Which would cause a mechanical wave to move slower?

Wave speed depends on the type of medium. Mechanical waves- travel faster in solids & slowest in gases 2.

What Sound travels the fastest?

Solids: Sound travels fastest through solids. This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel more quickly through it. In fact, sound waves travel over 17 times faster through steel than through air.

Does sound waves never die?

The godfather of radio technology decided that no sound ever dies. It just decays beyond the point that we can detect it with our ears.

Can sounds be stopped?

The three easiest ways to stop sound are to turn off the source, increase your distance from it (walk out of that noisy bar), or stop the sound waves from entering your ears (cover your ears or wear earplugs at the rock concert).

Does all sound end up as heat?

Yes, sound waves can generate heat. In fact, sound waves almost always generate a little bit of heat as they travel and almost always end up as heat when they are absorbed. Sound and heat are both macroscopic descriptions of the movement of atoms and molecules.

How loud can I yell?

Loud appliances such as a vacuum cleaner or power tools could exceed 80 dB. Human screams can be quite loud, possibly exceeding 100 dB (as of March 2019, the world record is 129 dB!) —but you probably want to avoid that because screams that loud can hurt your ears!

What travels faster a yell or a whisper?

That is, a holler will travel through air at a faster speed than a whisper. But don’t be fooled! The speed at which sound waves travel through air is dependent upon the properties of the air – mainly the temperature. Only by altering the properties of a medium can the speed of sound be altered.

Does radiation require gas?

Unlike conduction and convection, heat transfer by thermal radiation does not necessarily need a material medium for the energy transfer. In the case of thermal radiation from a solid surface, the medium through which the radiation passes could be vacuum, gas, or liquid.