What is basic need of si units, Chemistry

Assignment Help:

Q. What is basic need of SI Units?

Ans: The Importance of Units

Units give numbers a particular meaning. Example: I am 5 feet 10 inches tall. Feet and inches are units. I could have told you that I am five - ten. But you would only understand the information if you could figure out that I am talking about my height and that height is usually reported in the archaic English system of feet and inches. Sometimes you can get away without mentioning the units used to measure whatever you are talking about, science class is not one of those times.

2028_importance of unit.gif

Units can be most helpful when you are converting from one system of measurement to another like English to metric. If I want to convert 300 miles into kilometers,

If you look at each multiplier, you will notice that each is the same as an equation such as 1 mile = 5,280 feet, so each multiplier is the same as multiplying by 1. If you go down the equation and cancel units that appear in the numerator (top) and in the denominator (bottom) you start with 300 miles multiply by 1 five times and end up with kilometers. To find out how many kilometers there are in 300 miles, you have to do what each multiplier tells you to do. First, multiply 300 by 5,280, then multiply by 12, then multiply by 2.54, then divide by 100 and last divide by 1,000 to get 480 km.

Units can also help you catch errors when you write down and substitute numbers into equations. Be very suspicious that you may have forgotten something or inadvertently inverted something if you calculate the length of something and it comes out in sec/meter!


Related Discussions:- What is basic need of si units

A3p orbital has, A3p  orbital has: (1) Two spherical nodes (2) Two ...

A3p  orbital has: (1) Two spherical nodes (2) Two non-spherical nodes (3) One spherical and one non-spherical nodes   (4)One spherical and two non-spherical nodes A

Conductometery, conductometric determination of hydrolysis constant of conj...

conductometric determination of hydrolysis constant of conjugate base of weak acid experiment?

Organometallic compounds, Organometallic compounds Organic compounds wh...

Organometallic compounds Organic compounds where a metal molecule is directly associated to carbon or organic compounds which consist of at least one carbon-metal bond are know

Basic concept, difference between atom,element,compound,molecule,ion,charge...

difference between atom,element,compound,molecule,ion,charge

In organic, why 4f electrons do not take part in bonding?

why 4f electrons do not take part in bonding?

Determine the overall efficiency, A one serving bag of Granny Goose Hawaiia...

A one serving bag of Granny Goose Hawaiian Style Potato Chips has 70 Cal. Considering that all of the energy from eating these chips goes toward keeping your heart beating, how lon

S-block elements, #question.reactions of s-block element?.

#question.reactions of s-block element?.

Example on law of conservation of mass, Q. Example on Law of Conservation o...

Q. Example on Law of Conservation of Mass? A slim strip of iron with a mass of 15.72 g is placed in to a solution containing 21.12 g of copper and copper (II) sulphate begins t

Discovery of sub-atomic particles , DISCOVERY OF SUB-ATOMIC PARTICLES T...

DISCOVERY OF SUB-ATOMIC PARTICLES The atomic theory of the Greek philosophers, Leucippus and Democretus (400 B.C.) held that continued subdivision of matter would ultimately yi

Electron pair bonds-lewis and valence structures, A single covalent bond is...

A single covalent bond is build when two atoms share a pair of electrons. Triple and double bonds can be formed when two or three such pairs are shared. A Lewis structure is a repr

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd