound around the corner.
- DIFFRACTION
-
WAVES TRANSFER...
a) Matter
b) Energy
c) Particles
d) Water - ENERGY
- Waves that dont require a medium are?
- ELECTROMAGNETIC