Ask an Expert (Page 126)

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

QUESTION: Identifying DNA Experiment QUESTION: Identifying DNA Experiment Hello, My daughter and were about to begin this experiment, and I needed to double-check that we are performing it correctly. In the materials section, it lists deionized water, but in the procedure section (Food Coloring Dye Separation Experiment section, Step #1) where one is making the buffer solution, is says to add bottled water. This may sound like a ridiculous question, but can you confirm that the bottled… Read more

Manual braking for the Automatic braking experiment

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

Manual braking for the Automatic braking experiment Manual braking for the Automatic braking experiment Hi, We are on step 12) testing out the manual braking. The car runs and does stop when you press on the manual brake but no lights are going off to indicate to manual brake. The lights are position as in figure 7. Thanks, Christy Re: Manual braking for the Automatic braking experiment I apologize, we swapped the old ones for new and it works! Read more

Time Travel

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

Time Travel Time Travel I am 14 and in the 8th grade i go to south Pittsburgh high school and i have found a way to time travel but i dont know who to contact that about im being for real people dont beleive me they think im crazy but i have found out how Re: Time Travel Hi - These forums are for students working on science projects who need assistance with troubleshooting or with specific steps of the project. Amy Science Buddies Read more

Meters to NTU

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

Meters to NTU Meters to NTU Hi, Does anyone know how to convert meters to NTU? I need turbidity data, however I have visibility data in meters and am unsure on how to get it to NTU. Thanks. Read more

Re: Automatic braking with bluebot

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

Automatic braking with bluebot Automatic braking with bluebot Hi, We have downloaded the Adruino program, we have also downloaded the automatic braking code, and senor to the robot. We are on 6. C when I select the monitor there are no readings shown. What would I need to do next? Also, when I disconnect the robot from the usb it will not run? When it’s connected to the usb it will run. Thanks, Christy Re: Automatic braking with bluebot Hi Christy, 1) Can you let me know which… Read more

Automatic braking with bluebot

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

Automatic braking with bluebot Automatic braking with bluebot Hi, We have downloaded the Adruino program, we have also downloaded the automatic braking code, and senor to the robot. We are on 6. C when I select the monitor there are no readings shown. What would I need to do next? Also, when I disconnect the robot from the usb it will not run? When it’s connected to the usb it will run. Thanks, Christy Re: Automatic braking with bluebot Hi Christy, 1) Can you let me know which… Read more

Arduino Car Questions

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

Arduino Car Questions Arduino Car Questions [Posted on behalf of students working on this project: How Fast is Automatic Braking? https://www.sciencebuddies.org/science-fair-projects/project-ideas/Robotics_p044/robotics/autonomous-car-automatic-braking] We have download the Adruino program and have uploaded the automatic braking code and the ping code from examples. When we unplug from the Chrome the car spin in circles. It stops if you put your hand in front of it. Also, Does it matter… Read more

Science Fair project questions. Good project idea? If so, what is my Independent Variable?

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

Science Fair project questions. Good project idea? If so, what is my Independent Variable? Science Fair project questions. Good project idea? If so, what is my Independent Variable? Do you think this is a good idea for a Science Fair project? "Which has more bacteria on it in restaurants; menus or the entrance handle to the bathroom?" Our controls would be swabbing a brand new (right out of the box) handle, and a new printed menu. The dependent variables would be four samples swabbed from… Read more

Absorption of Radiant Energy by Different Colors- equation 5

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

Absorption of Radiant Energy by Different Colors- equation 5 Absorption of Radiant Energy by Different Colors- equation 5 I performed the exact equation you did for equation 5 and i always end up with a negative exponent When i do the equation with your numbers i also get a negative number. What you did wrong is when you divide with the 1.6 x 10 -19 you are using a positive 19. should i be using a positive 19 instead of a negative 19? Moderator Note: Hi Billily, I've combined your 3 posts… Read more

Lego shake table - graphing and variables

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

Lego shake table - graphing and variables Lego shake table - graphing and variables I am helping my kindergartener with the Lego shake table experiment, for his science fair project. He’s planning to build a few different tower heights and we will decide on several displacement values which we will repeat for each tower. I had a couple of questions: 1. How would you display the data in a fun way? Is there a certain type of graph that fits well with these variables and results? 2. Should the… Read more

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