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Replace L293D with L298N selfdriving car

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

Replace L293D with L298N selfdriving car Replace L293D with L298N selfdriving car Hi, is it possible to replace the L293D H-Bridge with the L298N H-Bridge to get the same results? Re: Replace L293D with L298N selfdriving car Hi - do you have a link to the exact part you are purchasing? In general there are many H-bridges and motor drivers that are compatible with Arduino and used for robotics projects. However, all the circuit diagrams you will find on our website are specific to the L293D… Read more

Question about Stem project: How does the number of parachutes affect terminal velocity

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

Question about Stem project: How does the number of parachutes affect terminal velocity Question about Stem project: How does the number of parachutes affect terminal velocity Is the part at the end of the page where it says to calculate the theoretical terminal velocity necessary for completing the whole stem project? [Administrator note: Project url: https://www.sciencebuddies.org/science-fair-projects/project-ideas/SpaceEx_p043/space-exploration/parachute-terminal-velocity ] Re:… Read more

Obstacle Detecting Glasses

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

Obstacle Detecting Glasses Obstacle Detecting Glasses I ade the obstacle detecting glasses from science buddies project.however,the buzzer in my project is still giving small beeps when any obstacle is not there.it makes a louder noise when an object is there but I want to remove the small beeps when obstacle is not there.How do I do this? [Admin note: Project url: https://www.sciencebuddies.org/science-fair-projects/project-ideas/Elec_p108/electricity-electronics/obstacle-detecting-glasses… Read more

Can you crowdsource a better school environment?

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

Can you crowdsource a better school environment? Can you crowdsource a better school environment? Using the app I'll build using the App Inventor tool, will I be able to send notifications to the users of my app? Re: Can you crowdsource a better school environment? Hi - we recommend asking this question in the App Inventor forums: https://community.appinventor.mit.edu/. App Inventor has many additional features that we do not necessarily use in our projects, and we are not always familiar… Read more

Particle Size and Chemical Reaction

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

Particle Size and Chemical Reaction Particle Size and Chemical Reaction Posted on behalf of parent/student Project: https://www.sciencebuddies.org/science-fair-projects/project-ideas/Chem_p030/chemistry/reactant-size-changes-chemical-reaction-rate --------------- I was hoping someone could reach out to help us with our son's 6th grade Science Experiment. We ordered the Home Science kit that is suggested with the science experiment called: "Can you Change the Rate of a Chemical Reaction by… Read more

Popping boba diameter

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

Popping boba diameter Popping boba diameter I tried the spherification/ popping boba experiment. The video shows very small approximately 2 mm boba being created, but then it also shows larger approximately 8 to 10 mm boba . I've tried in vain to find a syringe that has a larger diameter output, but they don't seem to be available (probably because they need to lock with standard size needles). Could you share a method for creating larger droplets and therefore larger boba? Thank you Re:… Read more

Need Ideas - related to Medical/Human Body

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

Need Ideas - related to Medical/Human Body Need Ideas - related to Medical/Human Body We have been trying to explore topics and my son is interested in doing something in the medical field related to Human body. the last time he did one about effect on various drink on tooth enamel - which he won a prize for, but now he wants to do something related to another organ/body part that is going to be critical for the other students to know about. I looked at the topics suggested but he doesn't… Read more

Microplastics Consumption

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

Microplastics Consumption Microplastics Consumption My daughter in 4th grade wants to do a science fair project related to how much plastic are we consuming unknowingly on a day to day basis. I am not sure how to measure it to prove the amount of plastic consumption and how to make it testable and measurable. Any ideas ? Re: Microplastics Consumption Hello, This seems to be a very large undertaking for a fourth grade science project. A good idea would be to narrow down your topic before… Read more

Thyroid Cancer Recurrence

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

Thyroid Cancer Recurrence Thyroid Cancer Recurrence Hi, I am getting this error when running Code Block 1Z. --------------------------------------------------------------------------- ValueError Traceback (most recent call last) <ipython-input-140-20fc8ed86092> in <cell line: 2>() 1 # Fitting the model to the training data (X_train) and corresponding labels (y_train) ----> 2 model.fit(X_train, y_train) 6… Read more

Arduino boards

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

Arduino boards Arduino boards Hello, We purchased the kit for the plants in microgravity project. We wired Arduino board according to the diagram provided and it is not working. We also noticed a different wiring in the picture where it is mounted and in the video as well. Still no success. We have checked everything. Any suggestions? [Administrator note: Project url:… Read more

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