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Hey @davenn, you really have an intriguing hobby! As many others have said earlier, I imagine it would be really amazing to hold something from space right in your hands! But I am wondering, how do you differentiate, how do you know that the rock you find or buy is really a meteorite? I have...

This all just shows how history tends to repeat itself. Lessons, as much as mistakes, are forgotten in just 2 generations, 80 years, and all the vices and evils come flooding back. Russians says that it is time to remind the West and Europe of what happens when red lines are crossed and refresh...

Well, well. Very interesting and valuable results in the poll. I was hoping for quite a few votes, very good results. I voted for Whatsapp, which I use very often on a daily basis to text friends about school work. Snapchat, well, I have it for the same thing: to text friends, but I find that it...

Please vote what social media accounts you have and use in my poll. I was always interested in what social media is the most popular, and want to experiment in the small community of PF. You can choose multiple from: Facebook, Twitter, Instagram, Snapchat, Whatsapp, Youtube, Google+, Pinterest...

You are correct and I share your opinion. However, I believe that it would be the interest of the younger students to challenge themselves mathematically and develop themselves. Even if other people solve them first, students can still discuss the question, solution, answer and always have a go...

Thanks

aliexpress.com ebay.com banggood.com anywhere fast; from China. :)

@fresh_42 @Greg Bernhardt . I (for my young age) find that these problems are very alien,difficult to me, as I am only in year 8 :) . However, I would really enjoy to take part in a similar challenge, but much easier, like a high school level, however still challenging and interesting for such...

Wow. You guys are so smart... :bow:

Yes. Why?

The area changes, the length of the AB and CD changes, the length of the legs does not change, the height does not change, all the angles do not change. Yes, I thought about it for a long time, and drew a sketch.

The hypothenuse - I know. I also know all of the DC segment, however I am not sure what the DC-base side of the triangle is exactly. Do I? So, I can find a trick (is it not too hard? :)

Hello. I am wondering how I can find the area of a trapezoid from its two legs and bases. My problem: ABCD is a trapezium with AB parallel to CD such that AB = 5, BC = 3, CD = 10 and AD = 4. What is the area of ABCD? If we trace a straight line from A down parallel to the height of the...

Pirates of the Caribbean, Harry Potter, Star Wars and other in other languages.

RIP.

We could use chess, but it might not be practical for all the reasons mentioned. It is just like this photo from Wikipedia with a world-class boxer losing in chess against Vladimir Kramnik (World No 3, currently). It would be fair to have a boxing round next! :smile: That's why I asked for...

Massive Space Structures Have Surprising Connection to Quantum Mechanics Math Reading my daily science news I came across an interesting article that talks about how massive space objects have unexpected relationships to quantum mechanical mathematics. I was quite surprised to hear this, as I...

That will be the day when PF will be a robot answering everything with Wikipedia uploaded into it and PF will not need an owner or the helping Mentors anymore...:frown:

I have been thinking about how to compare two men in their overall abilities. Physical, mental, strategical, social... So far, I have found that the game chess could be the most efficient way to compare two men on the strategical, mental and social sides of their personality. I wonder what...

I like to think of it in terms of achieving something not for the need to survive (like gathering food with animals to live one more day and escape from predators), but, on the other hand in terms of a want not a need. Like I don't have to win the Nobel Prize in order to get money to buy a loaf...

Hello. I know that many humans have lifelong goals, like becoming an engineer, winning the Nobel Prize or something. But do animals have the same? I understand that the goal of all living things is to give a successful and prospering offspring, but do animals and living things other than us have...

Some everyday things might get really complicated...

My father used to study and research Supersymmetry. We were talking, and he was saying that the field is dying out. Now, he studies dark matter and energy with another professor. Just what he told me.

We need to get ready for the encounters, in my opinion. If we encounter ET (like us) tomorrow, then we will most likely go mad. War will break out, instability could destroy us and all the scientists will go mad.

I don't think it will cost 500 dollars. on average - 300. Ok, then you have your idea. Go with that.

Then, buy a router, powerful router (to be able to reach whole house), and get unlimited internet on it with Optus or something. Or, you could always ask your mother to get a 10Gig plan on her phone, your father to get a 10Gig plan on his phone and yourself too, so you have 30G a month + data...

Over Antarctica! Interesting!

You could connect the ethernet in the kitchen to a router (they cost no more that AUD100) and stream the whole house. Or you could research what internet or service provider owns that ethernet and ask for more speed and stuff.

I have asked my father the same thing. He answered that there are no 'unlimited' cellular data plans.

Now it is heading towards Mars. (Has this been posted yet? Sorry if so.) https://phys.org/news/2018-02-spacex-world-powerful-rocket-mars.html

I like that it brings different people from different countries together towards one goal.

8/15. :(

What do you enjoy/like about mathematics? Let me start: I enjoy the beauty of mathematics and how beautifully it describes the World. You? Feel free to post equations. Thanks.

Good luck with testing!

Do you think these sites are legal? I really doubt that, since it conflicts with the education standards and protocol, probably. How are such pages not blocked or deleted by the government?

I have noticed that even Isaac Asimov in the Foundation Trilogy talks that nuclear power is the future, regarding science and electricity. What do you think?

Can you post any links in particular?

So you just have to get involved? I like it!

Ok, I was just curious what is going on. Thanks, Greg.

Yes.

Dear PF. Sometimes when I reload the PF page for updates, it reloads, I think, basic HTML. This happens also with other pages, like Gmail. Why could that be? Is it a server/browser error? It only happens sometimes and when I reload the page again it is good. Thanks. I.

I am reading "Forces of Nature" Brian Cox and Andrew Cohen. https://www.google.com.au/search?q=%22Forces+of+Nature%22+Brian+Cox+and+Andrew+Cohen.&oq=%22Forces+of+Nature%22+Brian+Cox+and+Andrew+Cohen.&aqs=chrome..69i57.237j0j7&sourceid=chrome&ie=UTF-8

I think OP is referring to "Since they are constants, the definition of constant itself states that a constant is something that doesn't change, how can they change?". I think that is the OP's question and a question that interests me as well. Thanks.

Sound. I didn't know that! Why? I always thought it would be instantaneous.

Hello. I have been thinking on faster than light things. I thought about: chemical engines, lasers, wormholes... All that kind of cool, advanced physics. But, I stumbled on faster than light mechanical actions. I thought about a lever: first class, if you wish, if you apply a force to one side...

The article on the website simulated me to think on the topic and it seemed pretty reasonable to me.

This AI technology will be utilised by everyone. Any company that ignores it will not stay competitive on the market, similar to the internet boom. AI will be used by everyone from the companies to detect weaknesses in their systems to self-driving transport. Any major technology company that...

I am trying to discuss something interesting that I came across. It was interesting to hear an opinion of educated people on the topic. I am sorry if I offend anyone, but I did not intend to give anyone any advice they do not wish.

I have been reading a fool.com report on the AI financial BOOM: After clicking on the "No, I want to learn more." link on the bottom of the tease article and after entering your email, it will give you a video to watch on the topic and some more information by email. Do not hesitate to click...

Isaac Asimov by any chance? The power of science...