Ask an Expert (Page 189)

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

Developing an X-ray Analysis App Developing an X-ray Analysis App Hi, I am thinking about making an app that analyzes pictures and can take X-rays identifying an injury that is not visible to the naked eye. I was wondering what type of coding language I would use to start? Re: Developing an X-ray Analysis App Are you exploring this for a school science project? What programming or app development experience do you have so far that might be helpful in thinking about what you can do for a… Read more

downwind faster than the wind car

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

downwind faster than the wind car downwind faster than the wind car hi what would be a suitable hypothesis for a downwind faster than the wind vehicle. The research question is: [b][color=#000080]Is it possible for an entirely wind-powered vehicle to travel directly downwind faster than the wind.[/b][/color] Re: downwind faster than the wind car Your hypothesis will need to be related to what you decide to test in your project (e.g., which variable you decide to change and explore). Are… Read more

Need some help with this electrolyte experiment

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

Need some help with this electrolyte experiment Need some help with this electrolyte experiment So the first part of my experiment was to measure the electric charge of electrolytes (at 200mA on a multimeter) at differing gram amounts: 5, 10, 15, 20, 25, 30, 35,40, 45, 50 and my results were as following: 10.5 12.6 13.4 15.2 16.3 18.7 16.9 16.5 13.8 13.2 is this correct as it feels incorrect. And each time I re-measure the bowls of aqueous electrolyte solution it has a large differing… Read more

Help!

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

Help! Help! I’m doing a science fair and using this project: “Crime Scene Chemistry: The Kastle-Meyer Test for Blood” My teacher told me to dilute it, just like it says in “Make It Your Own” Why would I need to dilute it? How does that relate to a real life crime scene? How do I us revise exact ratios in diluting it. Sorry, I’m new!! Re: Help! Hello! That's a really good question! Blood at a crime scene can get diluted in a lot of different ways. For example, blood can get diluted when it… Read more

Potentiometers and Mosfet

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

Potentiometers and Mosfet Potentiometers and Mosfet Hi team This is Peter. My question is about the Potentiometer connection in the breadboard in DIY Mini Drone: Altitude Control Circuit and I have attached the screenshot. In my opinion, the connection should be only two probes not three. Can anyone explain why it is the case. Also, can someone explain how does the Mosfet work Regards Peter. [attachment=0]DIY Mini Drone_ Altitude Control Circuit - STEM Activity.pdf[/attachment] Re:… Read more

Materials Science - point me in the right direction?

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

Materials Science - point me in the right direction? Materials Science - point me in the right direction? Hi - I'm an adult, not trained in science. This is probably not the ideal place for me to ask but I'm hoping someone can point me in the right direction. I'm trying to make something that will bend wire a certain way. I don't think I need to get into a lot of the detail here, but I'm just trying to find out if anyone knows of a forum where I can ask someone with expertise, or even… Read more

How to calculate the pressure of biogas in a tank?

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

How to calculate the pressure of biogas in a tank? How to calculate the pressure of biogas in a tank? if i have a 1m3 tank with full of biogas in it, how can i calculate the pressure of the biogas against the wall of thank, is there any formula for it? sorry for my bad english Re: How to calculate the pressure of biogas in a tank? Hello, ScienceBuddies is for helping students with science fair projects. Could you tell us a bit more about your project so we can better help you? Audrey Re:… Read more

Help! Why is my bacteria not growing as a lawn?

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

Help! Why is my bacteria not growing as a lawn? Help! Why is my bacteria not growing as a lawn? Hello, I am doing a science project where i am testing the effectiveness of natural disinfectants vs commercial disinfectants on bacteria grown from surfaces, using the disc diffusion method. The first time I conducted a trial, i swabbed a sterile cotton swab all over a drinking fountain button, added one drop of distilled water in the centre of my agar plate and swabbed the bacteria evenly… Read more

Are the questions for my survey good enough.

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

Are the questions for my survey good enough. Are the questions for my survey good enough. Hi I am doing a survey to find out why people are hesitant in taking the covid vaccine and I just needed an expert to determine if the questions where good enough and if there were any areas of improvement.I was also wondering if adding pictures to the survey would be more effective.Thank you for at least taking the time to read this Here is the link to the survey [link removed by moderator] Re: Are… Read more

Question about Make Your Own Harmonica! activity

Ask an Expert Topic Forum: STEM Activities

Question about Make Your Own Harmonica! activity Question about Make Your Own Harmonica! activity how to make a tyre space idea ------------------------------------- Re: Question about Make Your Own Harmonica! activity Hi - Your question doesn't seem to be about the Harmonica activity you posted on. If you are working on a science project and have specific questions, please explain more about your project. Amy Science Buddies Read more

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