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Question about lemon battery

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

Question about lemon battery Question about lemon battery My son will be doing lemon batteries. He will be testing voltage from one lemon, then two, three and four in a series and then retesting each 3 times to get an average. Can I just add an additional lemon to each hook up for the tests? Basically, will I need to get 10 lemons (1+2+3+4) or just 4 per test… 30 or 12 overall? Thank you! Re: Question about lemon battery Hi - you can just add one lemon at a time when connecting them in… Read more

pregancy and life expectancy

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

pregancy and life expectancy pregancy and life expectancy I've looked around on the web for answers but cannot seem to find a definitive answer to this question: do women who have had children live longer than women who have never had children? Re: pregancy and life expectancy These forums are for students doing K-12 science projects. Experts here will not have answers to this question other than to suggest you do research. A quick Google search turns up a number of results. Amy Science… Read more

Maglev Train

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

Maglev Train Maglev Train Does the 90° molding have to be clear plastic for the walls of the Maglev Train project? While searching it has been hard to find this at a decent price. We are able to find black plastic, white plastic and wooden molding all that fit the other requirements of 3/4 inch in-depth. Re: Maglev Train It doesn't need to be clear plastic, the clear plastic is just nice because you can see the train floating above the track from the side. Anything that serves as a wall to… Read more

Help with Absorption of Radiant Energy project.

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

Help with Absorption of Radiant Energy project. Help with Absorption of Radiant Energy project. As I was working on this project, I noticed that it said to use the temperature of the white piece of paper as the surrounding temperature in equation 2. At first I was confused, as this means if you try to use equation 2 to calculate P for the color white, the result would be zero. I then realized that this was most likely due to the fact that the color white does not absorb any wavelengths of… Read more

title help please!!

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

title help please!! title help please!! My son's science fair project is "Does the Distribution of Mass Affects an Object’s Velocity?" Can someone please help us come up with a catchy or punny title? Re: title help please!! Sorry, I'm not an expert but: "A weighty complication" ? Re: title help please!! Hello there I believe your son's project, The Weighty Impact on Velocity, fits this title. This title reflects the essence of your son's science show project and might generate interest… Read more

Can biodegradable hydrogels be used to conserve water in farming project question

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

Can biodegradable hydrogels be used to conserve water in farming project question Can biodegradable hydrogels be used to conserve water in farming project question My daughter is doing her project testing 3 hydrogels to see WHICH one will keep the most water absorbed. The question originally asked on the Sci Buddies project is 'can' hydrogels be used to conserve water...test 3 hydrogels... Is her question an acceptable one? The problem she is running into is not being able to find enough… Read more

Most Sustainable Type of Desalination.

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

Most Sustainable Type of Desalination. Most Sustainable Type of Desalination. Hello! Please select a desalination method for implementation in a city with a population of 200,000. The chosen desalination process should either be at a commercial level or have a credible trajectory towards commercialization within the [b][i]next 100 years.[/i][/b] If you choose a type of solar based desalination, you do not have to put "the city may not receive consistent sunlight" as that is not a problem in… Read more

How to determine sucrose concentration in a particular substance

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

How to determine sucrose concentration in a particular substance How to determine sucrose concentration in a particular substance I’m doing the project on how invertase plays a role with fructose, glucose and sucrose. In the analyzing your data section, a part of the equation requires the original sucrose concentration of the substance. How do i determine the original sucrose concentration? Please help, determining original sucrose concentration of a substance is the main part in analyzing… Read more

Question about Build a Balloon Car activity

Ask an Expert Topic Forum: STEM Activities

Question about Build a Balloon Car activity Question about Build a Balloon Car activity Type your question below and then press Submit! why ------------------------------------- Leave this to help the Experts: The activity can be viewed at: [url=https://www.sciencebuddies.org/stem-activities/balloon-car]Build a Balloon Car[/url] Read more

Problem with Arduino Solar BlueBot Robot

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

Problem with Arduino Solar BlueBot Robot Problem with Arduino Solar BlueBot Robot Posting on behalf of student ------------------ Upon assembling the kit and following the instructions we see the circuit is working properly as we can see the robot move in circles upon switching on the switch on the circuit board. However we have a challenge when we connect Arduino via the provided USB cable to Arduino IDE 2.2.1 installed on my Windows 10 laptop. We followed the video tutorial on 'how to use… Read more

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