by bfinio
Fri May 26, 2017 10:21 am
Forum: Grades 9-12: Physical Science
Topic: How Blue is Your Sports Drink? HELPPP!
Replies: 1
Views: 50

Re: How Blue is Your Sports Drink? HELPPP!

Hi Aleks - it's very important to have your multimeter set up correctly for this to work. First, make sure you follow step 4 exactly to set up your multimeter. Then, have you tried this, as listed in step 7b? "If your multimeter screen displays a "1 .", that means the resistance is to...
by bfinio
Mon May 15, 2017 6:19 pm
Forum: Grades K-5: Physical Science
Topic: Science Fair Stress.
Replies: 3
Views: 194

Re: Science Fair Stress.

Hi mssjs, I'm glad to hear things are going well. We do love to hear success stories if you've found any of Science Buddies' resources useful, and we also welcome constructive feedback if you think any of our resources could be improved. Please don't hesitate to contact us at scibuddy@sciencebuddies...
by bfinio
Mon May 15, 2017 6:15 pm
Forum: Grades K-5: Physical Science
Topic: Light Tracking Robot
Replies: 3
Views: 176

Re: Light Tracking Robot

Hi mssjs, We have a pretty detailed breadboard tutorial that might be a huge help if you have not looked at it yet, especially the video at the beginning: http://www.sciencebuddies.org/science-fair-projects/how-to-use-a-breadboard.shtml To do what you're describing, start with the final circuit for ...
by bfinio
Mon May 15, 2017 6:06 pm
Forum: Grades 6-8: Physical Science
Topic: Smart Dustbin
Replies: 3
Views: 107

Re: Smart Dustbin

Hi HuyRisk,

Sorry this is a little late, but science buddies has a project related to this topic you might be interested in, similar to what Rick suggested, that can be done with a low budget: http://www.sciencebuddies.org/science-f ... p046.shtml
by bfinio
Fri Apr 28, 2017 11:18 am
Forum: Grades 6-8: Physical Science
Topic: How the temperature of sports balls affects their performance
Replies: 2
Views: 102

Re: How the temperature of sports balls affects their performance

Hi ovalskis, Science Buddies has several projects about measuring bouncing balls, and how the bounce height is affected by changing different variables like air pressure, the surface you drop the ball on, or the initial height. You could modify these procedures so you change the ball's temperature i...
by bfinio
Mon Apr 17, 2017 9:15 am
Forum: Grades 9-12: Physical Science
Topic: Existing device? The volume of air moved by a speaker does not reflect the low Hz *sound,* that your body feels.
Replies: 5
Views: 181

Re: Existing device? The volume of air moved by a speaker does not reflect the low Hz *sound,* that your body feels.

Hi Hyrdgun, Another term you are looking for is "frequency response" which shows a speaker's loudness at different frequencies, not averaged across the entire frequency range. We have an abbreviated project idea (meaning it just provides some initial background information, it does not giv...
by bfinio
Mon Apr 17, 2017 8:48 am
Forum: Grades 6-8: Physical Science
Topic: Conductive dough, but motor doesn't work
Replies: 3
Views: 147

Re: Conductive dough, but motor doesn't work

Hi Technic - I'd also recommend only using very short lumps of dough to connect the battery pack to the motor. If you use long "tubes" of dough, it will still work for the LEDs but the resistance will be too high for the motor.
by bfinio
Tue Apr 04, 2017 1:29 pm
Forum: Grades K-5: Physical Science
Topic: Where to get led traffic glove materials?
Replies: 2
Views: 120

Re: Where to get led traffic glove materials?

Hi, Jameco Electronics (http://www.jameco.com) is another good place to buy electronics supplies. If you search they should have a 2xAAA battery holder with cover and switch. We usually suggest them but they do not carry the LilyPad LEDs used in this project. You can not use a 1xAAA holder because t...
by bfinio
Wed Mar 29, 2017 6:30 am
Forum: Grades K-5: Physical Science
Topic: Gauss rifle
Replies: 2
Views: 135

Re: Gauss rifle

Hi - I checked and it looks like the magnets are N35. Hope that helps.
by bfinio
Fri Mar 24, 2017 5:31 am
Forum: Grades 6-8: Physical Science
Topic: Transformer problems
Replies: 4
Views: 355

Re: Transformer problems

Rick - there's a schematic on the background tab of the project, see Fig 2: http://www.sciencebuddies.org/science-fair-projects/project_ideas/Elec_p024.shtml#background [edited this post to avoid future confusion - Rick and I discussed and confirmed that the schematic in Fig 2 of the background is c...
by bfinio
Mon Mar 20, 2017 8:56 am
Forum: Grades 6-8: Physical Science
Topic: Transformer problems
Replies: 4
Views: 355

Re: Transformer problems

Hi eicpiemann - are you following the instructions in this Science Buddies project? http://www.sciencebuddies.org/science-fair-projects/project_ideas/Elec_p024.shtml#materials If so, is there a reason you weren't able to purchase the suggested transformer from Jameco? http://www.jameco.com/webapp/wc...
by bfinio
Thu Mar 09, 2017 8:34 am
Forum: Grades 9-12: Math and Computer Science
Topic: Delete a file deleted my hard drive!
Replies: 1
Views: 243

Re: Delete a file deleted my hard drive!

Hi jbthefirst - I'm sorry to hear you had trouble with the program. I looked at the reviews for this program online and the vast majority of them were good, but I did find one review that mentioned a problem similar to what you described. I would suggest that you google "boot Windows in safe mo...
by bfinio
Thu Mar 09, 2017 7:28 am
Forum: Grades 6-8: Physical Science
Topic: Hydraulic Lift Project is problematic
Replies: 2
Views: 234

Re: Hydraulic Lift Project is problematic

*One additional thought - another variable you could measure, that isn't mentioned in the current project, is the distance each piston moves. i.e. how far does the slave piston move if you fully depress the master piston through its full range. You can also use this to analyze mechanical advantage s...
by bfinio
Thu Mar 09, 2017 7:17 am
Forum: Grades 6-8: Physical Science
Topic: Hydraulic Lift Project is problematic
Replies: 2
Views: 234

Re: Hydraulic Lift Project is problematic

Hi dkreft7, Thanks for pointing this out. I just read through the experiment and you're right - as written, it doesn't really make sense. The procedure described in step 5 to "see if the lift supports the weight" depends on static friction and has nothing to do with the force you're applyi...
by bfinio
Fri Mar 03, 2017 7:25 am
Forum: Grades K-5: Physical Science
Topic: Electric Play Doh!
Replies: 3
Views: 323

Re: Electric Play Doh!

Hi ssharrow - I have tested both versions of this. Rick is correct that the homemade stuff works great. I'm not sure what the exact ingredients are in store-bought Play-Doh but it turns out that it's also conductive, and store-bought modeling clay is an insulator as Rick mentioned. So it really come...

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