Ask an Expert (Page 111)

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

High frequency as pest deterrent High frequency as pest deterrent I am working on a project to use recycled self watering 2lt and 5lt plastic bottles to grow vegetables. I have read that a high frequency 20-60 kHz may act as a pest deterrent. The containers are filled with 15% water and the above compartment is filled with soil. I just wanted to know if it is possible to get a high frequency sound by using a straw or similar that extended from above the soil to the water below? . Thank… Read more

Research Project survey regarding the subject of mycology.

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

Research Project survey regarding the subject of mycology. Research Project survey regarding the subject of mycology. Hello, my name is Evie Quast. I am a year 11 student at Victor Harbour High School, I am conducting a research project about mycology and its significance in both the natural and man-made world. I hope to provide an answer to the following query: “How can the medicinal / nutritional properties of fungi be implemented in developing countries to reduce food insecurity and the… Read more

AM Crystal radio and Low-power AM radio transmitter

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

AM Crystal radio and Low-power AM radio transmitter AM Crystal radio and Low-power AM radio transmitter To whom it may concern, I am planning to combine the two projects of [b]making an am crystal radio[/b] and [b]building an am radio transmitter[/b]. I was wondering how I can combine them as recommended on your website. Does it mean I have to adjust the tuner on the crystal radio so that I receive the signal from my radio transmitter? Moreover, I faced a problem in finding the 1000:8 ohm… Read more

Testing

Ask an Expert Topic Forum: Careers in Science

Testing Testing Testing Read more

Building a simple motor - same concept as Tesla's

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

Building a simple motor - same concept as Tesla's Building a simple motor - same concept as Tesla's I am teaching an elementary class on inventors and I want to familiarize the students with the person and then do a related project. One of the inventors I chose was Nikola Tesla, famed, for example, for his ideas on an electromagnetic motor. I see your experiment on building a simple electric motor. Would that be an appropriate project relating to Tesla? (By the way, the demonstration… Read more

C4H4 What is the Structural Formula ?

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

C4H4 What is the Structural Formula ? C4H4 What is the Structural Formula ? Information c4h4 structural formula C4H4 : Vinylacetylene is a colorless gas. Boiling Point: 0 to 6°C (32 to 43°F; 273 to 279 K) Solubility in water: low English name c4h4 1-Buten-3-yne Vinylacetylene Butenyne Monovinylacetylene Atomic mass, molecular mass C4H4 What is the structural formula? Atomic mass / Molecular mass (g/mol) c4h4 structural formula : 52.0746 What is C4h4? Vinylacetylene is an organic compound… Read more

Science fair

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

Science fair Science fair I need an example project that could help me make my own really good project for a high school science fair Re: Science fair Hi there, I hope you're having a great day! This is a really open-ended question, because there are so many different kinds of projects. What are some topics you are the most interested in? It would be better to first decide what field you are most interested in and do some searching for projects within that field. We would be happy to help… Read more

Variables in the Chandra x-ray colorizing experiment

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

Variables in the Chandra x-ray colorizing experiment Variables in the Chandra x-ray colorizing experiment This question refers to this project: ttps://www.sciencebuddies.org/science-fair-projects/project_ideas/Astro_p040.shtml#summary I am helping my daughter with her science fair project which involves creating false-color images of x-ray data from the Chandra X-ray telescope (she is looking at Eta Carinae.) She is having trouble, as am I, grasping what the variables are. Her hypothesis is… Read more

Astronomy Question: Lght Spectroscopy

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

Astronomy Question: Lght Spectroscopy Astronomy Question: Lght Spectroscopy When using Light Spectroscopy, how is the light from other stars not drastically effected by the Heliopause and the Oort Clouds of the respective stars? From my understanding (which may be very flawed) Scientists didn't even know there would be a physical plasma between the sun and the interstellar medium. So how could you account for the effects of something you don't even know exists? Read more

Ask an Expert (top 2,000 results)

Explore Our Science Videos