Ask an Expert (Page 35)

Soil Moisture Sensor

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

Soil Moisture Sensor Soil Moisture Sensor Posted on behalf of student ------------------------------------- I ordered the electronic sensors kit. I want to build the soil moisture sensor and I made sure I followed all the instructions on your website. I made sure nothing is touching each other and the the lightbulb is placed the right way. However, I cannot get the light to turn on. Can you please take a look at the pictures below and tell me what i have done wrong? Project url:… Read more

Glucose Project

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

Glucose Project Glucose Project Posted on behalf of family/students --------------------------------------------- My boys are doing a Sienice project. UNHIDDEN SUGARS IN YOUR FOOD We run to a problerm using controlled environment when we were testing glucose strip - adding 4 grams of glucose gave us only 0.5% - green we were unable get 2% of concentration. We bought another glucose tests and sane. We added 20 g to 200 ml than we got brown colour 2% . Just unsure if glucose is not strong ? Or… Read more

Predict air quality with machine learning code issue

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

Predict air quality with machine learning code issue Predict air quality with machine learning code issue When I run the code provided with the experiment my MAE is 13.---- as I was reading trying to find out what that really meant, that is basically the amount of units the prediction is off by, but in the explanation it say that if it is about .13 its off by 13 units, I am just asking if I am doing the code wrong or is the explanation worded wrong, should my MAE be closer to .13? I am… Read more

Question about Build a Pizza Box Solar Oven activity

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

Question about Build a Pizza Box Solar Oven activity Question about Build a Pizza Box Solar Oven activity Type your question below and then press Submit! what is a purpose of building a solar oven ------------------------------------- Leave this to help the Experts: The activity can be viewed at: [url=https://www.sciencebuddies.org/stem-activities/solar-oven]Build a Pizza Box Solar Oven[/url] Re: Question about Build a Pizza Box Solar Oven activity Hello Elitheyeetgod, Building a solar… Read more

Facial Recognition Error

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

Facial Recognition Error Facial Recognition Error I am having a hard time with the last part of the code. I am getting an error after capturing a picture on my webcam. In the Zip files, there are no pictures or files in the "verification_images" folder. Should files be here? Moderator Note: Project:… Read more

Sucrose Glucose and Fructose OH My! Uncovering Hidden Sugar In Your Food

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

Sucrose Glucose and Fructose OH My! Uncovering Hidden Sugar In Your Food Sucrose Glucose and Fructose OH My! Uncovering Hidden Sugar In Your Food Hello, I am helping my daughter with this project. We’re not sure how many graphs we should have and how the data should be displayed. “Graph your results. Make a bar graph and put the food names of the samples on the x-axis and the glucose concentration on the y-axis. Include both glucose readings for each sample (before adding invertase and… Read more

Pet Treat dispenser data

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

Pet Treat dispenser data Pet Treat dispenser data So what would my data be about and what would i be testing? Moderator note - project: https://www.sciencebuddies.org/science-fair-projects/project-ideas/Elec_p106/electricity-electronics/automatic-dog-treat-dispenser Re: Pet Treat dispenser data Hello imoncloud9, The automatic pet treat dispenser is a great project! There are many directions you could take to turn this into a science fair project. One idea is to dispense treats at a set… Read more

How Easily Can Your Password Be Hacked method not working

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

How Easily Can Your Password Be Hacked method not working How Easily Can Your Password Be Hacked method not working I'm doing the "How Easily Can Your Password Be Hacked?" project for a science fair but I encountered an error when running the program. When asking the program to guess password 0 it uses method 3 first and it works perfectly fine. But when going on to use method 4 the program just stops. It says "Using method 4 with 26 punctuation characters and 30000 words..." and nothing… Read more

Replacement source - Cobalt Nitrate Hexahydrate

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

Replacement source - Cobalt Nitrate Hexahydrate Replacement source - Cobalt Nitrate Hexahydrate Posted on behalf of family --------------------------------------------- My son would like to run this experiment for his science fair project. We are unable to find the chemical Cobalt Nitrate Hexahydrate. The link to Amazon says it no longer has product. Can you offer a substitute or other place to purchase? Water to Fuel to Water: The Fuel Cycle of the Future | Science… Read more

Artificial Pancreas Arduino Questions (pump)

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

Artificial Pancreas Arduino Questions (pump) Artificial Pancreas Arduino Questions (pump) Posted on behalf of student/family ----------------------------------------------------------- i was wondering what external power supply do i need to use a 12V pump instead of a 5V pump, do u mean like a battery or smt? I just more details on how to use the 12V specifically. Firstly, for the Audino Uno kit do I have to buy [the kit linked in the project] in order for the code to work? Also, for… Read more

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