Ask an Expert (Page 98)

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

Question about Arduino Mass Driver Question about Arduino Mass Driver Daughter is working on this (https://www.sciencebuddies.org/science-fair-projects/project-ideas/Elec_p094/electricity-electronics/arduino-mass-driver#materials) as a science fair project. She has all of it built and we have done a lot of trouble shooting but can't get it to move the projectile pas the first coil. I added an led to the breadboard where the hall effect sensor is connected (5v power and sensor) and confirmed… Read more

Infinity mirrors

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

Infinity mirrors Infinity mirrors Hello, Can the infinity mirror works with images inside the box instead of lights? How will the image be seen if no light is in the box? Thank you. Re: Infinity mirrors The infinity mirror requires lighting inside the box to work. However, you could try mounting a semitransparent image (like something drawn on a projector transparency sheet) inside the box along with the LEDs, and you might see reflections of the image. Read more

Question about Measure Photosynthesis with Floating Leaves activity

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

Question about Measure Photosynthesis with Floating Leaves activity Question about Measure Photosynthesis with Floating Leaves activity Type your question below and then press Submit! (1) what are the possible errors and corresponding improvement? (2) what are the limitations of the experiment? (3) what is the interpretation from the result? ------------------------------------- Leave this to help the Experts: The activity can be viewed at:… Read more

What type of mosfet used in motion activated guard robot

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

What type of mosfet used in motion activated guard robot What type of mosfet used in motion activated guard robot Hello, I am Omar in grade 6. And I am doing a project called motion activated guard robot#1 from your science buddies website. The problem is that I have all the components for the robot except the MOSFETS. I wanted to buy them online but I don't know what model number is used in this project . I just know that it's an n channel MOSFET. can you help me please ? Re: What type of… Read more

Paper Bridge for Pennies - Scientific Method vs EDP

Ask an Expert Topic Forum: Grades K-5: Physical Science

Paper Bridge for Pennies - Scientific Method vs EDP Paper Bridge for Pennies - Scientific Method vs EDP Hello, my daughter is in 2nd grade. She wants to do a project involving paper bridges. Before we start I want to ensure we set her up for success. In the example, she would be coming up with a design, testing, and then creating a new bridge design to test. To me, that sounds like an EDP but from what I read it is better to do the scientific method. How could you create a procedure for this… Read more

elephant toothpaste

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

elephant toothpaste elephant toothpaste I want to experiment on elephant toothpaste, by changing the amount of yeast (catalyst) added. What type of bottles would be best to use? And what is a good way to measure the amount of foam produced? Thanks for your help, Luke Re: elephant toothpaste The question about the type of containers to use is exactly the question suggested for this extension of the elephant toothpaste activity. Have you looked at this yet?… Read more

Willy Waves

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

Willy Waves Willy Waves The materials state that you need an ABS pipe. I've ordered a regular pvc pipe. Should I be worried? Re: Willy Waves ABS and PVC pipe should both work for this experiment. Read more

Titration Project - Soluble starch

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

Titration Project - Soluble starch Titration Project - Soluble starch Doing a vitamin C titration using the sciencebuddies orange titration kit. We are making a starch solution of 200mL but after the starch is dissolved and cooled down, the solution decreases in quantity and is only about 25-50mL. Wondering if this is supposed to happen or not? [Administrator note - Project:… Read more

Yeast metabolism with and without aeration. URGENT

Ask an Expert Topic Forum: Grades 9-12: Life, Earth, and Social Sciences

Yeast metabolism with and without aeration. URGENT Yeast metabolism with and without aeration. URGENT Yeast metabolism with and without aeration. Hi everyone, so i am doing the science buddies project and have a few questions... https://www.sciencebuddies.org/science- ... -anaerobic 1) What would be some other variations or things to add to my project which could make it more rigorous, other than the ones found on the "variations page" 2) why would we need 2 separate graduated cylinders… Read more

Yeast metabolism with and without aeration

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

Yeast metabolism with and without aeration Yeast metabolism with and without aeration Yeast metabolism with and without aeration. Hi everyone, so i am doing the science buddies project and have a few questions... https://www.sciencebuddies.org/science-fair-projects/project-ideas/MicroBio_p009/microbiology/yeast-metabolism-aerobic-anaerobic 1) What would be some other variations or things to add to my project which could make it more rigorous, other than the ones found on the "variations… Read more

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