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by Justin72835
September 14th, 2019, 9:31 am
Forum: Question Marathons
Topic: Machines B/C
Replies: 58
Views: 3186

Re: Machines B/C

Would it be 1.7?
Yup, your turn!
by Justin72835
September 14th, 2019, 4:12 am
Forum: Question Marathons
Topic: Machines B/C
Replies: 58
Views: 3186

Re: Machines B/C

What is the IMA of an inclined plane with an angle of 35 degrees?
by Justin72835
September 11th, 2019, 2:36 pm
Forum: Question Marathons
Topic: Machines B/C
Replies: 58
Views: 3186

Re: Machines B/C

You wish to raise one side of a 5,000 kg car to change a flat tire. You have a strong 2x4 to use as a lever, and a 15 cm high block for a fulcrum. The fulcrum is 304,000 µm from the load, and the lever is 1.52 × 10^-6 Mm long. How much force is needed to lift the car? Give your answer in kg. Assume...
by Justin72835
September 8th, 2019, 9:11 pm
Forum: Question Marathons
Topic: Machines B/C
Replies: 58
Views: 3186

Re: Machines B/C

You wish to raise one side of a 5,000 kg car to change a flat tire. You have a strong 2x4 to use as a lever, and a 15 cm high block for a fulcrum. The fulcrum is 304,000 µm from the load, and the lever is 1.52 × 10^-6 Mm long. How much force is needed to lift the car? Give your answer in kg. Assume...
by Justin72835
September 3rd, 2019, 4:24 pm
Forum: Machines B/C
Topic: Machines B/C
Replies: 52
Views: 4633

Re: Machines B/C

Curiously, rule 4.e forbids tests from asking participants to calculate dynamics. Preventing the calculation of force on objects seems to excise much of the physics behind such a physics event. Perhaps, though, I have misunderstood what this line is saying? My present understanding is that the rule...
by Justin72835
May 7th, 2019, 6:10 pm
Forum: 2019 Nationals
Topic: Who's going to Nationals? // 2019 Edition
Replies: 92
Views: 10893

Re: Who's going to Nationals? // 2019 Edition

Division: C
State: Texas
School: Seven Lakes High School
Events: Experimental Design, Fermi Questions, Sounds of Music, Thermodynamics
by Justin72835
May 5th, 2019, 4:05 pm
Forum: 2019 Regionals & States
Topic: Texas 2019
Replies: 82
Views: 13871

Re: Texas 2019

Official Results
Division B
Division C
by Justin72835
January 17th, 2019, 8:42 am
Forum: 2019 Lab Events
Topic: Sounds of Music C
Replies: 204
Views: 25915

Re: Sounds of Music C

So I noticed the rules mentioned how event supervisors “may” move the testing equipment closer for the pitch part. (Part II.f.iii) Thing is, I’m afraid an event supervisor will decide this means they can choose to not move it closer, and on our instrument (copper pipe xylophone), if we want to play...
by Justin72835
January 14th, 2019, 11:07 am
Forum: Thermodynamics B/C
Topic: Thermodynamics B/C
Replies: 127
Views: 17462

Re: Thermodynamics B/C

Maxwell distribution (this is somewhat related, but the questions it asked were NOT related to , a tiny bit of thermo.,some mechanical physics. It didn't have any history or really even focus on one topic, just a whole bundle of random stuff. The test was really weird, as evidenced by the fact that...
by Justin72835
January 11th, 2019, 6:00 am
Forum: Thermodynamics B/C
Topic: Is this decent?
Replies: 13
Views: 1631

Re: Is this decent?

i want to ask a similar question... I used 100 mL of water, the source temp was about 63 deg C (only 1 thermometer and did not measure too accurately). The 1st reading in the device was 57.7, which then dropped down to 50.0 after 30 minutes. The air temperature is about 19 deg C (cold house), which...

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