The Count of Monte Cristo (2002 film)
2002
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Introduction to waves. Transverse and longitudinal waves are two types of mechanical waves, which involve the transfer of energy through a medium (e.g. water, air, a solid). Learn about transverse and longitudinal waves through the examples of a shaken rope and a sound wave.
- 13 min
- Sal Khan
- How does sound travel through wires?Andrew M's answer is definitely correct if you meant sound through an electrical speaker; however, if you are referring to a tin can telephone, the...
- How radio waves pass through walls, while light waves do not?To elaborate a bit, building materials are transparent to long wavelength waves because a wall will only absorb the energy of waves that have the r...
- how would you define energy?It's actually quite hard to define energy, but I would say @Ethan Dlugie gives the best definition here.
- this is true that light has properties of wave and matter.Then why doesn't it exerts pressure?Light can exert pressure though not much. The pressure exerted by electromagnetic radiation is called *Radiation Pressure*. http://en.wikipedia.org...
- because sound is made by a vibration and because atoms always vibrate, do they make even the tiniest...yes they make the tiniest amount of sound,according to the no of vibrations,called hertz,the sound is inaudible below 20hz
- what kind of waves are used in our microwavesIn microwaves, electromagnetic waves are used to heat up your food. The waves in your microwave are the same sort of waves that make up visible light.
- What happens to the wave if it is travelling through different mediums? Example: From a medium of hi...Great question! Unfortunately, the answer is kind of complicated. In general, if you keep EVERYTHING ELSE the same, the speed of sound in a gas (li...
- At 7:22 when the "speaker" pushed air forwards, how come the molecules of air went backwards?Some molecules which are pushed forward collide with the particles which are already present in the space forward. Because of these collisions they...
- Could anyone give a few examples each of transverse and longitudinal waves?Transverse waves: Electromagnetic waves(light waves, Radio waves),wave in a string etc. Longitudinal waves: compression waves in a spring, sound wa...
- because sound is made by a vibration and because atoms always vibrate, do they make even the tiniest...Yep! Even the most tiniest amount of sound is made by the vibration of atoms, just like any other.
26+ Free Frequency 4K & HD Stock Videos. Select a frequency video to download for free. HD & 4K video clips for your next project. heart ratefrequency. HD00:10.
- 10 sec
Refraction and frequency. Waves will refract when they travel from one material into another. Light travels in straight lines until it hits a prism, where it bends and spreads out into different colors. This bending, called refraction, happens when light moves from one transparent medium to another. Depending on the frequency of the wave, it ...
- 2 min
- Sal Khan
- I have a lot of questions, but I’d be happy is someone could just answer one! :) 1. When we say a pr...2. It means it hits an angle of the glass triangle.
- At 0:03 the video says that light can go through a vacuum. But why can light, and not any other type...Sound can't pass through vacuum beacause it needs air but there is no air vacuum so sound waves can't pass i hope you understood a little bit of so...
- when he said "vacuum" does he mean a vacuum or something eles like space?space is a vacuum because it has practically no atoms
- What is refractionRefraction is the redirection of a wave as it passes from one medium to another. It can be caused by the wave’s change in speed or by a change in t...
- Isn't the light traveling through a medium when it travels the prism? Light usually travels through ...Yes, light can travel through many mediums. We often talk about the speed of light through a vacuum because that speed is constant. In our everyday...
2,127 free Frequency videos and clips to download in 4K and HD. High quality Frequency stock video footage to use for free on your next personal or commercial project.
24+ Free Frequency 4K & HD Stock Videos. Select a frequency video to download for free. HD & 4K video clips for your next project. heart rate frequency. HD 00:10.
Created by Anita Sarkeesian, Feminist Frequency ran as an organization from 2009–2023, providing video commentaries exploring gender representations, myths, and messages in popular culture media ...
