Welcome to International Journal of Engineering Research and Development (IJERD)IJERD Editor
call for paper 2012, hard copy of journal, research paper publishing, where to publish research paper,
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
CSEC Physics Lab - Use of makeshift beam balance to find density of liquidRonaldo Degazon
Situation: A student is asked to calibrate a beam balance using the principle of moments and use their calibration to find the density of a liquid P.
NB: Assume that he mass of 1 ml of water is 1g.
Hypothesis:The density of the liquid methylated spirit can be found using a makeshift calibrated beam balance and a measuring cylinder.
Aim: To obtain the density of a liquid using a makeshift beam balance to find the mass.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Welcome to International Journal of Engineering Research and Development (IJERD)IJERD Editor
call for paper 2012, hard copy of journal, research paper publishing, where to publish research paper,
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
CSEC Physics Lab - Use of makeshift beam balance to find density of liquidRonaldo Degazon
Situation: A student is asked to calibrate a beam balance using the principle of moments and use their calibration to find the density of a liquid P.
NB: Assume that he mass of 1 ml of water is 1g.
Hypothesis:The density of the liquid methylated spirit can be found using a makeshift calibrated beam balance and a measuring cylinder.
Aim: To obtain the density of a liquid using a makeshift beam balance to find the mass.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
1. The Effect of Water
Velocity on Osmosis
Karen Ni, Mara Tynan, and Joyce Yan
2. Hypothesis
• To understand how water velocity
affects the rate of osmosis.
• As the velocity of the water increases,
the rate of osmosis will increase.
3. Introduction
• osmosis- movement of water across a
selectively permeable membrane from an
hypotonic to hypertonic environment
• velocity- speed with direction
• acceleration- Δvelocity
• increased height=faster final velocity
• faster velocity=water molecules pass
through membrane and enter cell faster
• Δd=.5at2+Vit
4. Materials o tape
o 2 meter sticks
o Three eggs
o rubber tubing
o 5% vinegar solution
o Beakers: o scissors
o 2-100mL o timer
o 1-500mL o electronic mass scale
o 4-250mL o paper towels
o 100mL graduated
cylinder
o tap water
o thermometer
o 2 funnels
o cheesecloth
5. Method
o Eggs deshelled
o For all trials
mass taken before and after
volume of remaining water measured
21oC water
60s
o Control
each egg placed in 250mL for 60s
o Experimental
Egg placed on the funnel with the cheesecloth
stretch over it.
Water poured down the tube at different
lengths (therefore speeds and velocities)
7. Results: 1.5 m
Trial: Initial Mass Final Mass Difference in
(grams) (grams) Mass (grams)
1 89.7 90.25 0.55
2 82.85 82.9 0.05
3 81.66 81.78 0.12
Average Difference in Mass: 0.24 grams
8. Results: 1 m
Trial: Initial Mass Final Mass Difference in
(grams) (grams) Mass (grams)
1 90.37 90.6 0.23
2 82.93 83.03 0.1
3 81.44 81.63 0.19
Average Difference in Mass: 0.17 grams
9. Results: .5 m
Trial: Initial Mass Final Mass Difference in
(grams) (grams) Mass (grams)
1 90.11 90.24 0.13
2 83.01 83.19 0.18
3 81.42 81.63 0.21
Average Difference in Mass: 0.17 grams
10. Results: O m (Constant)
Trial: Initial Mass Final Mass Difference in
(grams) (grams) Mass (grams)
1 83.65 84.08 0.43
2 82.47 82.75 0.28
3 80.93 81.17 0.24
Average Difference in Mass: 0.32 grams
11. Graph (With Control considered)
Average Difference of Mass in Different Heights of Water
0.35
0.3
Average Difference in Mass (grams)
0.25
0.2
0.15
0.1
0.05
0
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
Height Water was Dropped
12. Graph (Without Control
considered)
Average Difference in Mass in Different Heights of Water
0.3
0.25
Average Mass Difference (g)
0.2
0.15
0.1
0.05
0
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
Height Water was dropped (meters)
13. Full Scatter Plot (with trendline)
Difference in Mass over Different Heights
0.6
0.5
Difference in Mass (grams)
0.4
y = 0.066x + 0.128
0.3 R² = 0.039
0.2
0.1
0
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
Height Water was dropped (meters)
14. Analysis
• Averages of difference in mass seemed to
increase slightly as height increased
o Individual trials showed that for the highest
height tested (1.5m) two of the trials in fact
displayed a lower difference than the
averages of all three heights
o One high outlier (0.55 g) skewed average
• Control group exhibited a greater average
difference in mass than that of all
heights.
15. Conclusion
• Data does not support hypothesis
o Lin-reg T test comes up with a p value of
0.332
Above the significance level- not sufficient
evidence to show that there was a positive
association between water velocity and rate of
osmosis.