blog by chris mathews

today we had chemistry class and i was assigned the blog...

we started chapter 11 YAY!!!

ch 11

the pressure formula is p=f/a such that p-pressure, f=force, and a is area

always remember that area is squared

the SI unit for area is N which means newton. it will increase the speed of one kilogram mass by one meter per second that that force is applied.

pressure is a force per unit area, therefore pressure of a 500 N on a floor with an Area of 325 cm^2 is:

500 n / 325 cm^2 = 1.5 N/Cm^2

*the greater the force -> greater pressure

*smaller the area-> greater pressure KNOW THOSE TWO THINGS

introduced by Evangelista Toricelli who was constantly picked on by his parents, the ultimate teaser being his girlish name....

water pumps can raise about 34 feet

thought that it must be dependent on weight and weight of air

reasoned that since mercury was 14 times less dense than water, it would be 1/14 of 34 feet

tested it and it in rose 30 in.

pressures can be also measured in units of atmospheres. Because the average pressure is 760 mm of Hg or one torr named after evangelista.

In pascals pressure is exerted by one N on one square meter

Daltons law

the measure of full pressure in a gas is the sum of the measure of partial pressures

AND THATS THE BLOG