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Other color filters for How Blue is Your Sports Drink?

Ask an Expert Topic Forum: Grades 9-12: Physical Science

Other color filters for How Blue is Your Sports Drink? Other color filters for How Blue is Your Sports Drink? Posting on behalf of student: "I want to test the concentration of red dye in sports drinks following the procedure for "How Blue is your Sports Drink?" The procedure says that we can test for red dye by making a blue green filter. Can you give me guidance on how many drops of blue and yellow dye would make a blue green filter? The procedure for an orange filter is 1/2 cup of… Read more

Great globs of gluten

Ask an Expert Topic Forum: Grades 6-8: Physical Science

Great globs of gluten Great globs of gluten We are doing a suggested variation of this project using additives of sugar and salt to compare the development of glutens. How much sugar or salt should be added to the dough? Should the same procedure of washing the dough balls, etc be followed? For results, will the heaviest flour ball have the most gluten? Marcie [Administrator note: Project link… Read more

Voltage to Light Problem

Ask an Expert Topic Forum: Grades 9-12: Physical Science

Voltage to Light Problem Voltage to Light Problem I’ve been working on a science project dealing with different brands of AA batteries. In my experiment, though, sometimes a lower voltage battery would output more light than a higher voltage. They’re all in the same flashlight model, and all ran at the same time. Does anyone have an idea why this is? Re: Voltage to Light Problem Hi - this is a bit of a crash-course in electronics, so this may make more sense if you've take a physics class… Read more

Fuel Cell Efficiency Material Help

Ask an Expert Topic Forum: Grades 6-8: Physical Science

Fuel Cell Efficiency Material Help Fuel Cell Efficiency Material Help I am planning to do the Fuel Cell Efficiency Science Fair Project. I wanted my experiment problem statement to be based on how the fuel cell efficiency differs based on the type of catalyst, as suggested in the 'variations' tab. After possibility previewing the experiment, could any person with the knowledge suggest some catalysts that can be safely be reacted with 0.1M phosphate buffer, water, and nickel electrodes as seen… Read more

Dissolved Oxygen test- title and ideas needed

Ask an Expert Topic Forum: Grades K-5: Life, Earth, and Social Sciences

Dissolved Oxygen test- title and ideas needed Dissolved Oxygen test- title and ideas needed Hi, I am helping my 5th grader. she chose to test dissolved oxygen levels in different water sources and temperatures. school only allows to have one independent variable and one dependent variable. but her teacher approved the hypothesis, which to me includes two independent variables. water sources and temperatures, am I thinking right? or it is still one of each variables? can i add option of… Read more

Dissolved Oxygen test- title and ideas needed

Ask an Expert Topic Forum: Grades K-5: Life, Earth, and Social Sciences

Dissolved Oxygen test- title and ideas needed Dissolved Oxygen test- title and ideas needed Hi, I am helping my 5th grader. she chose to test dissolved oxygen levels in different water sources and temperatures. school only allows to have one independent variable and one dependent variable. but her teacher approved the hypothesis, which to me includes two independent variables. water sources and temperatures, am I thinking right? or it is still one of each variables? can i add option of… Read more

pid (proportional integral derivative) code not working(2)

Ask an Expert Topic Forum: Grades 9-12: Physical Science

pid (proportional integral derivative) code not working(2) pid (proportional integral derivative) code not working(2) Hello. I'm doing this project: https://www.sciencebuddies.org/science- ... l-pancreas. I'm trying to write a pid code to finetune the "pancreas" function using the arduino coding language (C++). The code is as follows: #include <PID_v1.h> // Define constants const double setpoint = 700; // Setpoint value // Define PID parameters const double Kp = 1.0; // Proportional… Read more

Humidifier mist sprayer

Ask an Expert Topic Forum: Grades 9-12: Physical Science

Humidifier mist sprayer Humidifier mist sprayer I made a simple humidifier at home, will this create mold in the house? Re: Humidifier mist sprayer Hello, Can you tell us a little bit more about your particular science experiment so we can better help? Thanks, Audrey Read more

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