Physical Quantities Flashcards
What is the prefix of the symbol T?
Tera
What is the prefix of the symbol G?
Giga
What is the prefix of the symbol M?
Mega
What is the prefix of the symbol k?
Kilo
What is the prefix of the symbol m?
Milli
What is the prefix of the symbol µ?
Micro
What is the prefix of the symbol n?
Nano
What is the prefix of the symbol p?
Pico
What is the prefix of the symbol f?
Femto
What is the prefix of the symbol c?
Centi
What is the multiplier of the symbol T?
10^12
What is the multiplier of the symbol G?
10^9
What is the multiplier of the symbol of M?
10^6
What is the multiplier of the symbol k?
10^3
What is the multiplier of the symbol c?
10^-2
What is the multiplier of the symbol m?
10^-3
What is the multiplier of the symbol µ?
10^-6
What is the multiplier of the symbol n?
10^-9
What is the multiplier of the symbol p?
10^-12
What is the multiplier of the symbol f?
10^-15
How is a number expressed as in standard form?
A x 10^n (A is a number between 1 and 10; n is the No. of places the decimal point must move)
In standard form, if you are dividing the number by ten, what must you do with “x10^n”?
Multiply it by ten
What are the seven base quantities?
1- Length
2- Mass
3- Time
4- Electric current
5- Temperature
6- Luminous intensity
7- Amount of substance
What are the seven SI units?
1- Metre
2- Kilogram
3- Second
4- Ampere
5- Kelvin
6- Candela
7- Mole
What are the seven base symbols?
1- m
2- kg
3- s
4- A
5- K
6- cd
7- mol
What is a derived unit?
A unit consisting of two or more SI base units
What is velocity in base units?
m/s = ms^-1
How do you express joules in base units?
ke = 1/2 x m x v^2
= kg x (ms^-1)^2
=kgms^-2
How do you express newtons in base units?
Fr = ma
Fr= kg x ms^-2
F= kgms^-2
How do you express momentum in base units?
p=mv
p= kg x ms^-1
p= kgms^-1
How do you express moments in base units?
M= fd
M= kgms^-2 x m
M= kgm^2s^-2
How do you express watts in base units?
P= E/t = ke/t
P= 0.5mv^2 / t
P= kg x (ms^-1)^2 / s
P= kgm^2s^-2 /s
P= kgm^2s^-3
How do you express ohms in base units?
P=I^2 x R
R= P/I^2
R=W/A^2
R=kgm^2s^-3 / A2
R= kgm^2s^-3A^-2
How do you express charge in base units?
Q = It
Q= A x s
Q= As
How do you express Hertz in base units?
F=1/T
F= 1/s
F= s^-1
How do you express pressure in base units?
P= F/A
P= N/A
P= kgms^-2 / m^2
P= kgm^-1s^-2
How do you express volts in base units?
P =IV
V= P/I
V= W/A
V= kgm^2s^-3 / A
V= kgm^2s^-3A^-1
