TMartScience

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@user-uq7en8iq9g 7 күн бұрын

Hello, first of all, thank you for this useful video and secondly, I had a question about SMITHSONITE, that in the laboratory they pour acid on this mineral and then pour the second solution on the same part and the mineral turns red in that part. Can you please tell me what these solutions are and why they cause this color?❤❤❤

@MichaelIsaac-kd1ki 9 күн бұрын

what would you do different if you did this again - it seems like there should not be anything that makes it better. Perhaps the intervals the weight is dropped or the number of holes?

@krishivray 18 күн бұрын

So for your bucket design (2015) how’s you connect the launch pipe and the beach ball while reducing air loss, and what’d u do to keep the actual launch pipe upright.

@John_Who 23 күн бұрын

Assuming the world is "round" (a sphere), and that sun-rays are parallel means, that you have to prove these assumptions first, before assuming anything from these assumptions! You cannot prove anything from unproven assumptions! You failed to prove the circumference of your imaginary globe, because of the fail of proving the globe even exist! A sad case of indoctrination!

@ebonydavis1754 2 ай бұрын

How was he able to know exactly where the sun would be in one city while he was in another ? Can this be replicated today ? I have been searching for recent videos that calculate the earth circumference using the method today

@TMartScience 2 ай бұрын

It was recorded, it was known that every year on or about the 21st of June the sun would shine directly down the well... Another example of why documenting observations and record keeping furthers our collective knowledge.

@marcg1686 Ай бұрын

At local apparent noon the shadow cast by the Sun is at its shortest. In Syene the Sun casts no shadow at LAN, in Alexandria you would measure the shadow every few minutes before and after LAN. The shortest shadow is the one you would use to calculate the angle.

@user-ms1ok8xh4j 2 ай бұрын

Thank you very much, what is the name of the coring please?

@ordjk4797 2 ай бұрын

I didn't understand how he found 7 degrees from the pole to the sun ray?

@TMartScience 2 ай бұрын

If you understand trigonometry, measure the length of the shadow, measure the length of the object causing a shadow. Divide those two then that will be the tangent of the angle. If you do not understand trigonometry, draw a smaller scale triangle and measure the angle with a protractor.

@ordjk4797 2 ай бұрын

I found another video in the recommended that explained it in a better way, thanks anyway for the quick reply@@TMartScience

@esperancaemisterio 2 ай бұрын

Great vid

@pikualt 3 ай бұрын

you sound cold as fuck, respectfully

@Cube_In_Space 3 ай бұрын

Hello, I would just like to thank you for how helpful this video has been throughout what has been an up and down SciOly season for Air Trajectory. I was able to get 1st recently at the SEPA regionals and am looking forward to competing in states as well!

@boredweeb6609 3 ай бұрын

How did u make the mass to drop down the 4 inch pipe?

@TMartScience 3 ай бұрын

There is a force called GRAVITY.... that is usually what makes things fall. I think maybe your question needs to be rephrased... I'd be happy to try and answer a more specific question.

@user-gx2mf7bs3e 3 ай бұрын

How did you set the bolt at different heights? The S hook looks too big to slot through the small holes you have the bolt rest in.

@TMartScience 3 ай бұрын

The bolt was pushed halfway in the tower, then slid through the hook, then out to the other side. Moving the bolt up and down through the holes was a key adjustment feature

@user-xh7en9ps7i 3 ай бұрын

👍👍

@grumpypegasus1892 3 ай бұрын

Hello, how did you figure out where to drill the vent holes?

@TMartScience 3 ай бұрын

I'm not sure we ever figured out the best place to drill the holes. We realized there was too much air coming out too soon, so we added vent holes to allow the mass to accelerate more before compressing the air. This was all built through experimentation... I hope you figure out a way to do it better than we did

@LushModz 3 ай бұрын

Nice

@theresabetaway7775 3 ай бұрын

I always thought of Australian Opal as a Mineraloid rather than a Mineral .

@TMartScience 3 ай бұрын

You are correct in this assessment. For the nature of this video, I wanted to give an example of the property. Technically opal is non-crystalline so therefore not a mineral.

@jacksprat9972 3 ай бұрын

A+....thanks for field trip

@sahasmalla2844 3 ай бұрын

Can you tell me every single material you used to build this

@sahasmalla2844 3 ай бұрын

For the 2016 version it would be really helpful

@sahasmalla2844 3 ай бұрын

I want to build the exact same thing for my state competition

@TMartScience 3 ай бұрын

I appreciate the request, but science is not and SHOULD not be a "cook-book" activity! While it would not take long to come up with a materials list, I have not provided this b/c This device was not built from "ideal parts" . It was built by looking for leftover bits and pieces in our garage... re-use and re-purposing materials is the way to go.

@sahasmalla2844 3 ай бұрын

Yeah, I know but it would be really helpful if you could tell us. I would really appreciate it.@@TMartScience

@TMartScience 3 ай бұрын

@@sahasmalla2844 look at the device, and make it better! There is a lot that I would do different next time around...

@chandradeepkumar7750 4 ай бұрын

Great video. Thanks for sharing this knowledge.

@edyang100 4 ай бұрын

UV light, particularly the shorter wavelength UV, is extremely harmful to skin and eyes. It breaks DNA and could cause skin cancer.

@__buzz__ 4 ай бұрын

Our ball isn't really getting far in our second design. It is not going past 5.5 meters, and we are trying to get to 8 meters. Any advice?

@TMartScience 4 ай бұрын

Have you drilled vent holes

@__buzz__ 4 ай бұрын

no, but the mass is sliding down with no problem@@TMartScience

@vihaanj5560 4 ай бұрын

@@__buzz__ The vent holes are supposed to help so try that. But also remember that the diameters of the ping ball ball and the barrell should be the same.

@PegasusPlayzYT 4 ай бұрын

Hello, how tall was the drop tower in the 2nd design?

@TMartScience 4 ай бұрын

It was as tall as competition rules allowed...

@PegasusPlayzYT 4 ай бұрын

@@TMartScience for the second design, did the mass just drip to the ground and the ping pong ball would be launched right away?

@PegasusPlayzYT 4 ай бұрын

Also, what does the protractor do in the second design?

@TMartScience 4 ай бұрын

@@PegasusPlayzYT the protractor has a string and weight to precisely set the launch angle

@TMartScience 4 ай бұрын

@@PegasusPlayzYT I don't understand your question

@user-ln5dw2bx5s 4 ай бұрын

I recently Found a few fluoreszent rocks. I live in central germany and the rocks came All from Harz Mountains ..the Oldest mines are from 1400 century and u sir have a Real beauty collection sry for my bad english😂

@xiastacey2494 4 ай бұрын

I made three weighs, 1.5kg, 3.5kg and 4.9 kg. The distances the balls shoot are similar. Do you know why? I want to increase the distance.

@TMartScience 4 ай бұрын

We also found that changing the mass did not change the distance that much. We only used one mass. The vent holes along the side of the tower were very useful too. Allow some air to escape so that the projectile did not fire too quickly

@xiastacey2494 4 ай бұрын

Did you found an ideal weight of mass? we made mass with concrete and fishing weight.@@TMartScience

@xiastacey2494 4 ай бұрын

How tall is your 4" PVC? Could you explain the locations of the air vents?

@TMartScience 4 ай бұрын

The height was dictated by the competition rules. We used as tall as permitted. The vents were located to release air on the drop. If you cut too many holes, you can always patch them with something like packing tape. You have to experiment and see what works best

@amrmansour9534 4 ай бұрын

thank you

@user-pg1bv3wh1v 4 ай бұрын

Hi! How did you connect the beach ball to the pvc in your first design? Thank you!

@user-pg1bv3wh1v 4 ай бұрын

Hi! How did you connect the beach ball to the pvc in your first design? Thank you!

@TMartScience 4 ай бұрын

As stated, a hole was cut in the ball, and the ball was attached to a bathroom sink drain. This is just a compression fitting.

@user-pg1bv3wh1v 4 ай бұрын

Hi! How did you connect the beach ball to the pvc in your first design? Thank you!

@TMartScience 4 ай бұрын

As explained in the video, a bathroom sink drain was used. This compression fitting went into a hole in the ball and can easily be attached to other PVC pipe

@curtisnkrystaljoslin1120 4 ай бұрын

Thank u LOL

@MdMofizurRohaman-dx1gq 4 ай бұрын

👌

@gdemler 4 ай бұрын

Do you remember if the toilet flange had a barrel going into the pvc tee, or did the toilet flange just sit on the outside of the tee?

@TMartScience 4 ай бұрын

It depends on your fitting, you could use either one

@husky6114 4 ай бұрын

What would would happen if we didn’t use the vent holes on the side of the drop chamber? Would that be a reason for the ball not going as far as it should be going (2nd design)

@Uman_i 4 ай бұрын

Vent holes allow the weight to drop fully, if there were no vent holes, then the weight wouldn't be able to go all the way down the drop tower due to compressed air building up underneath it.

@TMartScience 4 ай бұрын

@@Uman_i exactly correct

@husky6114 4 ай бұрын

Also, Would it be possible to loan or buy the weight from you?

@TMartScience 4 ай бұрын

@@husky6114 It really is not difficult to make... That is the point of Science Olympiad! Experiment!

@wowookie7967 4 ай бұрын

hi there! I’m using a pretty similar design to the second one in that i have a mass holder (I 3d printed) sliding down the main PVC tube acting as a piston. The issue is, it just doesn’t fire the ball near far enough (maybe a m or two?) I think it’s because there is friction, so I am going to grease everything up, but how different in size was the mass thing vs the inner diameter of the pvc? i think mine is getting caught on the wall and slowing down so the ball doesn’t really fire much at all! Thank you for all the help

@savoryseaweed495 4 ай бұрын

So with the pvc design you need to put vent holes in order for the ping pong ball to not come out prematurely?

@PegasusPlayzYT 4 ай бұрын

Hi! What was inside the pvc tube in the drop tower as an air chamber for the falling mass to hit it?

@TMartScience 4 ай бұрын

Nothing... Just air

@PegasusPlayzYT 4 ай бұрын

@@TMartScience so the mass just fell to the bottom and the ball would be launched?

@TMartScience 4 ай бұрын

@@PegasusPlayzYT Yes, keep in mind the seal of the dropping mass as well as the vent holes along the side are all important for this design.

@PegasusPlayzYT 4 ай бұрын

@@TMartScience how does the design have good consistency with the ball?

@TMartScience 4 ай бұрын

@@PegasusPlayzYT fewer changes in starting conditions= more predictable results

@Uman_i 4 ай бұрын

what brand raquet ball are you using? I have been struggling to find a ball that fits my 2.25 in barrel

@TMartScience 4 ай бұрын

I don't remember... It took a lot of trial and error to find one that fit

@usernameiserror 4 ай бұрын

Nice!!! Super cool

@ashlynnornelas8120 4 ай бұрын

Hey is there anyway you could link the laser pointer STL file

@TMartScience 4 ай бұрын

this was designed on tinkercad freeware. It would be easier to build yourself depending on the size of the laser that you have.

@ashlynnornelas8120 4 ай бұрын

Of course thank you so much

@charlesxdh4468 4 ай бұрын

hi, in the second design, what did you make the drop tower out of? Also, how tall was the drop tower and what was the diameter

@TMartScience 4 ай бұрын

4" PVC pipe... height was dictated by the contest rules.

@krishivray 5 ай бұрын

So we built almost the exact same thing, but we attached a plunger sort of seal at the base of the 4 inch pipe and for the weight, we took a pvc end cap, stuck it together with a 3 inch pvc pipe, and put a rubber gasket around it to create a seal so when the weight drops it would push all the air to the ping pong ball, but it’s not going anywhere, only around 2 m for some reason, do you have any advice to fix this?

@krishivray 5 ай бұрын

And my launching pipe, that juts out to the side is 1.5 inches in diameter

@krishivray 5 ай бұрын

@TMartScience 5 ай бұрын

What is the diameter of your barrel?

@krishivray 4 ай бұрын

The launching pipe is 1.5” in diameter while the bigger pipe is 4”, we also got it to launch around 5m, but it won’t go any farther than that

@TMartScience 4 ай бұрын

You may be getting an early release of the ball... that is what the vent holes were for....@@krishivray

@krishivray 4 ай бұрын

Do u have any advice on where to place them to maximize distance but to not let out too much air?

@TMartScience 4 ай бұрын

@@krishivrayyou have many experiments that need to be run... if you make too many holes, you may always cover them up with a strong tape...

@krishivray 5 ай бұрын

@minecraftnovels 4 ай бұрын

drill holes in pvc, watch in slow mo exact time ball launches out of the pvc

@kathrynw.1743 5 ай бұрын

Hey! I was wondering what weight you used for the second design? How much did it weigh and what material did you use? Thanks’

@TMartScience 5 ай бұрын

We made the weight by putting all the fishing weights we had in the garage into a metal can that was wrapped in tape until it fit the pipe. BE CREATIVE!

@Benleiy 5 ай бұрын

Hey, thank you so much for your video but, i was just wondering is there any actual correlation between the labeled numbers you made? Or is it rather just an indication of each possible drop point in your 2016 piston design and through experimentation you can personally figure out the combinations for levels and angles for a desired target? Thanks in advanced

@TMartScience 5 ай бұрын

The numbers are just for reference and repeatability, nothing takes the place of experimenting and practice

@arnavnanda4392 5 ай бұрын

Hey, fantastic video- I was wondering how you configured the laser to predicate where the ball will land. It's something we are struggling with

@TMartScience 5 ай бұрын

Practice, practice, practice... This was all done experimentally

@savoryseaweed495 4 ай бұрын

Yeah like if you increased the drop height then wouldn’t your laser pointer be way off. Wouldn’t you have to constantly change the laser p.

@TMartScience 4 ай бұрын

@@savoryseaweed495 That's why you need lots of calibration test shots. So you know where to point it for each drop

@TMartScience 4 ай бұрын

@@savoryseaweed495 Yes... that is why you practice it first.... figure out where to point the laser for each desired distance. It takes a lot of trial to calibrate the set-up

@cow1723 5 ай бұрын

Does diameter affect the airflow? We used a 3 inch pvc for the weight to go into with no holes drilled and it didn't go very far. How can we make it go farther?

@TMartScience 5 ай бұрын

Yes diameter matters...air flow and compression is essential

@cow1723 5 ай бұрын

@@TMartScience Yes, but I was wondering how we could make it go further, as it only goes around 2 meters.

@TMartScience 5 ай бұрын

@@cow1723 we used a 4 in PVC pipe for the drop tower, the combination of holes along the side allowed air to escape until a final compression burst. This along with carefully sized and fitted barrel was essential for getting the distance

@cow1723 5 ай бұрын

@@TMartScience Thank you for the answer, really appreciate it. Just wondering, but what was the distance between each hole?

@TMartScience 5 ай бұрын

@@cow1723 you may need to experiment with this... Like I have noted elsewhere, rules and requirements change from year to year. This was as built 9 years ago and I no longer have the device

@user-et6gj3qk3j 5 ай бұрын

Hey ..Really nice video. ..How did you inflate the beach ball, cant seem to figure that out..and How do you keep the beach ball from deflating once you fill it up? Did you have to use special valves?

@TMartScience 5 ай бұрын

Ball was inflated with a trash bag filled with air, held over the barrel

@shreya.n 5 ай бұрын

Hi, good video but I have a question. For your 2016 design how did you make you ball go a farther distance because i am using your same design but my ping pong ball is only ping about 1 meter. so what should i do to make my ping pong ball further. also did you use any lining on the bottom of your design to stop a loud noise from the weight?

@TMartScience 5 ай бұрын

This has been answered with other comments... Diameter of the barrel is important, as are vent holes on the side.... some cloth or rubber on the bottom can cushion the landing.

@lolima9986 5 ай бұрын

great video! i was just wondering how long each of these took to build, from the planning to finishing the actual build and doing testing? i am just looking for a rough estimate of things to make sure im not behind for the competitions.

@minecraftnovels 4 ай бұрын

2 weeks building, then adjusting 2 months

@Cube_In_Space 3 ай бұрын

I was able to build these design very quickly talking less than a week for both

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