The speed of a sound wave depends on what type of medium it is traveling through, and if that medium is a gas or liquid, a significant change in temperature can also affect its speed. In air, the speed at which sound travels is about 1 mile every 5 seconds at 32 degrees Fahrenheit, but the speed of a sound wave traveling through solid rock is about 18 miles every 5 seconds. Sound travels faster through a solid substance like rock because, unlike liquids or gases, the molecules in a solid are held close together.
A sound wave is a compression wave that transfers energy from one molecule to the next as it travels through a medium. Unlike electromagnetic waves, sound waves must have a medium to travel through and cannot propagate across a vacuum. While sounds waves are propagating, they can be attenuated, refracted or reflected by the type of medium they travel through or encounter. The physical properties of the medium will determine the manner in which sound waves are affected.Learn More
An echo is caused when sound waves bounce off of a surface and travel back to the ears. Echoes commonly occur when loud sounds are emitted into an empty room or down a well. The echo occurs when sound is reflected off water in the well or walls in rooms.Full Answer >
Two types of theodolites are the repeating theodolite and the direction theodolite. The repeating theodolite takes angle readings on a graduated scale. The direction theodolite takes readings on a circle at every direction and is useful for triangulation. Both types of theodolites are used to measure vertical and horizontal angles.Full Answer >
Sound waves, earthquakes and ocean waves are all examples of mechanical waves. Longitudinal waves, transverse waves and surface waves are the three types of mechanical waves.Full Answer >
Wavelength measures the distance from one point of a wave to the same point on an adjacent wave, whereas the frequency represents how many waves are produced from the source per second. Wavelengths are measured in nanometers and frequencies are measured in hertz or waves per second. When wavelength decreases, frequency increases because the distance between waves is shorter.Full Answer >