Ask an Expert (Page 119)

Question about Explore Glow-in-the-Dark Water! activity

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

Question about Explore Glow-in-the-Dark Water! activity Question about Explore Glow-in-the-Dark Water! activity [color=#FFBFFF][/color] Hey! I was wondering, does the amount of bleach I add affect this project. Like, if I add less bleach would it not stop the glow completely? Thanks. :D :D :D :D :D The activity can be viewed at: [url=https://www.sciencebuddies.org/stem-activities/tonic-water-glows]Explore Glow-in-the-Dark Water![/url] Re: Question about Explore Glow-in-the-Dark Water!… Read more

Designing a lock mechanism for a fingerprint-activated wallet

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

Designing a lock mechanism for a fingerprint-activated wallet Designing a lock mechanism for a fingerprint-activated wallet Hello, I'm a Grade 12 student and for our project we are making a fingerprint wallet. Currently, our plan is to buy a separate fingerprint sensor which will be hooked up to some sort of mechanism that locks the wallet, but we are having trouble coming up with a way to make that mechanism in the first place. Ideally, it would be lightweight which limits our options quite… Read more

How Old Is The Universe Project

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

How Old Is The Universe Project How Old Is The Universe Project So I'm on the part where I have to calculate the colors of the stars in the globular clusters. Thing is, I'm on borrowed time. It is already night and I had to change my project because I was not able to retrieve all of the items I needed for my last project in time. The globular clusters have thousands of clusters and I was wondering if it would mess up my results if I were to only calculate 50 stars for each globular… Read more

Question about "points" disappearing in Google Earth Pro

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

Question about "points" disappearing in Google Earth Pro Question about "points" disappearing in Google Earth Pro Dear Science Volunteers, I'm helping my 5th grade daughter work on a science project suggested through Science Buddies, tracking wolf data. We needed to download data from Movebank.org and then analyze it through Google Earth Pro. While my daughter was locating points on the wolf's tracks, suddenly the "points" option disappeared from the side panel on Google… Read more

Gravity

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

Gravity Gravity I've been trying to find a page to ask scientific questions to cure my insatiable curiosities and found this webpage that I thought might benefit many people. I have a daughter of age with this specific group and answers will be shared with that equally curious mind. Here goes, for my first question: when our planet's orbit of the sun lines up with the direction of the Milky Ways spin, do we experience a change in gravitational pull? I know we experience an ovacular shaped… Read more

Antimicrobial resistance in goat milk.

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

Antimicrobial resistance in goat milk. Antimicrobial resistance in goat milk. Hi, I'm been working on goat milk to make it as food product which has high immune boosting molecules comparing to other milk. For that as the first step I'm trying to finds its antimicrobial resistance test by using well diffusion method. I'm getting negative results as my concentration is very low. When I went through research papers they have mentioned that the optimum concentration is 5mg/ml and I'm using… Read more

Light tracking bristle not data?

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

Light tracking bristle not data? Light tracking bristle not data? Hi I’m a 7th grader and I decided to build a light tracking bristle bot for my science fair project the only problem is that we have to have data but I don’t know what my data for this project can be. So my question is what is the data I can use for this project? Re: Light tracking bristle not data? Great choice for a science fair project! For a light tracking bristle bot project, you can collect various types of data to… Read more

Wind Turbine error

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

Wind Turbine error Wind Turbine error Hello! I have a science fair (Unfourtunately in 3 days) and i'm having trouble with my wind turbine. I am using a 2-6v D.C motor and have a 4 blade windmill (each being 10cm x 1cm x the depth which i am adjusting). However it isn't producing more than 0.4v and of course not producing enough energy to light up a bulb. I'm desperate thank you much. Re: Wind Turbine error Hi, A 2-6V DC motor means that the motor is rated to work with a 2-6V power supply… Read more

Does a megnet affect static feild on a CRT TV? if not what does?

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

Does a megnet affect static feild on a CRT TV? if not what does? Does a megnet affect static feild on a CRT TV? if not what does? ive seen this video of these Japanese fellows playing CRT TV guitars and drums (https://www.youtube.com/watch?v=A0VYsiMtrNE) and i started to ponder on how that would work and ive thought of a basic layout (this not regarding the PCB construction) so far i believe it would contain of a CRT TV RCA jacks 1 magnet 1 footpedal for a real guitar 1 receiver (Maybe… Read more

Vitamin C concentration

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

Vitamin C concentration Vitamin C concentration So I was doing a Vitamin C Titration experiment basically like the orange juice one posted on this site, but instead with an aqueous Capsicum Solution. I was wondering if the equation used on experiment actually figures out the concentration of vitamin C in each sample or I need to find a different one, as my science Teacher didn't know if the question was right or wrong. If I need a new equation my teacher suggest to use concentration=… Read more

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