- 132
- 915 175
TMartScience
Registrace 2. 11. 2011
Educational videos focused on Earth Sciences (Geology, Meteorology and Astronomy) and occasional videos related to ceramic art
How to play Jackknife
How to play Jackknife. This game involves flipping a pocket knife (jackknife) to earn points. It was played on the front steps of school during recess in rural Lancaster Co PA in the 1940s.
zhlédnutí: 299
Video
Divide to Delta
zhlédnutí 287Před 2 lety
Small scale exploration of stream and river erosion and deposition geology from a divide to a delta. Video acquired during minor flooding event in November 2020 near Haw River State Park in North Carolina
Neighborhood SS
zhlédnutí 452Před 3 lety
COVID Pandemic response to teaching the scale of the Solar System. Solar System walk activity with-out the walk...
Mineral Identification - Hardness
zhlédnutí 2,1KPřed 3 lety
Overview and procedure for testing mineral hardness.
Mineral Identification - Streak
zhlédnutí 4KPřed 3 lety
How to use color and mineral streak in identifying minerals.
Aurora
zhlédnutí 228Před 3 lety
Brief description regarding the formation of Auroras, comparing their formation to the function of a CRT TV screen.
Conglomerate
zhlédnutí 3,9KPřed 4 lety
TMart Science Geology Series of rock types. Sedimentary Conglomerate
Mineral ID birefringence
zhlédnutí 1,8KPřed 4 lety
A description of mineral birefringence or double refraction.
Wyoming Stromatolites
zhlédnutí 741Před 4 lety
Looking for Stromatolite fossils in the Snowy Mountains of Wyoming
Science Olympiad Air Trajectory
zhlédnutí 28KPřed 4 lety
2015 and 2016 Norther Guilford HS Science Olympiad Air Trajectory cannons.
Exoplanet Detection
zhlédnutí 272Před 4 lety
Introduction to Astronomy lab about detecting exoplanets.
When I was a kid camp counselor was college student thought us things like geology good memories lol
Just remember the ones doubting this are just trolls so don't waste your time responding
Great explanation sir❤
Those rocks 🪨 are floating!
❤
ब्रेसिया
Very well explained
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?❤❤❤
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?
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.
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!
Do you 'know' or assume a flat earth? If you 'know' would you consider sharing with us the empirical evidence supporting the flat earth?
@@marcg1686 "Do you 'know' or assume a flat earth?" I know, that this world is oriented horizontally, and is completely stationary! - I do NOT use the term "flat earth" anymore! "Earth" is, what you call the so called "planet", which you think, you live on! And "flat" is often associated with smooth flat, not level flat, and that makes the use of that word misleading too! The evidences, are the facts of this world, which clearly shows us, that we do NOT live on a "globe" shooting through a vacuum of "space" in 3 different directions at once, at incredible speeds, while rotating. There's exists NO evidence of such an impossible unrealistic reality!
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
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.
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.
@@marcg1686 This would be true only if Syene and Alexandria are in the same longitude and different latitude.
@@yuminghu No. At local apparent noon the shadows will be at their shortest. At any longitude anywhere on the globe. On the June solstice the change in declination for the whole day is 0.2 minutes.
Thank you very much, what is the name of the coring please?
I didn't understand how he found 7 degrees from the pole to the sun ray?
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.
I found another video in the recommended that explained it in a better way, thanks anyway for the quick reply@@TMartScience
Great vid
you sound cold as fuck, respectfully
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!
How did u make the mass to drop down the 4 inch pipe?
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.
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.
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
👍👍
Hello, how did you figure out where to drill the vent holes?
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
Nice
I always thought of Australian Opal as a Mineraloid rather than a Mineral .
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.
A+....thanks for field trip
Can you tell me every single material you used to build this
For the 2016 version it would be really helpful
I want to build the exact same thing for my state competition
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.
Yeah, I know but it would be really helpful if you could tell us. I would really appreciate it.@@TMartScience
@@sahasmalla2844 look at the device, and make it better! There is a lot that I would do different next time around...
Great video. Thanks for sharing this knowledge.
UV light, particularly the shorter wavelength UV, is extremely harmful to skin and eyes. It breaks DNA and could cause skin cancer.
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?
Have you drilled vent holes
no, but the mass is sliding down with no problem@@TMartScience
@@__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.
Hello, how tall was the drop tower in the 2nd design?
It was as tall as competition rules allowed...
@@TMartScience for the second design, did the mass just drip to the ground and the ping pong ball would be launched right away?
Also, what does the protractor do in the second design?
@@PegasusPlayzYT the protractor has a string and weight to precisely set the launch angle
@@PegasusPlayzYT I don't understand your question
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😂
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.
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
Did you found an ideal weight of mass? we made mass with concrete and fishing weight.@@TMartScience
How tall is your 4" PVC? Could you explain the locations of the air vents?
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
thank you
Hi! How did you connect the beach ball to the pvc in your first design? Thank you!
Hi! How did you connect the beach ball to the pvc in your first design? Thank you!
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.
Hi! How did you connect the beach ball to the pvc in your first design? Thank you!
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
Thank u LOL
👌
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?
It depends on your fitting, you could use either one
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)
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.
@@Uman_i exactly correct
Also, Would it be possible to loan or buy the weight from you?
@@vedant-n5e It really is not difficult to make... That is the point of Science Olympiad! Experiment!
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
So with the pvc design you need to put vent holes in order for the ping pong ball to not come out prematurely?
Hi! What was inside the pvc tube in the drop tower as an air chamber for the falling mass to hit it?
Nothing... Just air
@@TMartScience so the mass just fell to the bottom and the ball would be launched?
@@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.
@@TMartScience how does the design have good consistency with the ball?
@@PegasusPlayzYT fewer changes in starting conditions= more predictable results
what brand raquet ball are you using? I have been struggling to find a ball that fits my 2.25 in barrel
I don't remember... It took a lot of trial and error to find one that fit
Nice!!! Super cool
Hey is there anyway you could link the laser pointer STL file
this was designed on tinkercad freeware. It would be easier to build yourself depending on the size of the laser that you have.
Of course thank you so much
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
4" PVC pipe... height was dictated by the contest rules.
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?
And my launching pipe, that juts out to the side is 1.5 inches in diameter
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?
What is the diameter of your barrel?
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
You may be getting an early release of the ball... that is what the vent holes were for....@@krishivray
Do u have any advice on where to place them to maximize distance but to not let out too much air?
@@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...
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?
drill holes in pvc, watch in slow mo exact time ball launches out of the pvc