AS key facts

?
  • Created by: dan
  • Created on: 03-03-14 21:37
What is a Scalar quantity?
One that has a Magnatude but no direction
1 of 24
What is a Vector quantity?
Once that has magnitude and direction
2 of 24
What is Acceleration?
Rate of change of verlocity
3 of 24
What is a Newton?
It is a force that causes a mass of one kilogram to have an acceleration of one metre per second every second
4 of 24
What is a couple?
It is a pair of equal and parallel but opposite, which tend to produce a rotation only
5 of 24
What is a moment?
It is the force multiplied by the perpendicular distance
6 of 24
What is Density?
Mass per unit volume
7 of 24
What is pressure?
Force per unit area
8 of 24
What is what is one Joule?
the work done when a force of one newton moves its point of application one metre
9 of 24
What is a watt?
One joule per second
10 of 24
What is stress?
The force per unit cross-section
11 of 24
What is strain?
Extension per unit length
12 of 24
What is Charge?
Current x Time
13 of 24
What is a coulomb?
total charge supplied by a current of one amp in one second
14 of 24
What is Kirchhoff's first law?
The sum of the current entering any junction is always equal to the currant leaving a junction.
15 of 24
What is Electromotive force (E.M.F)?
the energy transferred per unit charge when one other type of energy is converted into electrical energy
16 of 24
What is potential differance?
the electrical energy transferred per unit charge when electrical energy is converted into another form of energy
17 of 24
What is Ohm's law?
the current through a conductor is proportional to the potential difference across it provided conditions remain constant
18 of 24
How to find the resistivity of a wire
Resistance x cross-sectional area / length of wire
19 of 24
what is a kilowatt-houre (kWh)?
it is 1000 watts for 3600 seconds so therefore 3600000J
20 of 24
What is a node?
it is a point in a stationary wave at which there is no displacement of the particals at any time
21 of 24
What is an antinode?
the displacement of the particles in a stationary wave varies by the maximum amount
22 of 24
What is an electronvolt?
it is the energy an electron, with charge -1.6x10^-19C, acquires when it rises through a potential differance of one volt
23 of 24
What is the threshold frequency?
it is the lowest frequency of radiation that will result in the emission of electrons from a particular metal surface
24 of 24

Other cards in this set

Card 2

Front

What is a Vector quantity?

Back

Once that has magnitude and direction

Card 3

Front

What is Acceleration?

Back

Preview of the front of card 3

Card 4

Front

What is a Newton?

Back

Preview of the front of card 4

Card 5

Front

What is a couple?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Physics resources:

See all Physics resources »See all ALL resources »