Ask an Expert (Page 80)

Rubberband Car Challenge

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

Rubberband Car Challenge Rubberband Car Challenge Many of my students are creating a slingshot style car within the guide lines / rules. All components are attached to the car and stay intact. Is this OK :?: Thank you! Re: Rubberband Car Challenge Hi - yes, as long as your students are following all the other rules (e.g. they're not building a slingshot with separate launcher and projectile parts or where the rubber band is not attached from the car), this style of car is OK! Re:… Read more

Underwater self-sufficient fuel cell

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

Underwater self-sufficient fuel cell Underwater self-sufficient fuel cell Hello, I am a 16 yo.old, I didn't know where exactly to ask this question but here goes... We know that using electrolysis, we are able to split water into hydrogen and oxygen. We also know hydrogen can be used as fuel. What if in an underwater vessel, we were able to construct a system where, water from the waterbody is collected in a tank, filter it, and electrolyse it. We would then get hydrogen and oxygen, of… Read more

Not sure I’m smarter than a first grader

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

Not sure I’m smarter than a first grader Not sure I’m smarter than a first grader My 7 yo granddaughter has a curious mind. The other morning on the way to school, the car wet with dew. When we stopped, a drip started to run down the windshield. Before the drip reached the bottom, we turned which made the drip go sideways rather than down. She asked why. I’m not sure if I gave her the correct info but I feel like there were 3 things at play. When we stopped and the dew on the car did not stop… Read more

Fighting the Flu: How Your Immune System Uses Its Memory

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

Fighting the Flu: How Your Immune System Uses Its Memory Fighting the Flu: How Your Immune System Uses Its Memory Hello, For my project's experiment iron fillings are used and so are Magnetic tape and a Digital scale with 0.1-g increments. On the page, it gives a link to these items on Amazon but my science fair is in 4 days, so the materials won't come in time. Do you know if there is anything else I could use instead of these items? Or if there is any specific place I could buy them from?… Read more

Dam model with safety systems

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

Dam model with safety systems Dam model with safety systems I need to build a model dam with 2 solenoid valves. One is for normal activation, the other is emergency. Unfortunately, I have no idea of how to wire this all up and code it. Can someone please explain the wiring and coding to me?(Note: I am using relays for the valves.) Re: Dam model with safety systems Hi, This is more than we can really teach you how to do in a forum post. We have a resource page about how to use an Arduino… Read more

Needed: interview with a hardware engineer

Ask an Expert Topic Forum: Interview Requests

Needed: interview with a hardware engineer Needed: interview with a hardware engineer Name: How long have you been an engineer? : Where did you go to college to get your engineering degree? : What kind of classes did you have to take in college? : What are some things you like about your job? : What are some dislikes? : Would you change or do different if you knew what you know now? : How much money should I anticipate earning when I get my degree? : Would you recommend this… Read more

Question about Exploring Enzymes activity

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

Question about Exploring Enzymes activity Question about Exploring Enzymes activity Can you recommend suitable dish wash or any other alternative substance for dish wash. As expected form is not observed even after trying with various dish washes . ------------------------------------- Leave this to help the Experts: The activity can be viewed at: [url=https://www.sciencebuddies.org/stem-activities/explore-enzymes-catalase]Exploring Enzymes[/url] Re: Question about Exploring Enzymes… Read more

Magnetic tape for Maglev train project

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

Magnetic tape for Maglev train project Magnetic tape for Maglev train project Hello, does anybody know anywhere that I could get magnetic tape that is monopolar? Re: Magnetic tape for Maglev train project Hello! A couple of places you can go to for monopolar magnetic tape are: - Amazon - Ebay - Specific electronic suppliers (like Mouser) Hope this helps! Morgan Re: Magnetic tape for Maglev train project Hi - The project… Read more

Materials for Rubber Band Car Challenge

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

Materials for Rubber Band Car Challenge Materials for Rubber Band Car Challenge Hi! I have a question about the plastic bottle caps allowed for the 2024 rubber band car engineering challenge. Are students just allowed to use caps like from milk jugs? Or literally bottles like a bottle of water? Or can they use plastic lids from something like a peanut butter jar? It said any size was acceptable, but I'm not sure if a jar lid is considered OK or not. Please let me know. Thanks! Holly Re:… Read more

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