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Drone Altitude Control Circuit

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

Drone Altitude Control Circuit Drone Altitude Control Circuit I'm working on the Drone Altitude Control Circuit and can't get the the Potentiometer (the blue rectangular part with a white knob) to work. I've taken all the wires out of the breadboard and put all the pieces in the board according to the instructions. The motor turns on and the propellers all work. The challenge is that I can't get the knob to work so that I can control the output of the battery power. Any suggestions on how… Read more

URGENT-Light Tracking Robot

Ask an Expert Topic Forum: STEM Activities

URGENT-Light Tracking Robot URGENT-Light Tracking Robot Hello 👋 Mom of a 5th grader doing the "Light Tracking Robot" project. Our Science Fair is Wednesday and this is a last ditch effort to save our project... We have quadruple checked everything and...we can't get it to work. Once we have the power source connected (batteries) and the switch is ON the motors run with light or without. The Potentiometer doesn't seem to make a difference. We have searched the boards and found… Read more

Question about Turn Milk into Plastic activity

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

Question about Turn Milk into Plastic activity Question about Turn Milk into Plastic activity Type your question below and then press Submit! Why do we have to use skim milk to make plastic? ------------------------------------- Leave this to help the Experts: The activity can be viewed at: [url=https://www.sciencebuddies.org/stem-activities/milk-into-plastic]Turn Milk into Plastic[/url] Re: Question about Turn Milk into Plastic activity Hi - You don't. The materials for the activity… Read more

I need some help making some percentages for my science fair project

Ask an Expert Topic Forum: Grades 6-8: Life, Earth, and Social Sciences

I need some help making some percentages for my science fair project I need some help making some percentages for my science fair project Recently, I've come across a roadblock. I have created a science fair topic about the absorption of different materials in soil, and to compare them, to see if making a more renewable source can be effective. However, after doing 3 rounds of testing over 4 days, I don't know exactly how to create the math for the project. I want to create a percentage that… Read more

M&M survival challenge

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

M&M survival challenge M&M survival challenge Dear Expert, if you pick this experiment (candy camouflage). Can you ask the question: “How does mimicry help prey survive?” Can this specific experiment answer this question? I'm not sure about it. Thank you in advance for your support. Here is the link to the project we would like to work with: [url]https://www.sciencebuddies.org/science-fair-projects/project-ideas/Zoo_p012/zoology/mms-survival-challenge-camouflage[/url] Re: M&M… Read more

Question for - Finding the Center of the Milky Way Galaxy Using Globular Star Clusters

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

Question for - Finding the Center of the Milky Way Galaxy Using Globular Star Clusters Question for - Finding the Center of the Milky Way Galaxy Using Globular Star Clusters My daughter wants to do this project for her Space Exploration class. The data set seems quite old. Is there a newer one she can use? Re: Question for - Finding the Center of the Milky Way Galaxy Using Globular Star Clusters Hello JacksonI69, Finding the center of the Milky Way galaxy using globular star clusters is a… Read more

How does x affect y?

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

How does x affect y? How does x affect y? How does x affect y? I would like to test the toxicity levels of energy drinks and soda to show how bad they are to us. Any suggestions Read more

Question on 3-D Clinostat Experiment

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

Question on 3-D Clinostat Experiment Question on 3-D Clinostat Experiment I created the 3-D clinostat using my arduino kit but the potentiometer does not seem to function properly. Is there any way I can alter the code and apparatus to remove the potentiometer, since this seems to be my main issue? I am also have issues with the code to decrease the rpm. Could I receive guidance on how to resolve these two main issues? [Administrator note: Project url:… Read more

Hello Lead levels in soil

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

Hello Lead levels in soil Hello Lead levels in soil Hello, I am working on lead soil levels for my project. What is the safe lead level for experimentation purposes? I looked up ISEF rules and am not sure I found the answer. Can I use 500 ppm in the soil? Is this allowed per ISEF standards for a student to work on? Re: Hello Lead levels in soil We would recommend checking with ISEF regulations and, if you can't find a definitive answers, reaching out to contacts listed on their site so that… Read more

Physics

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

Physics Physics If we see the following images In the first image, the centre dot represents a massive thing for example the event horizon of a black hole. Suppose parallel rays of light are coming from the -X direction.Now I have drawn the path followed by each ray (geodesic). A deflection is seen due to curvature of space time fabric [here only a 2d space analog is shown]. How can I imagine the curvature of space time from this diagram. I tried to do the same on the right side and… Read more

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