Ask an Expert (Page 33)

Automatic Watering System: LCD problem when pump is on

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

Automatic Watering System: LCD problem when pump is on Automatic Watering System: LCD problem when pump is on We are trying to build an "Automatic Watering System" using Arduino. We have gone through the videos posted by Science Buddies and combined several different videos to build this. Arduino is connected to moisture sensor, a buzzer (when pump turns on), LEDs (green and red to show pump off/on respectively), and an LCD display to show (mositure level, pump status). Pump is a very small… Read more

Telescope

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

Telescope Telescope What is distance between the object lens and eye lens in the telescope you had given convex lens of focal length 500mm and concave lens of focal length 150mm Re: Telescope Hi - Are you working on a science project? If so, please tell us about your experiment. The experts in the forums are not able to provide homework or test help. Amy Science Buddies Read more

MIT App Inventor

Ask an Expert Topic Forum: Grades 6-8: Math and Computer Science

MIT App Inventor MIT App Inventor What are the requirements for full completion? Re: MIT App Inventor Hi - It isn't clear what project you are asking about or what project you are planning to do with MIT App Inventor. If you can more fully explain the question, someone may be able to assist. Amy Science Buddies Read more

Question about Are You Left or Right Brained? activity

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

Question about Are You Left or Right Brained? activity Question about Are You Left or Right Brained? activity Type your question below and then press Submit! How do i do it without so many people ------------------------------------- Leave this to help the Experts: The activity can be viewed at: [url=https://www.sciencebuddies.org/stem-activities/left-right-brain-dominance] Are You Left or Right Brained? [/url] Re: Question about Are You Left or Right Brained? activity Please note that… Read more

Salt water battery

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

Salt water battery Salt water battery PLEASE HELP!!! I did the salt water battery experiment,but i can’t tell whether or not it’s producing the amount of energy that it should be producing! I have restarted the experiment and am getting the same results. Please help,I need answer. I hope this isn’t bother. Re: Salt water battery Hello! This is an interesting issue. I can't exactly help you without any other information. Could you tell me what your setup is so I can help you better? Re:… Read more

The effectiveness of soap and hand sanitizer

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

The effectiveness of soap and hand sanitizer The effectiveness of soap and hand sanitizer Hello, I have been working on an experiment where I test the effectiveness of hand soap versus hand sanitizer. I touched an iPhone and a laptop keyboard before washing my hands for 20 seconds, then used a sterile cotton swab to transfer the bacteria into a petri dish by swabbing my hands and then drawing a line across the agar. They have been incubating for a week now and still have not shown any… Read more

JWST Gray Images Download Process

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

JWST Gray Images Download Process JWST Gray Images Download Process Respected Sir/Mam, I hope this question finds you well. I already setup the all modules of GIMP and G'MP, but I'm encountering some problems after MSAT for JWST. I downloaded all the datasheets in multiple rows and columns in (.csv file) here, I'm not be able to extract those (GRAY images). May you kindly help in this regard ASAP. I'm looking for your positive response. Thanking You Yours Truly Engineer [Administrator… Read more

Question about Make a Fire Snake activity

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

Question about Make a Fire Snake activity Question about Make a Fire Snake activity Type your question below and then press Submit! What is the procedure and how to handle a fluid in safety handling? ------------------------------------- Leave this to help the Experts: The activity can be viewed at: [url=https://www.sciencebuddies.org/stem-activities/make-a-fire-snake]Make a Fire Snake[/url] Re: Question about Make a Fire Snake activity Hi shecaina, The Fire Snake is a great activity!… Read more

Question about DIY Mini Propeller Car activity

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

Question about DIY Mini Propeller Car activity Question about DIY Mini Propeller Car activity Type your question below and then press Submit! Hello, Will the clockwise motors and propellers work as well? Thank you, Jen ------------------------------------- Leave this to help the Experts: The activity can be viewed at: [url=https://www.sciencebuddies.org/stem-activities/DIY-mini-propeller-car]DIY Mini Propeller Car[/url] Re: Question about DIY Mini Propeller Car activity Hi! This looks… Read more

Resistors Fuel Cells—Fueling the Future!

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

Resistors Fuel Cells—Fueling the Future! Resistors Fuel Cells—Fueling the Future! Hello, I used two 150 ohm resistors in parallel and the circuit does not work. The hydrogen kit works fine, but when I add the resistors in. It just does not work. Can you suggest a solution. My experiment is due March 10 [Administrator note / Project url: https://www.sciencebuddies.org/science-fair-projects/project-ideas/Energy_p002/energy-power/fuel-cells ] Re: Resistors Fuel Cells—Fueling the Future! Hi -… Read more

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