Table of Contents
What is it called when particles are pushed together?
Mechanical waves in which the particles of matter in the medium vibrate by pushing together and moving apart parallel to the direction in which the wave travels are called compressional or longitudinal waves.
What is amplitude measured in?
Amplitude is measured in metres ( ). The greater the amplitude of a wave then the more energy it is carrying. The wavelength, , of a wave is the distance from any point on one wave to the same point on the next wave along.
When particles or waves are spread apart in a longitudinal wave they are called?
rarefactions
In a longitudinal wave, particles of the medium vibrate in a direction that is parallel to the direction that the wave travels. Places where particles of a medium crowd closer together are called compressions, and places where the particles spread farther apart are called rarefactions.Muh. 20, 1441 AH
What waves are transmitted by compression and rarefaction?
Sound waves traveling through air are indeed longitudinal waves with compressions and rarefactions. As sound passes through air (or any fluid medium), the particles of air do not vibrate in a transverse manner.
In which units are frequencies measured?
The SI unit for frequency is the hertz (Hz). One hertz is the same as one cycle per second.Rab. II 27, 1431 AH
How do you measure the frequency of a water wave?
Divide the wavelength into the velocity to calculate the frequency, expressed as described above as the number of cycles per second, or Hertz – written “Hz.” For example, a water wave with a wavelength of 1 foot traveling at a speed of 4 inches per second has a frequency of 1/3 feet/second divided by 1 foot = . 33 Hz.Jum. I 7, 1442 AH
Can a student draw the movement of particles?
However, the fact that students may be able to draw the usual static arrangements of particles in solids, liquids and gases does not mean that they hold a fully particulate view of matter.
How do particles move in a liquid container?
In liquids, particles are quite close together and move with random motion throughout the container. Particles move rapidly in all directions but collide with each other more frequently than in gases due to shorter distances between particles.
These changes in particle spacing are also changes in pressure. Pressure increases when particles are squeezed together and reduces when they move apart. It is these changes in pressure that can be detected by organs such as the human ear and are sensed as sound.
Why do particles move faster in one direction than another?
Particles move rapidly in all directions but collide with each other more frequently than in gases due to shorter distances between particles. With an increase in temperature, the particles move faster as they gain kinetic energy, resulting in increased collision rates and an increased rate of diffusion.