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The best way to transfer energy from the driving force into the oscillator is at resonance.
The suspension system of a car is not immune to resonance.
Even though finely engineered shock absorbers convert mechanical energy to thermal energy almost as fast as it comes in, speed bumps still cause a large-amplitude oscillation.
If you travel at the wrong speed on a gravel road, the bumps are very noticeable, whereas if you travel at the right speed, the bumps are not as noticeable.
The Millennium Bridge in London was closed for a short period of time due to an inspection.
The chest is an example of a system at resonance.
The system is highly efficient because it is critically damped.
The bridge in Washington state collapsed in 1940.
The bridge was hit by heavy cross winds.
The performer needs to be singing a note that matches the glass's natural frequencies.
The glass responds to a sound wave by replicating the sound wave's frequencies.
The glass begins to vibrate and shatter when enough energy is introduced into the system.
Waves in the ocean are the same as all other waves.
The familiar water wave is the most intuitive wave to imagine.
Water waves can be created by a rock thrown into a pond or a swimmer splashing the surface repeatedly.
The air pressure in the speaker may have caused the sound waves to change.
There are several types of earthquakes, including pressures under the surface and Earth's surface.
An analogy with water waves is how radio waves are most easily understood.
There is more to water waves than just a mental image.
Water waves have characteristics that are common to all waves.
A small set of underlying principles can be used to describe wave characteristics.
A wave is a movement from the place it was created.
The simplest waves are associated with simple motion.
The simplified water wave is an up and down disturbance of the water surface.
As the wave crests and troughs pass under the bird, it causes a sea gull to move up and down in a simple motion.
The wave's period is the time for one complete up and down motion.
The wave's Frequency is the same.
The wave moves to the right.
The wave is moving to the right, not the water itself, as the bird would move to the right.
propagation speed is also known as wave velocity, because the disturbance travels from one location to another.
Water waves push water from one direction to another.
The particles of water tend to stay in one place, because of the energy in the wave.
The water stays in one place as the energy moves through it.
If you feel pushed in the ocean, what you feel is the wave's energy, not a rush of water.
An idealized ocean wave passes under a sea gull that bobs up and down.
The wavelength is the distance between adjacent parts of the wave.
The surface moves parallel to the surface at a fast pace.
The distance the wave travels in a given time is the speed of propagation.
All types of waves are held together by this fundamental relationship.
For water waves, is the speed of a surface wave; for sound, is the speed of sound; and for visible light, is the speed of light.
Wait for the water to settle in a large bowl or basin so there are no ripples.
Put a cork in the middle of the bowl.
Estimate the wavelength and period of the water wave that travels away from the cork.
Wait for the water to settle and remove the cork from the bowl.
The cork should be dropped at a different height than the first drop.
We can find the wave velocity.
This slow speed is reasonable for an ocean wave.
The wave moves to the right in the figure at this speed, not the varying speed at which the sea gull moves up and down.
A simple wave is a periodic disturbance that travels from one place to another.
The speed of propagation does not affect the size of the disturbance.
In this example of a wave, the wave propagation is horizontal and the cord is vertical.
In this example of a longitudinal wave, the wave propagation is horizontal and the cord is in the opposite direction.
Waves can be a combination of the two.
There are waves on the strings of musical instruments.
Waves in the air and water are related.
Transient variations in pressure are transmitted in fluids.
The sound waves in fluids must be longitudinal or compressional because they don't have shear strength.
Longitudinal and transverse sound can be heard in a solid object.
The guitar string has a wave on it.
A sheet of paper rattles in a direction that shows the sound wave is longitudinal.
The compressional and shear components of earthquake waves under Earth's surface.
The components have important individual characteristics.
The surface waves on water are similar to the surface waves on earthquakes.
The motion of the wave can affect the propagation of energy in a different direction.
Understanding how different types of waves affect the materials around them is important.
A string is vibrating in slow motion.
If you want to make waves, jiggle the end of the string.
The end can be loosened or fixed.
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