Register to reply

Vector and Scalar quantities

by Rawr
Tags: quantities, scalar, vector
Share this thread:
Rawr
#1
Feb19-07, 11:54 PM
P: 15
No, I am not going to ask you what the difference between those two are. =P

I know the differences, but at the beginning of this term, my class started to learn about electricity and magnets, and that stuff.

Now, vector quantities are those that have direction and scalars are those without directions.

But then my teacher says... to put a +/- in front of an answer if it is a scalar quantity and to not put anything in front of an answer if it is a vector quantity.

What the heck? That really threw me off.

Could someone clarify on why we need to do that please? @_@
Phys.Org News Partner Science news on Phys.org
NASA team lays plans to observe new worlds
IHEP in China has ambitions for Higgs factory
Spinach could lead to alternative energy more powerful than Popeye
neutrino
#2
Feb20-07, 01:38 AM
P: 2,047
put a +/- in front of an answer if it is a scalar quantity and to not put anything in front of an answer if it is a vector quantity.
Can you put that into context?
chaoseverlasting
#3
Feb20-07, 09:42 AM
P: 1,017
I think your teacher means to leave the answer as is to indicate the direction of the field. Or to know what the direction is and to use the magnitude for the calculations.

Kelechi
#4
Apr12-09, 03:56 AM
P: 1
Vector and Scalar quantities

What are the difference between scalar and a vector quantity
LowlyPion
#5
Apr12-09, 10:58 AM
HW Helper
P: 5,343
Quote Quote by Kelechi View Post
What are the difference between scalar and a vector quantity
Maybe this will help?
http://hyperphysics.phy-astr.gsu.edu/hbase/vbas.html#c1
keiem
#6
Aug15-10, 04:24 PM
P: 1
your teacher put plus and minus sign to indicate directions....
if you going to put it in the cartesian plane it will have the positive and negative value of "x" or "y".
Gyro
#7
Aug15-10, 04:43 PM
P: 49
If a vector is defined by magnitude and direction, +ve is defined as in the same direction as the vector arrow points. What does putting a - in front do?
Well, in what direction would do you say a car is moving if it is travelling at a velocity of -5 m/s to the right?


Register to reply

Related Discussions
Scalar or vector? Differential Geometry 5
Scalar and vector quantities? Introductory Physics Homework 2
Finding cooridinates of a charge from vector quantities Introductory Physics Homework 1
Scalar or vector? Precalculus Mathematics Homework 2
Vector Addition of differing quantities Introductory Physics Homework 1