by C. Stephen Murray, 2003. The Atom. Everything is made of atoms. Atoms are
the smallest part of matter. Atoms are made up of 3 subatomic particles (particles
...
cstephenmurray.com. Negative sign means deceleration. Acceleration and
Average Speed. Acceleration. Acceleration is how fast you change speed OR.
The graph on the right is a distance versus time graph. That means that it shows
how far an object has traveled after so many seconds. This is what we call a.
Lecture 12: Control Charts for Variables. Spanos. EE290H F05. 3. Statistical
Basis for the Charts standard deviation: A normally distributed variable x with
known ...
Weight. Fw = mg. Weight equals mass times the acceleration of gravity. Mass. (in
kg). Acceleration of gravity. (9.8 m/sec2). Force of. Weight. (in Newtons).
Period: HW3:9 Test Review. Mr. Murray, IPC cstephenmurray.com. 1. For Oxygen
give the following: A. Oxidation #. B. # of protons. C. Valence Electrons ______.
To do this we must be able to classify the things we encounter. Heterogenous ...
Anything that has mass and takes up space we call matter. Everything you can ...
Mr. Murray, IPC. Name: IPC Textbook Guided Reading – Chapter 10. Period: DO
NOT TURN THIS IN – Keep for homework. 1. Magnetic means the ability to: 2.
Hardfacing by welding is one of the economic methods to improve wear resistance of engineering components. The present work reports slurry abrasion ...
Mr. Murray, IPC. Name: IPC Textbook Guided Reading – Chapter 5. Period: DO
NOT TURN THIS IN – Keep for homework. 1. Give the equation for work: 2.
Types of Circuits and Ohm's Law. Two lightbulbs in series. Each light is
dependent on the other. Two lightbulbs in parallel. Each light is independent of
each ...
Jul 25, 2010 - in the determination of antioxidant properties by b-carotene bleaching assay: experiments with BHT used as standard antioxidant. Andrzej L.
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Sep 17, 2002 - formation and maintenance of the pancreas, we have genetically ... can be controlled by the application of tetracycline or its analogue.
Control and Experimental Variables - Cstephenmurray
Variables in Experiments— Experiments demand control. If more than one variable changes at a time, the cause and effect is unclear.
Control Variables—the variables that you control (don’t change) in an experiment. The control variables are all other variables than the experimental variable.
Experimental Variable—the variable that you are studying (changing) in an experiment. It is the only variable you change.
Example: If you want to know how speed affects gas mileage, then speed is the only variable that should change. The car, tires, road, wind speed need to stay the same—be controlled. They are control variables.
Example: If you are studying how salt affects boiling temperature, then salt is the experimental variable. By only changing the salt you will be able to learn how it works.
Determine what the experimental variable is in these experiments.
Experiment: How does vitamin B-12 affects health? What would be the experimental variable?
How does salt change the freezing temperature of water? Why would this be a difficult experiment? Does ultraviolet (UV) radiation affects skin cancer.
DATA
Question: Does weight affects the speed of an object going downhill? Hypothesis: Experiment: Experimental variable: Control variables:
Procedure: Make sure that the ring stand is in the 10th hole from the bottom. Put the photogates at 10 cm and 20 cm. Do three trials each with: 1) no weights; 2) 1 weight; 3) 2 weights.
No weights Trial
∆T
1 weight Trial
1 weight Trial
∆T
1
1
1
2
2
2
3
3
3
Average T
Average T
Average T
∆D
∆D
∆D
Speed 1
Speed 2
Speed 3
∆T
Conclusion: How does weight affect the speed of the car?
Calculate the average speed for each. How did having control variables make the experiment easier than in the previous experiment?
