pressure in everyday life

This is just a topic so i can fill up my blog.(JOKING)
Did you know that when you are showering pressure is involved?
Did you know when you are typing your blog you are applying pressure?
Did you know that when your head is supported by your hand while daydreaming you're applying pressure?
Well ,pressure is around you more than you know it.
In the shower head ,there is a valve where you can control the amount of water flowing through.The higher the pressure the harder it would beat down against your skin.
While you are typing your finger is applying pressure unto the keys ,thus it would send information to the computer and display the words you are typing .
When your head is upon your hand ,you are putting pressure on the hand ,the pressure from the hand would then be transferred to the elbow while it is resting in the table.Well, you cannot do this for too long as your hand will get numb due to lack of blood circulation and the teacher will catch sooner or later

Pressurization in aircraft cabins

HI this is just a link about the pressurization in aircraftshttp://en.wikipedia.org/wiki/Cabin_pressurization

Harmful pressure

Though stiletto heels may make you look glamourous and tall there are hidden harms of it .It may cause you your foot,back and even toes.

                                                     These seemingly harmless shoes are actually harmful.

These small stud like heels have a very small surface area on the bottom causing the weight of one to be all supported by that puny stick.These shoes are not meant for walking but for looks only ,however many wear it for the sake of vanity.

As you walk, your unusually highly elevated foot will start to feel uncomfortable.Most ignore it but they are going to regret it once they are feeling back pains .because of the preesure forced on the foot it would slwy start to affect the spine causing to curve slowly.Though most do not feel it at first ,the eventual result would be horrifying.

Stiletto heels are to make you taller but if you wear if for a very long time,you're curved back would make you shorter.!

Due to the small sharp edges of most stiletto heels, your toes would be compressed inside. As the toenail grows,the toe nail would mould to the shape of the edge,causing toe nail to cut into the skin of your toe .This would hurt no matter where you walk.Obviously ,the disadvantages outweigh the advantages.

DON'T WEAR STILETTOS! 

Renewable energy

There many forms of renewable energy such as wind energy and solar energy

Here are the link to the video

http://www.youtube.com/watch?v=oIU5fFmDeSc

The energy that we are mainly consuming is non-renewable energy , though these ways we are using them may be convenient for us but itis harming us the most,

Pressure video mythbusters

http://www.youtube.com/watch?v=JmJoyuUJj2Q
This is a video on how deadly pressure can be.the pressure in the water heater was so great that the remaining part of the rocketed into the sky.Pressure has many factors, in this case HEAT.

Static & Dynamic Equlibrium

http://www.rwc.uc.edu/koehler/biophys/2h.html--- Static Equilibirum
http://dl.clackamas.edu/ch105-03/dynamic.htm--- Dynamic Equilibrium

Force and moments

The turning effect to accomplish a task is called the moment of a force.
The principle of moments state :When a body is in equilibrium, the sum of clockwise moments about the pivot is equal to the sum of anticlockwise momenra about the same pivot.
To calculate the moment of a force : M=F x D(perpendicular distance from the pivot to the line of action of the force.)
Note : work done is calculated by :F x Parallel distance
The S.I. unit of moments is Nm(Newton metre)

In the picture on the above,to calculate the effort needed,take the weight of the load and mulitply it with the distance from the load to the pivot then divide it by the distance of the pivot to the effort

In this second class lever above ,multiply the distance from the load to the pivot with the weight of the load .Divide the result with the distance between the load and effort.

For the third class lever,mutlitply yhe weight of the load and the distance o the load to the effort.Then,use the result and divide it by the distance of the effort to the pivot.