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 v2 = .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 KW-Hrs a week.
2)
When I read my electric meter it is 1249180 on Monday and 124900 the next week,
so I used 720 KW-Hrs 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(N-m) |
= |
1 |
J |
0.000238834 |
Calories |
|
1kilocalories(food
Calories) |
Calories |
= |
4187 |
J |
1 |
Calories |
|
1
British Thermal Units |
BTU |
= |
1055 |
J |
0.251996 |
Calories |
|
1
Kilowatt-Hours |
KWHr |
= |
3599406 |
J |
861 |
Calories |
|
1
Foot-Pounds |
ft-lbs |
= |
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 |
|
= |
9.99835E-08 |
J |
2.38846E-11 |
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(N-m) |
= |
6.4746E-09 |
FuelOilGallons |
7.42608E-09 |
GasolineGallons |
|
1kilocalories(food
Calories) |
Calories |
= |
2.71078E-05 |
FuelOilGallons |
3.10865E-05 |
GasolineGallons |
|
1
British Thermal Units |
BTU |
= |
6.83107E-06 |
FuelOilGallons |
7.83368E-06 |
GasolineGallons |
|
1
Kilowatt-Hours |
KWHr |
= |
0.023290596 |
FuelOilGallons |
0.026729597 |
GasolineGallons |
|
1
Foot-Pounds |
ft-lbs |
= |
8.77838E-09 |
FuelOilGallons |
1.00324E-08 |
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 |
|
= |
6.46961E-16 |
FuelOilGallons |
7.42489E-16 |
GasolineGallons |
|
1
Grams of Fat |
|
= |
0.000257524 |
FuelOilGallons |
0.000295322 |
GasolineGallons |
|
1
Jelly Doughnut |
= |
0.00677696 |
FuelOilGallons |
0.007771634 |
GasolineGallons |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
WANT→ |
|
British
Thermal Units |
Kilowatt-Hours |
||
|
KNOW↓ |
|
|
|
BTU |
|
KWHr |
|
1
Joules |
J(N-m) |
= |
0.000947969 |
BTU |
2.77822E-07 |
KWHr |
|
1
kilocalories(food Calories) |
Calories |
= |
3.96 |
BTU |
0.001163 |
KWHr |
|
1
British Thermal Units |
BTU |
= |
1 |
BTU |
0.000293297 |
KWHr |
|
1
Kilowatt-Hours |
KWHr |
= |
3412 |
BTU |
1 |
KWHr |
|
1
Foot-Pounds |
ft-lbs |
= |
0.001280675 |
BTU |
3.76616E-07 |
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 |
|
= |
9.47817E-11 |
BTU |
2.77778E-14 |
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(N-m) |
= |
4.76348E-08 |
Coal
kilograms |
10001606.4 |
Ergs |
|
1
kilocalories(food Calories) |
Calories |
= |
0.000199406 |
Coal
kilograms |
41868000000 |
Ergs |
|
1
British Thermal Units |
BTU |
= |
5.02494E-05 |
Coal
kilograms |
10558701000 |
Ergs |
|
1
Kilowatt-Hours |
KWHr |
= |
0.171457886 |
Coal
kilograms |
3.6E+13 |
Ergs |
|
1
Foot-Pounds |
ft-lbs |
= |
6.43531E-08 |
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 |
|
= |
4.76272E-15 |
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→ |
|
Foot-Pounds |
|
grams
of CO2 released |
|
|
KNOW↓ |
|
|
|
ft-lbs |
|
gms
CO2 |
|
1
Joules |
J(N-m) |
= |
0.73768021 |
ft-lbs |
0.000142904 |
gms
CO2 |
|
1kilocalories(food
Calories) |
Calories |
= |
3088 |
ft-lbs |
0.598211642 |
gms
CO2 |
|
1British
Thermal Units |
BTU |
= |
778.16932 |
ft-lbs |
0.15074804 |
gms
CO2 |
|
1
Kilowatt-Hours |
KWHr |
= |
2655223.9 |
ft-lbs |
514.3736555 |
gms
CO2 |
|
1
Foot-Pounds |
ft-lbs |
= |
1 |
ft-lbs |
0.000193721 |
gms
CO2 |
|
1FuelOilGallons |
= |
113916206.8 |
ft-lbs |
22068.00552 |
gms
CO2 |
|
|
1
GasolineGallons |
= |
99336426 |
ft-lbs |
19243.59018 |
gms
CO2 |
|
|
1
Coal kilograms |
= |
15486157.88 |
ft-lbs |
2999.999977 |
gms
CO2 |
|
|
1
Ergs |
|
= |
7.37562E-08 |
ft-lbs |
1.42882E-11 |
gms
CO2 |
|
1
Grams of Fat |
|
= |
29336 |
ft-lbs |
5.683010596 |
gms
CO2 |
|
1
Jelly Doughnut |
= |
772000 |
ft-lbs |
149.5529104 |
gms
CO2 |
|
|
1
full cord wood |
= |
15563386.4 |
ft-lbs |
3014.960793 |
gms
CO2 |
|
|
1
cu ft nat gas |
= |
793732.7064 |
ft-lbs |
153.7630004 |
gms
CO2 |
|
|
|
WANT→ |
|
|
|
|
|
|
KNOW↓ |
|
|
|
grams
of fat |
|
JellyDoughnut |
|
1
Joules |
J(N-m) |
= |
2.51405E-05 |
grams
of fat |
9.55338E-07 |
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 |
|
1Kilowatt-Hours |
KWHr |
= |
90.63157895 |
grams
of fat |
3.444 |
JellyDoughnut |
|
1
Foot-Pounds |
ft-lbs |
= |
3.41103E-05 |
grams
of fat |
1.29619E-06 |
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 |
|
= |
2.51417E-12 |
grams
of fat |
9.55384E-14 |
JellyDoughnut |
|
1
Grams of Fat |
|
= |
1 |
grams
of fat |
0.038 |
JellyDoughnut |
|
1
Jelly Doughnut |
= |
26.31578947 |
grams
of fat |
1 |
JellyDoughnut |
|