hhaq170
Badges: 0
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#1
Report Thread starter 6 years ago
#1
What is the purpose of SI units?
Thanks in advance for any answers
0
reply
me2*
Badges: 13
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#2
Report 6 years ago
#2
(Original post by hhaq170)
what is the purpose of si units?
Thanks in advance for any answers
s-i ( international system of units)

combines metric system and (mks) (cgs) systems to create a single composite system of units

read carefully:

Physics is all about physical quantities in other words quantities that can be measured or determined numerically

there are many types:
1.scalars
2.vectors
3.base quantities
4. Derived quantities
etc...(these should be more than enough for a-levels)

you probably know scalars and vectors

base quantities are expressed in terms of base units
1.metre
2.kilogram
3.second
4.ampere
5.kelvin
6.candela
7.mol

and dervied quantities (such as speed , current, acceleration etc..)

are expressed as combinations of base units
example
speed=distance/time=metre/sec>> this contains two base units so its a derived physical quantity


get the idea?? Rep if you get it!
0
reply
hhaq170
Badges: 0
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#3
Report Thread starter 6 years ago
#3
Thanks a lot. I get it now.
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

Has advance information helped during your exams?

Yes (67)
65.69%
No (26)
25.49%
I didn't use it to prepare (9)
8.82%

Watched Threads

View All