What kind of matter cannot be seen or felt?

Answer 1

You can't sense most electromagnetic energy (EM). You can see optical light (light in the visible spectrum), because light is EM radiation. Additionally, you feel thermal radiation (in the infrared or IR range) on your skin, and it (your skin) will react to ultraviolet radiation (UV) in much the same manner and you'll feel it, too. But radio waves, energies below visible light and IR, and energies above optical light and UV, the X-rays and gamma rays, are likewise not sensed. Chemical and electrical energy can be sensed in some cases, and their effects detected with the senses, depending on the situation. The smallest chemical reactions or tiny electrical currents or low voltages cannot be sensed, but there is a threshold that is often crossed and we notice what is going on. But there is a type of energy that can't be detected directly. There are several types of nuclear radiation, both particulate and the electromagnetic gamma ray radiation, and you cannot sense any of it. You can receive a fatal dose of radiation of any one kind or any combination of them, and never know what happened until your symptoms develop (usually in a few hours). Within 30 days, radiation sickness can prove fatal with the exposed individual never seeing, hearing or feeling anything at the time of exposure. EXTRA INFO: Radiation (electromagnetic, alpha or beta) is not strictly speaking energy as such - it is a method of transporting energy. An EM wave HAS energy, but it is not actually energy itself. Energy is a property, it is a measure of the available work which can be extracted, not something you can actually pick up and hold. Basically there are 2 forms of energy, kinetic and potential (both relativistic across the universe - we normally measure each using the earth's surface as a datum i.e. a stationary particle at sea level has zero energy). So energy is not something one can feel, in the same way you cannot touch or hear height for example. Touching or hearing or seeing are all ways in which the body detects a CHANGE in energy at its boundary with the world (the retina, skin, eardrum) - but energy itself is an abstract concept.

Answer 2

Atoms

Elements (some, the gasous kind. )

Air

Microscopic bacteria (germs)

Sub-atomic particles

Dustmites...

List goes on.

Everything has matter. :)

Answer 3

I had same question. As I understand it so far matter consists of particles categorized as fermions like (photons, electrons), which have a half integer spin. While light (which bounces of matter so we can see the object) are energy carrying particles with integer spin, and are classified as a boson. I guess this means that they are spinning at different rates or directions, so when they come into contact they bounce off each other. As where if you had two lights crossing each other at a right angle, go right through each other because they are made up of the same rotating particles. So to sum up, as far I understand it, fermoins are essential building blocks of matter, so if it's matter it should bounce off light which would make it visible. Even air, although not visible horizontally, still reflects the blue sky we see every day and you can feel it on your skin so you know it's physical(matter). Hope that helps a little. I'm still trying to understand this myself.

Answer 4

cells,atoms, electrons, nuerons, protons, ultra-violet light, and infered lights

Answer 5

heat

__

Heat is not matter, it's energy.

Many gases cannot be seen.

Answer 6

Yes, matter can be something that you can not see. This is because one form of matter is gas, which can not be seen.

Answer 7

Air.

Answer 8

atomic

Answer 9

Gases.

Answer 10

energy