Exam Formulas

Question 1

I

Answer 1

Current

Question 2

V

Answer 2

Voltage

Question 3

R

Answer 3

Resistance

Question 4

How to calculate voltage

Answer 4

V = I x R

Question 5

How to calculate power

Answer 5

P = V x I

Question 6

p

Answer 6

power/watts

Question 7

E

Answer 7

Energy

Question 8

t

Answer 8

Time(seconds?)

Question 9

W -> kW

Answer 9

/1000

Question 10

kW -> W

Answer 10

x 1000

Question 11

1W(joules)

Answer 11

1J/s

Question 12

J/s

Answer 12

Joule per second

Question 13

How to calculate energy

Answer 13

E = PxT
E = kW * h

Question 14

Energy in and out?

Answer 14

Ein > Eout

Question 15

Cost of Electricity

Answer 15

kWh * $/kWh(cost)

Question 16

Carbon

Answer 16

CO^2

Question 17

Photosynthesis

Answer 17

6CO2 + 6H2O –(light)–> C6H12O6 + 6O2

Question 18

Water

Answer 18

H^2O

Question 19

Sugar/Glucose

Answer 19

C^6H^12O^6

Question 20

Oxygen

Answer 20

O^2

Question 21

Cellular Respiration

Answer 21

Sugar + oxygen (O2) –(enzymes)–> carbon dioxide (CO2) + water (H2O)

Question 22

Nitrogen Gas

Answer 22

N^2

Question 23

Nitrates

Answer 23

NO^3

Question 24

Ammonia

Answer 24

NH^3

Question 25

Nitrites

Answer 25

NO^2

Question 26

Making Nitrates with Lightning

Answer 26

Nitrogen gas(N2) + Oxygen(O2) –(lightning)–> Nitrates(NO3) → Soil → Plants → Animals

Question 27

Making Nitrates with Nitrogen Fixing Bacteria

Answer 27

Wastes → Ammonia(NH3) + Nitrogen-fixing Bacteria → Nitrates(NO3)

Question 28

Denitrifying nitrates to nitrogen gas

Answer 28

Denitrifying bacteria + Nitrates(NO3) → Nitrites(NO2) → Nitrogen gas(N2) → Atmosphere