conservation of energy work ib physics jade brown amber schwister pre-ap chemistry bruno chavez...
TRANSCRIPT
Conservation of Energy
Work
IB PhysicsJade BrownAmber Schwister
Pre-AP ChemistryBruno Chavez James LinterCodi Sturgeon
Pre-AP BiologyAudrey BaumanMorgan NaylorMary TolbertBethany Villalobos
Research Question:Does a change in work (ΔW) affect a subject’s temperature and mass?
Hypothesis:
As work increases, temperature will increase and mass will decrease.
Research Plan:Equipment-Treadmill, scale, stopwatch, metre stick, and two willing subjects
Procedure-1) Subject one’s resting temperature, height, and mass will be
recorded.2) Subject one will jog on a treadmill at inclination of x degrees for five
minutes.3) When five minutes have passed, Subject One’s temperature and
mass will again be measured, and recorded.4) Repeat the steps 1-3 with subject two.
Physics
The Physics students will analyze conservation of energy through work done on the system.
Work-Energy Principle Wnet= ½ mv2f-½ mv2
i
ΔKE=Wnet W=Fd
Chemistry
Chemistry students will analyze how the mass of both subjects change during the experiment and why.
Biology
Biology students will determine the reason behind the subject’s increase in temperature.
Subject #1 Codie
Subject #2 Audrey
Data- Codie (subject #1)Day 1 Before After
Temperature 35.7 C 36.9 C
Mass 56.172 kg 55.991 kg
Incline 0 degrees
Velocity 2.235 m/s
Time 300 s
Day 2 Before After
Temperature 35.8 C 37.9 C
Mass 56.81 kg 56.81 kg
Incline 8 degrees
Velocity 2.235 m/s
Time 300 s
Data- Audrey (subject #2)Day 1 Before After
Temperature 36.2 C 36.4 C
Mass 53.454 kg 53.0916 kg
Incline 0 degrees
Velocity .6705 m/s
Time 300s
Day 2 Before After
Temperature 36.4 C 36.6 C
Mass 54.36 kg 54.36 kg
Incline 8 degrees
Velocity 2.235 m/s
Time 300s
Change in Work
Using the Work-Energy Principle Wnet= ½ mv2
f-½ mv2i
the greatest amount of net work done was with the 0 degree inclination. The net work of the 8 degree inclination was 0 because mass stayed the same.
Temperature
The temperature of the two test subjects changed due to the amount of work used running one the incline. The homeostasis of the original temperature was modified therefore the temperature changed.
Mass
- Error in the scale- Loss of Water Weight
- If a subject has large quantities of sodium then that could explian why there was weight lost that quickly.
Conclusion
Are hypothesis was correct in saying as work increased so would temperature but we were incorrect in hypothesizing it would also decrease mass. We believe this is because of clinical error.
SourcesHow to Lose Water Weight Explained by Doctor at the Weight Loss Success. (n.d.). Retrieved May 21, 2015, from http://www.prweb.com/releases/how-to-lose-water-weight/explained-by-doctor/prweb10091919.htm