IB Physics Ideas

Add any ideas that you think of.

Mr.Le-Blanc's Physics Class Period G

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Our list from Friday!

Properties of a running shoe
Properties/durability of a roller coaster at Boomers
Anti-frictional material
Explosion
How does a car react to different grades of fuel?
Determine factors that allow someone to go faster down a waterslide
Food for thought – not eating/eating/energy drink on different days and then taking a basic test
Reusable vs displosable bags – energy conserved?
How does the body conform to throwing different types of sports balls
How does the human body react to energy drinks

Thanks for uploading Friday's ideas Liv!!

The class sits anxiously in class, awaiting a unanimous decision to be reached. Neel sits haphazardly, rubbing one finger on temple and embarking on wacky tangents about how physics applies to the topic. Jeff, biting nails, is concerned about the concept of the "Food for Thought" experiment. Kyle births the moniker "Mentos become Pepsi" in an effort to add new meaning to the explosion concept. Min Ho observes from the sidelines, secretly brewing his next whirlwind idea. More to follow...

[center]"Left Foot, Right Foot"
[center]"Food (And Drink) For Thought"
[center]"Slip Become Slide"

hey would one of you guys mind filling me in on what I missed during the after-school discussion?

hypothesitetic.

Hey everyone-
Ms. Heath e-mailed me back and said that she called NB's former scuba instructor, and he said the lake is only about 15 feet deep in the middle, which is about 4.5 meters.

Hello, here's everything I wrote up today from our design-planning discussion! I'll post the pictures of the board, too

Determining Pressure (unit = Pascal = Nm^-2)
Formula:
- Force/Area of surface
- p = gdh (g = gravity, d = density, h = height)
- note: Upthrust, if necessary, = weight of displaced fluid

RESEARCH QUESTION: How does pressure affect the O2 levels in a body of water?
Independent Variable: pressure
Dependent Variable: O2 levels
Controls: light (type and amount)
Variables:
-minerals
-organisms
-temperature
-pH
-current

Experiment plans: Tap water vs. lake water? Create a “fake lake" in order to better control variables?

Ideas to Consider
-Pole with syringe attached at one end and a line attached to the other to pull it back up
-Take water samples at different locations?
-How will D.O. be affected by photosynthetic organisms?
-Must test for location of photic zone
-What is: Temperature? Current? Salt conc. & pH? in the lake
-How will we know whether the increase/decrease in O₂ levels is due to change in pressure or change in temperature?
-Dissolved oxygen
-Pressure chamber
-60cc syringe (use ziploc bags with oxygen squeezed out)

Apparatus List
-PVC pipe (with meters marked)
-Line
-Boats (3)
-Ziploc bags
-D.O. probes
-60cc syringes
-Camera (waterproof)

HYPOTHESIS: The O2 levels will have a direct negative relationship with the pressure in the lake.
NEED TO FIND: Depth of lake.
Measurements to be taken on: Tuesday, 2/1 (?)

Please take pictures of the actual experiment so we can add it into the power point.

were any of you guys able to find out how deep the lake is?

Yeah I posted it yesterday when Ms. Heath e-mailed me back - 15 feet, approximately 4.5 meters.

so should we take a reading every 3 feet (total of 5) and take 3-5 readers per increment?

are we taking pictures of the set-up today?

(There are some repeats from our day 1 notes)

I.V.: Pressure
D.V.: D.O. content
Controls:
o Temp (outside)
o Volume of water taken
o Lake water
o Amount of time out of water

“Uncontrollable”:
o pH
o Salinity
o Current
o Animal/plant life

Apparatus List
o PVC pipe (2) – Erik
o Boats (2) – school
o Gallon ziploc bags (30) – Harrison, Kyle
o D.O. probes (4) – school
o 60cc syringes (2 and 2 extra) – school
o Fishing line – Erik, Jessica
o Camera – Jessica, Harrison, Olivia
o Electronic balance – school
o Sandals

METHODS NOTES
o 3 TRIALS PER DEPTH
o Lake depth = 4m
o Take measurements at
o Surface
o 0.5 m
o 1 m
o 1.5 m
o 2 m
--------------------
o 2.5 m
o 3 m
o 3.5 m
o 4 m
o A1: italics
o A2: bold

Bring bathing suit/change of clothes!

Day of Procedure
1. A1 and A2 paddle out to lake
2. Use syringe to take water from surface (3 measurements).
3. Use PVC pipe/syringe contraption to get necessary water (3 measurements)
a. 0.5m-2m by A1
b. 2.5m-4m by A2
4. Empty syringe contents innto labeled plastic bag
5. Take D.O. concentration of water in bag
6. Go back to shore and find mass of each sample

Don't forget to bring in your supplies tomorrow everyone!

Hey everyone!!!! Since I'm not going to be here Monday, let it be known that my top choices are the Introduction (including the variables) and the Conclusion/Evaluation (My first choice.) Also, can somebody let me know what transpired on Monday in class? That is all..... Thank You

Just as a "refresher" -- here are the ideas we came up with for the presentation:


PRESENTATION NOTES
o Introduction
o Research Question
o Variables: IV, DV, constants, controlled and uncontrollable variables
o Method for data collection (includes apparatus list) – need one "water" person, one "land" person
o Hypothesis
o Data tables/graphs
o Conclusion/Evaluation
o Improvements
o Pictures of process
o Sample calculations

Ideal Column – UNIFORM substance. So no physical impurities, no current, no sunlight
o 2 m long
o PVC Pipe
o Stopper for bottom of pipe
Depths To Be Measured for Ideal Water (2 trials at each depth, 3 if possible)
o surface
o 0.5 m
o 1.0 m
o 1.5 m
o 2.0 m

Teams for Procedure Day:
o Aqua: Taking measurements
Erik, Jessica
o Terra: Transporting bags
Harison, Kyle, Bruce
o HQ: Data analysis
Olivia, Neel: Masses
Min Ho, Jeff: D.O. probes

We do not plan to calibrate the probes, which means that we will be testing for a change in D.O. rather than the D.O. itself.
D.O. Probe Warmup Procedure: MUST LET PROBE SIT FOR 10 MINUTES IN WATER BEFORE EXPERIMENTING WITH IT.

the data collected today:

Data from the control sample:

are we making a DO vs. Pressure graph? i think that the DO goes on the y axis because it's the dependent variable..