Be
Prepared to share your information with the class and discuss your results.
CONTENT 40
Mechanical
Energy 10
Personal
Energy 5
Food 5
Electrical 5
Heat 5
Transportation 5
Shower 5
OVERALL
CONCLUSIONS 30
Each
Section 7
Overall 7
Class
Comparison 7
QUALITY 17
Organization 6
Accuracy 6
Clarity 4
INSIGHT 12
Analysis 4
Class
Discussion 4
Implications 4
SOME
SAMPLE SECTIONS (way shorter than your project):
MECHANICAL
ENERGY:
1) I
move up the stairs 5 times a day. My mass is 20 kg, and the stairs are 10 m
high.
So my
gravitational potential energy for a week is mgh * 5times * 5 days. (I don’t
move on weekends!)
20
kg (9.8)*10m=1960 Joules * 5=9800 Joules* 5 days
GPE=
49, 000 Joules per week
I
walk up and down the hallway 20 times a day, and it is 50 m long. Over a
typical day, I walk another 100 m total (see my chart for list of walking).
Then I walk another 200 m on the weekend.
So
that means I walk about 1400 m total in a week. That’s over 2 hrs a day*60*60=
7200 sec
So
my average velocity is 1400/7200 = .2 m/s in a week for my average velocity.
My
kinetic energy is ½ m v^{2} = .5 (20) (.2)^{2} = 0.4 Joules!
The work
I do to move myself is my Weight*Distance= 196 N* 1400 = 280, 000 Joules
My
total mechanical energy is GPE + KE (I won’t bother counting my elastic
potential energy because I am not a spring!!!) ME= 49000 + .4 + 280,000 =
330,000 Joules (about)
2) I
now compare to my activities list I got from countmycalories.com….
I
list out my sleeping (50 Cal/hr) * 10 hrs/day*7 days= 3500 Cal
My
running/walking 120 Cal/hr * 10 hrs/week = 12000 Cal
My
using a rotary saw is 100 Cal/hrs * 2 hrs/week = 200 Cal
My
other activities add up to 11, 000 Cal a week…..
So
my total for a week is 27, 000 Cal for the week….
27,
000 Cal * 4187 Joules/Cal = 100, 000, 000 Joules a week…..
I
guess the mechanical energy way one doesn’t account for all the stuff I do!!!
3) My food intake a day is ham egg and
cheese sandwich: 300 Calories,
salad :
400 Cal
pizza :1300
Cal
other :
1000 Cal
So
that’s 3000 Cal a day, or 21, 000 Cal a week*4187= 80, 000, 000 Joules… I
should be losing weight!

ELECTRICAL:
1)
My bill for the month is $40, and is about 600 KWHrs a week.
2)
When I read my electric meter it is 1249180 on Monday and 124900 the next week,
so I used 720 KWHrs that week…
3)
I add up all my devices,
I
have 5 100 Watt light bulbs I use for 5 hrs each a week.
0.1
KW * 5 hrs = .5 KW Hrs * 5 = 2.5 KW Hrs a week
I
have a 500 Watt TV I use for 4 hrs a day
0.5
KW * 4 * 7 = 14 KW Hrs a week
I
have a 1100 Watt fridge I use for 168 hrs a week
1.1
* 168 = 200 KW Hrs…
So
my total adds up to be about 350 KW Hrs a week, I must have forgot some stuff…,
900 million Joules!

My
Shower:
My
showerhead says 10 gal/min, and I take a 10 min shower, so I use 100 gallons.
I
also held a cup under the faucet for 10 seconds, and got 1.5 gallons ( 8
gal/min)
I
convert that to kg ( gal to L to Kg) and get that I use 380 Kg of water in a
shower.
It
gets lifted up from my basement for 10 m, so the work is mgh=380*9.8*10=36, 000
Joules
To
Heat the water it goes from 2 degrees Celsius to 32 degrees Celsius (cold to
hot)
30
degrees change….
So
the Calories used is 380 Kg * 30 degrees= 10, 000 Calories = 41, 870,000 Joules
to heat it!
so
my energy for a shower is 41,900,000 Joules!

My
Heat:
I
get my oil heat bill and figure it uses 40 gallons of oil a month, and convert
it to Joules.
60
billion Joules!

My
Car:
I
travel 30 miles a day, and my car gets 20 mpg, so I use 1.2 gal a day times 7
days for 10 gallons of gas a week, and I convert that to Joules…
1.5
billion Joules

I add
up my Mech Energy plus Electrical plus Heat plus Car plus other and get
About
63 billion Joules total! = 15 million Calories, 35, 000 Jelly DoughnutS!
UNIT CONVERSIONS FOR ENERGY

WANT→ 


Joules 
kilocalories(food
Calories) 

KNOW↓ 



J 

Calories 
1
Joules 
J(Nm) 
= 
1 
J 
0.000238834 
Calories 
1kilocalories(food
Calories) 
Calories 
= 
4187 
J 
1 
Calories 
1
British Thermal Units 
BTU 
= 
1055 
J 
0.251996 
Calories 
1
KilowattHours 
KWHr 
= 
3599406 
J 
861 
Calories 
1
FootPounds 
ftlbs 
= 
1.356 
J 
0.000324048 
Calories 
1
FuelOilGallons 
= 
154449647 
J 
36889 
Calories 

1
GasolineGallons 
= 
134659880 
J 
32168 
Calories 

1
Coal kilograms 
= 
20992945 
J 
5021 
Calories 

1
Ergs 

= 
9.99835E08 
J 
2.38846E11 
Calories 
1
Grams of Fat 

= 
39776 
J 
9.5 
Calories 
1
Jelly Doughnut 
= 
1046750 
J 
250 
Calories 

1
full cord wood 
= 
21101120 
J 
5040 
Calories 

1
cu ft nat gas 
= 
1076157 
J 
257 
Calories 


WANT→ 





KNOW↓ 



FuelOilGallons 

GasolineGallons 
1
Joules 
J(Nm) 
= 
6.4746E09 
FuelOilGallons 
7.42608E09 
GasolineGallons 
1kilocalories(food
Calories) 
Calories 
= 
2.71078E05 
FuelOilGallons 
3.10865E05 
GasolineGallons 
1
British Thermal Units 
BTU 
= 
6.83107E06 
FuelOilGallons 
7.83368E06 
GasolineGallons 
1
KilowattHours 
KWHr 
= 
0.023290596 
FuelOilGallons 
0.026729597 
GasolineGallons 
1
FootPounds 
ftlbs 
= 
8.77838E09 
FuelOilGallons 
1.00324E08 
GasolineGallons 
1
FuelOilGallons 
= 
1 
FuelOilGallons 
1.146771742 
GasolineGallons 

1
GasolineGallons 
= 
0.872013116 
FuelOilGallons 
1 
GasolineGallons 

1
Coal kilograms 
= 
0.135943349 
FuelOilGallons 
0.155895991 
GasolineGallons 

1
Ergs 

= 
6.46961E16 
FuelOilGallons 
7.42489E16 
GasolineGallons 
1
Grams of Fat 

= 
0.000257524 
FuelOilGallons 
0.000295322 
GasolineGallons 
1
Jelly Doughnut 
= 
0.00677696 
FuelOilGallons 
0.007771634 
GasolineGallons 
















WANT→ 

British
Thermal Units 
KilowattHours 

KNOW↓ 



BTU 

KWHr 
1
Joules 
J(Nm) 
= 
0.000947969 
BTU 
2.77822E07 
KWHr 
1
kilocalories(food Calories) 
Calories 
= 
3.96 
BTU 
0.001163 
KWHr 
1
British Thermal Units 
BTU 
= 
1 
BTU 
0.000293297 
KWHr 
1
KilowattHours 
KWHr 
= 
3412 
BTU 
1 
KWHr 
1
FootPounds 
ftlbs 
= 
0.001280675 
BTU 
3.76616E07 
KWHr 
1
FuelOilGallons 
= 
146390 
BTU 
42.9 
KWHr 

1
GasolineGallons 
= 
127654 
BTU 
37.4 
KWHr 

1
Coal kilograms 
= 
199001 
BTU 
5.83 
KWHr 

1
Ergs 

= 
9.47817E11 
BTU 
2.77778E14 
KWHr 
1
Grams of Fat 

= 
37.7 
BTU 
0.011 
KWHr 
1
Jelly Doughnut 
= 
992 
BTU 
0.29 
KWHr 

1
full cord wood 
= 
20000000 
BTU 
5.86 
KWHr 

1
cu ft nat gas 
= 
1020 
BTU 
0.299163195 
KWHr 








UNIT
CONVERSION 



Coal
kilograms 

Ergs 
1
Joules 
J(Nm) 
= 
4.76348E08 
Coal
kilograms 
10001606.4 
Ergs 
1
kilocalories(food Calories) 
Calories 
= 
0.000199406 
Coal
kilograms 
41868000000 
Ergs 
1
British Thermal Units 
BTU 
= 
5.02494E05 
Coal
kilograms 
10558701000 
Ergs 
1
KilowattHours 
KWHr 
= 
0.171457886 
Coal
kilograms 
3.6E+13 
Ergs 
1
FootPounds 
ftlbs 
= 
6.43531E08 
Coal
kilograms 
13558181.04 
Ergs 
1
FuelOilGallons 
= 
7.356005321 
Coal
kilograms 
1.54569E+15 
Ergs 

1
GasolineGallons 
= 
6.414533119 
Coal
kilograms 
1.34682E+15 
Ergs 

1
Coal kilograms 
= 
1 
Coal
kilograms 
2.09964E+14 
Ergs 

1
Ergs 

= 
4.76272E15 
Coal
kilograms 
1 
Ergs 
1
Grams of Fat 

= 
0.001894353 
Coal
kilograms 
3.97746E+11 
Ergs 
1
Jelly Doughnut 
= 
0.049851404 
Coal
kilograms 
1.0467E+13 
Ergs 
















WANT→ 

FootPounds 

grams
of CO2 released 

KNOW↓ 



ftlbs 

gms
CO2 
1
Joules 
J(Nm) 
= 
0.73768021 
ftlbs 
0.000142904 
gms
CO2 
1kilocalories(food
Calories) 
Calories 
= 
3088 
ftlbs 
0.598211642 
gms
CO2 
1British
Thermal Units 
BTU 
= 
778.16932 
ftlbs 
0.15074804 
gms
CO2 
1
KilowattHours 
KWHr 
= 
2655223.9 
ftlbs 
514.3736555 
gms
CO2 
1
FootPounds 
ftlbs 
= 
1 
ftlbs 
0.000193721 
gms
CO2 
1FuelOilGallons 
= 
113916206.8 
ftlbs 
22068.00552 
gms
CO2 

1
GasolineGallons 
= 
99336426 
ftlbs 
19243.59018 
gms
CO2 

1
Coal kilograms 
= 
15486157.88 
ftlbs 
2999.999977 
gms
CO2 

1
Ergs 

= 
7.37562E08 
ftlbs 
1.42882E11 
gms
CO2 
1
Grams of Fat 

= 
29336 
ftlbs 
5.683010596 
gms
CO2 
1
Jelly Doughnut 
= 
772000 
ftlbs 
149.5529104 
gms
CO2 

1
full cord wood 
= 
15563386.4 
ftlbs 
3014.960793 
gms
CO2 

1
cu ft nat gas 
= 
793732.7064 
ftlbs 
153.7630004 
gms
CO2 


WANT→ 





KNOW↓ 



grams
of fat 

JellyDoughnut 
1
Joules 
J(Nm) 
= 
2.51405E05 
grams
of fat 
9.55338E07 
JellyDoughnut 
1
kilocalories(food Calories) 
Calories 
= 
0.105263158 
grams
of fat 
0.004 
JellyDoughnut 
1
British Thermal Units 
BTU 
= 
0.026525895 
grams
of fat 
0.001 
JellyDoughnut 
1KilowattHours 
KWHr 
= 
90.63157895 
grams
of fat 
3.444 
JellyDoughnut 
1
FootPounds 
ftlbs 
= 
3.41103E05 
grams
of fat 
1.29619E06 
JellyDoughnut 
1FuelOilGallons 
= 
3883.125731 
grams
of fat 
147.56 
JellyDoughnut 

1
GasolineGallons 
= 
3386.133368 
grams
of fat 
128.67 
JellyDoughnut 

1
Coal kilograms 
= 
528.5938187 
grams
of fat 
20 
JellyDoughnut 

1Ergs 

= 
2.51417E12 
grams
of fat 
9.55384E14 
JellyDoughnut 
1
Grams of Fat 

= 
1 
grams
of fat 
0.038 
JellyDoughnut 
1
Jelly Doughnut 
= 
26.31578947 
grams
of fat 
1 
JellyDoughnut 