Ask an Expert (Page 110)

Gravity talk

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

Gravity talk Gravity talk Hey hope im not in a incorrect forum for this as im not a student just a curious mind. I hoped to have a real answer to my questions and this was the most working looking site for this. So to my questions. I was thinking about gravity, and had these thoughts. Is there anything behind them? 1. Is it correct in any kind to think einsteins theory(with my simple understanding) in a opposite view, as the space time trapping mass into these certain points of matter. 2. Is… Read more

Question about DIY Mini Drone: Free Flight activity

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

Question about DIY Mini Drone: Free Flight activity Question about DIY Mini Drone: Free Flight activity Can i replace the MOSFETs with L298n Motor Drivers? If its possible please let me know how as soon as possible. Also, does the propellers orientation affects the direction the wind is blown from each motors? because if i use normal motors with propellers, like the ones used in mini fans, the wind is going to be blown above each propellers. how do i fix this?… Read more

Help me with a wet agar medium

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

Help me with a wet agar medium Help me with a wet agar medium Hello, I am a Korean student in Korea. I am using a translator because the technical terms are a little difficult for me. I recently conducted an experiment to grow bacteria through agar medium. However, the badges that were left outside for warm temperatures rained, causing some rainwater to enter. Can germs grow again? Re: Help me with a wet agar medium Hi, Thanks for your question! It is likely that the rain water will affect… Read more

How to build a hydrogen fuel cell

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

How to build a hydrogen fuel cell How to build a hydrogen fuel cell hello, My name is Tawana, and am doing a project of generating electricity from clean hydrogen, but am stuck I am not sure how to build a fuel cell, there are some for sale but there are too expensive if any know how to do this please help me Re: How to build a hydrogen fuel cell Hi Tawana, This sounds like a cool project idea. Here on ScienceBuddies we have a number of fuel cell project guides which you can find by… Read more

Circumference and circle: Are they the same?

Ask an Expert Topic Forum: Grades K-5: Math and Computer Science

Circumference and circle: Are they the same? Circumference and circle: Are they the same? The distance around the limit of a circle is known as the perimeter. The distance across a circle through the middle is known as the measurement. The separation from the focal point of a [url=https://dolgeneraldgme.com/]DGme[/url] circle to any point on the limit is known as the sweep. Read more

Dealing With Diabetes - Artificial Pancreas

Ask an Expert Topic Forum: STEM Activities

Dealing With Diabetes - Artificial Pancreas Dealing With Diabetes - Artificial Pancreas My Daughter wants to start this project for her science fair in Woodlands TX. She had a question : Can this be designed to add decrease in glucose levels as we have members in our family who also suffer from low sugar. How do i add her into this account as well? Re: Dealing With Diabetes - Artificial Pancreas Hi - I deleted the email address that you posted, please do not post personal contact… Read more

Configuration of substitute component

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

Configuration of substitute component Configuration of substitute component Hi, this for the What sensors are best project (https://www.sciencebuddies.org/science-fair-projects/project-ideas/Robotics_p043/robotics/autonomous-car-sensors) The project need the ultrasonic distance sensor with [u][b]3 pins[/b][/u](https://www.jameco.com/z/28015-Parallax-Parallax-PING-trade-Ultrasonic-Distance-Sensor_282861.html?avad=182414_c31ae6f65&source=Avantlink) However, in my country, the only ones… Read more

Question about Build a Disk Siren activity

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

Question about Build a Disk Siren activity Question about Build a Disk Siren activity The disc’s can create a special sound is because the air is cut by the hole on the disc. But when we did the experiment ,we discovered that the sound’s wave in frequency spectrum produces “Harmonics”.Why the trim cut air brings out Harmonics? [size=150][/size] ------------------------------------- Leave this to help the Experts: The activity can be viewed at:… Read more

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