Ask an Expert (Page 95)

Question about Build a Popsicle Stick Catapult activity

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

Question about Build a Popsicle Stick Catapult activity Question about Build a Popsicle Stick Catapult activity If I use wood, popsicle sticks, and plastic to make a catapult, will I determine which one will launch the projectile farther? [Administrator note - the Google presentation link has been removed. Please note that anyone who assists here in the forums will not be able to share an email address with you. You will need to post your questions here for assistance.] Re: Question about… Read more

Life saving Animal Water Dispenser

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

Life saving Animal Water Dispenser Life saving Animal Water Dispenser Hi, I am currently beginning a design project. I am interested in producing a product that significantly reduces the number of animal deaths due to the Australian Climate. I have come across the idea of creating a fire-resistant smart water dispenser to be placed near bushfire prone areas. This dispenser would consist of fire-proof materials such as polycarbonate and a motion sensor for ease of use and efficiency. One… Read more

Problem with bacterial growth on agar plates

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

Problem with bacterial growth on agar plates Problem with bacterial growth on agar plates Posting on behalf of a student. Student is doing this project: Which Acne Medication Can Really Zap That Zit? https://www.sciencebuddies.org/science-fair-projects/project-ideas/MicroBio_p019/microbiology/acne-zits-medication The student says they have followed the instructions and have seen no growth on the plates after more than a week. (They also ordered and used extra bacteria and saw no growth.) … Read more

Breast Cancer and AI Project

Ask an Expert Topic Forum: Grades 9-12: Math and Computer Science

Breast Cancer and AI Project Breast Cancer and AI Project Recently I've been working on the breast cancer and AI project that uses a KNN algorithm. However, the code does not seem to work once I get past the PAC graphing stage. Unfortunately, I can't upload any of the pictures of the code but I am getting name errors for the PAC variable then in the next section I'm getting name errors for the neighbors variable. The code I'm using is the same original one in the breastcancer.ipynb file that… Read more

Automatically water plants circuit

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

Automatically water plants circuit Automatically water plants circuit How can I add pontiometers and a digital monitor to the arduino soil moisture sensor with automatic pump Re: Automatically water plants circuit Hi, We can't provide exact instructions and code for you, but I would recommend check out our How to Use an Arduino series: https://www.sciencebuddies.org/science-fair-projects/references/how-to-use-an-arduino It includes videos on potentiometers and an LCD screen that you could… Read more

Help With Microbial Fuel Cell Project

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

Help With Microbial Fuel Cell Project Help With Microbial Fuel Cell Project Hi, I am currently doing my senior-level engineering project. My partner and I are planning on constructing a Microbial Fuel Cell capable of utilizing a 5 person family's food waste and creating enough power to charge a phone. We were planning on creating it to support about 7-10 pounds of waste, could anyone help us with how to do this? Re: Help With Microbial Fuel Cell Project Hi, We have multiple projects on our… Read more

Question about Do-It-Yourself DNA activity

Ask an Expert Topic Forum: STEM Activities

Question about Do-It-Yourself DNA activity Question about Do-It-Yourself DNA activity Type your question below and then press Submit! Did you see anything stick to the skewer that might be DNA? Can you spool any DNA onto the skewer? ------------------------------------- Leave this to help the Experts: The activity can be viewed at: [url=https://www.sciencebuddies.org/stem-activities/strawberry-dna-extraction]Do-It-Yourself DNA[/url] Re: Question about Do-It-Yourself DNA activity Did… Read more

Facing problem when doing the arduino bluetooth car using arduino nano

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

Facing problem when doing the arduino bluetooth car using arduino nano Facing problem when doing the arduino bluetooth car using arduino nano So I have been trying to make an Arduino Bluetooth car using Arduino Nano, Bluetooth module, and motor driver. when I was doing my project I had a Bluetooth module that got connected to the app in the phone but did not perform commands. For a few days, I kept on trying to make it work one day I thought it was short-circuited or something so it didn't… Read more

Dealing with Diabetes - Developing an Artificial Pancreas - Pump Help

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

Dealing with Diabetes - Developing an Artificial Pancreas - Pump Help Dealing with Diabetes - Developing an Artificial Pancreas - Pump Help Hi! I have picked developing an artificial pancreas for my science fair project, but have run into some issues. After I connect the pump to the 5V and GND on my Ardino, the pump works. However in the next step, when I connect the pump to the middle pin on the MOSFET, nothing happens. I have rebuilt the whole thing again, and have tried everything to fix… Read more

Arduino Clinostat

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

Arduino Clinostat Arduino Clinostat Hello, I am working on an Arduino Clinostat but there are a few issues I have 1. Is there any alternative to Petri Dish that I can use? as the petri dishes are taking a week to arrive. 2. Can a 180 degree positional servo motor be used instead of the continuous rotating 360 degree one?? For reference to the project-… Read more

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