Ask an Expert (Page 32)

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

STS Finalist

Ask an Expert Topic Forum: Preparing for the Competition

STS Finalist STS Finalist Is there any STS finalist who can tell me what the competition is like? What kind of questions will we be asked and what to expect? Beyond knowing your project in depth (which is given), is there anything to prepare for, and if so, how? Re: STS Finalist Hi John - Congratulations if you are moving on as an STS finalist! I don't believe there are volunteers helping in these forums right now who will be able to provide information about presenting at this fair.… Read more

Question regarding pill score calculation for delayed release pill challenge

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

Question regarding pill score calculation for delayed release pill challenge Question regarding pill score calculation for delayed release pill challenge In the below mentioned experiment, the pill score calculation starts with 700.I am not sure why the score starts with 700? Can you please explain in detail the reason for it? Thank you. Regards, Nishka 6th grade student. Delayed Release Pill Challenge: Getting Medicine to the Right Place at the Right Time Abstract A lot of medication comes… Read more

Jumping Robot

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

Jumping Robot Jumping Robot Hi, Is there a video to show how to solder the on/off switch and or use the breadboard switch for the jumping robot? I tried to add a switch to the robot and the battery would start to smoke. What am I doing wrong? What’s the best way to install a switch to turn it on / off? Re: Jumping Robot Hi there, There is no video on ScienceBuddies that shows how to solder the wires, however you can use a breadboard to supplement the soldering. All the switch does is… Read more

Electricity, Electrolytes, Confused Parent

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

Electricity, Electrolytes, Confused Parent Electricity, Electrolytes, Confused Parent Hello, I'm helping my son with his science fair project. Our plan is to guess which of various substances will _______ electricity [this is my question] the best. He will make a guess, explain it and then conduct the experiment (with close supervision). Ammonia, vinegar, distilled water, lemon juice and a few substances will have zinc and copper nails dipped in them, with each hooked up to a voltmeter. … Read more

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