Air Pressure Revisited: How Compressors Work

One of the machines that is useful to have in your home is the air compressor. It is a machine that is versatile and can be utilized in many ways. First and foremost is to power up your power tools such as drills, nail guns, spray guns, and other power tools that you will see in hardware stores. It is also useful for other home needs such as inflating the tire of your car, balls, and floats used in pools. There are also times that it can be used as blowers for dust in small computer components for example, and then some other cleaning tools for stones and bricks. 

Air compressors are not only used at homes. They can also be seen at gasoline stations. They are also well known for industrial uses. Factories use them for driving their machinery and tools. 

In addition to that, it is an efficient machine. Why? This machine uses an electric motor or gas engine to power a device. It sucks successive volumes of air from the atmosphere and compresses each volume of air in a confined space to increase its pressure by making the volume smaller. Remember your ideal gas law. It transfers the then high-pressure air to a receiver tank. This device uses the energy from combustion (gas enginers) or electric potential (electric motors) to compress air and store potential energy in the form of pressurized air.

There are three types of air compressor, and they are

  1. Reciprocating compressor – These types of compressors use a piston seated in a cylinder to squeeze the air. They increase the air pressure as the piston enters the cylinder, thereby reducing its volume. 
  2. Rotary Screw compressor – These types of compressors use a rotating spiral screw to gradually reduce the volume of the air and subsequently increase its pressure. It consists of dual rotating components enclosed within a confined volume that essentially pressure the air as they move. As a result, this design does not require valves. This design is oil cooled, and the oil also serves to seal the internals as well. This type of compressor is easy to use and easy to fix when thigns go wrong. Other advantages are a steady stream of air that is unlikely to dampen. Also, the design allows for a small overall product that puts out a ton of air and lasts for ages.
  3. Centrifugal compressor – The last type of compressor uses an impeller to essentially spin the air into a small, confined space to force it to compress. These are mostly designed for applications where a large volume of compressed air is called for.

What are the factors that make air compressors work and why is it important to know about them? The first factor the amount of power which is measured by the horsepower. The ones with larger horsepower are usually arranged for industrial use. The other is the rate delivering the volume of air which is measured by cubic feet per minute or cfm. The surrounding environment of heat, humidity and wind has an impact on it. Because of this, they use the standard cfm to determine cfm in combination with outside pressure and humidity. There is also another rating called displacement cfm. It is the product of cylinder displacement and motor rpm. It determines the efficiency of the compressor pump. These are important factors because they indicate which tools the compressor can drive and support.

Making Noises: How Guitar Strings Produce Sound

Imagine a world full of waves vibrating around you, all of them different sizes, shapes, and colors. Now close your eyes and focus on the sounds that you can hear. You can probably hear something mechanical, like an air conditioner, or your own breathing. Maybe you hear music, children laughing, cars driving past, or sirens in the distance. The world you imagined is around you already; it is the world of sound. Now let’s look at how this world is created.

All sound is made by movement. Rapid movement back and forth causes air to be pushed away. As the object moves back, the air does not fill in the space it was pushed from and a small vacuum is created, making a wave shape. These waves are sound.

If you take a rubber band and stretch it over your fingers, you can test the way that sound changes. Plucking a loose rubber band will produce a lower sound, while a rubber band that has been stretched tight will make a higher sound. Guitar strings work this way. The looser and thicker the string, the slower it can vibrate. These slow vibrations make the low sounds like a bass guitar. A tighter, thinner string cannot move has far as it vibrates. Its vibrations are tight and fast. This makes higher notes. On a guitar, the length of the strings can be changed by the player’s fingers. A shorter string vibrates more quickly than a longer one, causing a higher sound.

Since sound waves are literally caused by compressed air, it is easy for loud noises, the really strong waves, to damage hearing because of the increased pressure. In fact, sound waves can also be called pressure waves.

People who go to concerts might notice a pressurized feeling in their heads if they pay attention. How does the sound get that loud? An electric guitar by itself, not hooked up to speakers, is pretty soft. Now we are talking resonance and amplification.

An acoustic guitar is bulkier, right? It has a hole right under the strings where they are plucked. The air inside the acoustic guitar captures the sound and the wood at the back reflects the waves back stronger. This use of empty space and a sound reflector is called resonance. The sinuses in the human head do the same thing. The empty sinus space and the bones of the skull resonate our voices to make them louder.

The design that is common in most electric guitars is that of a solid body: no extra space. That is why an electric guitar sounds soft all on its own; it has no resonance. That is where the speakers come in to play. The vibrations of the strings on an electric guitar are picked up in the solid body of the guitar and passed electrically to speakers. These speakers mimic the guitar’s sound waves while making the waves bigger and stronger and, therefore, louder. The increase of the strength of a sound wave is called amplification.

Vocal chords vibrate like guitar strings. Clapping hands together creates a single sound wave. Go explore the world of sound!

How Does a Paintball Gun Work, Anyway?

The parts of paintball guns are similar but have some very important differences between them. First, it’s important whether you’re using a pistol, semi-automatic paintball gun and the pump-action gun. All of them work differently but have the same core parts that make them paintball guns. Some can be pump action paint ball guns. The CO2 cartridge will often be loaded into the bottom tube, right below the barrel. In hand paintball guns, your paint balls are loaded into the top tube. The middle tube are where the shots are fired. Pumping the gun will load one round at a time.

The other pump action paintball gun will require a CO2 cartridge or a compressed air cartridge. The people competing have to be responsible enough to carry a paintball tube. That tube is going to be your main source for ammunition. Your paintball rounds go into a holder called a hopper. This item makes it immediately clear that it’s a paintball gun. It’s the most immediate sign to tell people that the weapon isn’t lethal to other competitors.

Hoppers have numbers on them to let people know have many rounds can be held. However, some times this can vary depending on the shape of the rounds that you have. They will drop into the chamber of the gun. Pump action guns are loaded into the barrel itself and then requires to be pumped after every shot. It’s important to see how little recoil that the paintball guns have. Some of that can be explained because they use CO2 cartridges to propel the rounds. The rounds themselves also tend to be lighter and easier to control.

Semi-automatic guns are more convenient than the other choices. There are options for either electric or mechanical paintball guns. They are the most basic paintball gun and almost everyone can have an enjoyable experience with them. Every time you pull the trigger a round will be fired. That is different from the pump action guns that require you to have pump each round. That makes sure that the concept doesn’t require much explanation to everyone. That also means that the semi-automatic gun can hold more rounds than the pump action gun. That makes sure that newcomers are punished as hard for their lack of gun knowledge.

Paintball guns can be enjoyed by people that don’t enjoy real guns. They also have a far less chance of injuring someone who is less experienced with a guns. Chest soreness or literally being hit with recoil due to inexperience is relatively nonexistent when it comes to paintball guns.

What’s The Chemistry behind Wood Burning?

Any chemical reaction between fuel and oxygen ignites together and becomes fire. For example, wood and gasoline. However, these two products don’t produce flame on its own because both are surrounded by oxygen. To have a good combustion, it needs high levels of fuel to generate heat and makes one set of fire.


Keep in mind that heat comes from different sorts of things. Wood burning can produce heat from friction, lightning, match, focused light or something that’s been burning. If the wood is heated over 300 degrees Fahrenheit, this starts to decompose heat and those types of materials that are made out of cellulose.

There are some materials released that are made out of volatile gases, and it is called as smoke. The production of smoke is a compound of carbon, hydrogen, and oxygen. Moreover, its other materials are formed into as “char” that is nearly of ash or pure carbon. The wood does also contain materials that can’t be burned such as potassium and calcium. The “char” is known as charcoal which is also made of wood that’s been heated and removed nearly forming into volatile gases thus it leaves behind so much carbon. This is why you see charcoal fire doesn’t produce so much smoke.

Wood burning happens in two different reactions.


1. The volatile gases are too hot which is about 500 degrees Fahrenheit. The compound molecules are broken apart, and then the atoms are recombined to the oxygen to form products such as water and carbon dioxide. Meaning to say, it burns.

2. The char do also combine with oxygen but in a much slower type of reaction. This is why most of the charcoal during barbecue time can stay hot for a longer period.

Side effect


During a chemical reaction, there is a lot of heat which leads to the production of fire. Many fuels usually burn in just one step. For example, is the use of gasoline. As the heat vaporizes, this is the time that it burns as a volatile gas. Over the time, humans can produce and control fire.

Fire reacting to properties likes the ignitability, flame spread and heat release is the most relevant factor that could ever happen for the wood to perform fire. Charring can influence the characteristics of the property especially if the layers are protected.

Bottom line

To make a good production of wood burning, it needs enough to the higher temperature of heat for the wood to start burning. What it also depends on the way heat is produced. If the thermal properties are too damp or too low, the probability of heat is fifty-fifty. So, ensure that the materials are made of suitable materials to produce heat. This will surely come in handy in days where you might be out camping, and wood burning is all you need to keep you warm and able to cook your food.