Exam Formulas Flashcards
1
Q
I
A
Current
2
Q
V
A
Voltage
3
Q
R
A
Resistance
4
Q
How to calculate voltage
A
V = I x R
5
Q
How to calculate power
A
P = V x I
6
Q
p
A
power/watts
7
Q
E
A
Energy
8
Q
t
A
Time(seconds?)
9
Q
W -> kW
A
/1000
10
Q
kW -> W
A
x 1000
11
Q
1W(joules)
A
1J/s
12
Q
J/s
A
Joule per second
13
Q
How to calculate energy
A
E = PxT
E = kW * h
14
Q
Energy in and out?
A
Ein > Eout
15
Q
Cost of Electricity
A
kWh * $/kWh(cost)
16
Q
Carbon
A
CO^2
17
Q
Photosynthesis
A
6CO2 + 6H2O –(light)–> C6H12O6 + 6O2
18
Q
Water
A
H^2O
19
Q
Sugar/Glucose
A
C^6H^12O^6
20
Q
Oxygen
A
O^2
21
Q
Cellular Respiration
A
Sugar + oxygen (O2) –(enzymes)–> carbon dioxide (CO2) + water (H2O)
22
Q
Nitrogen Gas
A
N^2
23
Q
Nitrates
A
NO^3
24
Q
Ammonia
A
NH^3
25
Nitrites
NO^2
26
Making Nitrates with Lightning
Nitrogen gas(N2) + Oxygen(O2) --(lightning)--> Nitrates(NO3) → Soil → Plants → Animals
27
Making Nitrates with Nitrogen Fixing Bacteria
Wastes → Ammonia(NH3) + Nitrogen-fixing Bacteria → Nitrates(NO3)
28
Denitrifying nitrates to nitrogen gas
Denitrifying bacteria + Nitrates(NO3) → Nitrites(NO2) → Nitrogen gas(N2) → Atmosphere
