Physical Quantities (1) Flashcards
1
Q
Basic Units
A
metre (m) - length second (s) - time kilogram (kg) - mass kelvin (K) - temperature ampere (A) - current
(make sure all numbers are in these units before using equations)
2
Q
Derived Units
A
made by combining basic units
3
Q
frequency
A
hertz (Hz)
/s
s^-1
4
Q
force
A
newton (N)
kg(m/s²)
kg m/s²
5
Q
pressure
A
pascal (Pa)
N/m²
kg/m/s²
6
Q
energy/work
A
joules (J)
Nm
kg m²/s²
7
Q
power
A
watt (w)
J/s
kg m² s^-3
8
Q
electric charge
A
coulomb (C)
As
As
9
Q
electric potential
A
volt (V)
W/A
kg m² s^-3 A^-1
10
Q
electric capacitance
A
farad (F)
C/V
kg^-1 m^-2 s^4 A²
11
Q
electric resistance
A
ohm ( Ω)
V/A
12
Q
magnetic flux
A
weber (Wb)
Vs
13
Q
magnetic flux density
A
tesla (T)
Wb/m²
14
Q
inductance
A
henry (H)
Wb/A
15
Q
temperature
A
degree Celsius (°C)
K - 273.15
K
16
Q
plane angle
A
radian (rad)
17
Q
activity
A
becquerel (Bq)
/s
s^-1
18
Q
tera- (T)
A
10 ^ 12
19
Q
giga- (G)
A
10 ^ 9
20
Q
mega- (M)
A
10 ^ 6
21
Q
kilo- (k)
A
10 ^ 3
22
Q
centi- (c)
A
10 ^ -2
23
Q
milli (m)
A
10 ^ -3
24
Q
micro- (μ)
A
10 ^ -6
25
nano- (n)
10 ^ -9
26
pico- (p)
10 ^ -12
27
micrometer
measures diameter
accurate to 0.01mm
(tighten ratchet till it clicks, record zero error, add/subtract from final measurement)
28
zero error
the amount you need to add or subtract to make your starting point zero
(due to wear and tear instruments need to be zeroed}
29
vernier callipers
diameter
| accurate to 0.2mm
30
vernier scales
- measure angles in spectrometer
| - use secondary scale to measure line that lines up best
