Random Science Questions

Q: What is the result of finding the limit of secant lines?

A: Tangent line.

Q: What is a qubit?

A: Qubit is short for Quantum Bit.

Q: What is the approximate wavelength of a gamma ray?

A:  The wavelength of a gamma ray is less than 10 picometers, or 1012 meters.

Q: In probability theory, what is the meaning of ‘independence’?

A: Two events are independent if the probability of one event does not affect the outcome of the other event.

Q: What is the SI unit for angular velocity?

A:  The SI unit for angular velocity is ‘radians per second’. Angular velocity is sometimes referred to as ‘rotational speed’.

Q: What is the derivative of f(x) = sin x?

A:  The derivative of sin x is cos x.

Q: What is the limit of 1/x as x approaches zero?

A:  The limit of 1/x as x approaches zero is infinite.

Q: What is Planck’s constant?

A: h = 6.62607004 × 10-34 m2 kg / s Js

Q: What is the chain rule in calculus and why is it important?

A: The chain rule, in calculus, is used to determine the derivative of a composite function. For example, the derivative of f(g(x)) is f'(g(x)) * g'(x).

Q: What is Newton’s second law of motion?

A:  F = ma (force = mass x acceleration)

Q: What is the more common term used for

      “Atomic electron transition“?

A:  Atomic electron transition is often referred to as a ‘Quantum Leap’.

Q: What is the Rydberg constant?

A: 10, 973, 731.6 m1

Q: What is the Rydberg formula for hydrogen?

A: 1/λ = R ( 1/(n1)2 – 1/(n2)2 ) . R is the Rydberg constant mentioned in the previous question.

Q: What does this equation mean, and why is it important?
E = mc2

Q: What is the speed of light in a vacuum?

A:  The speed of light in a vacuum is 299,792,458 meters per second (m/s).

Q: What element of the periodic table, and what isotope of this element, is used to define the SI unit ‘second’?

A:  (Cs) Caesium-133.

Q: What is the term used to describe a system of ordinary differential equations that do not depend on the independent variable?

A: Autonomous

Q: What is the third axiom of probability?

Q: What are the seven SI base units?

A:  ampere, candela, kelvin, kilogram, meter (metre), mole, second

Q: What is a farad, and why is it important?

Q: What is the formula for calculating the terminal velocity of a falling object on planet Earth?

Q: What is the photoelectric effect?

Q: What is an atomic orbital?

Q: What is the escape velocity of the Earth?

A: 11.2 km/s

Q: What is the difference between a covalent and an ionic bond?

Q: What is a joule?

Q: What would be the immediate result if the Earth’s gravitational field suddenly disappeared?

Q: What is the gravitational constant?

A: 6.67408 × 10-11 m3 kg-1 s-2
Note: Other examples using force, Newtons, to describe the gravitational constant are similar.

Q: What is a BTU and what SI unit does it use?

Q: What is the first law of thermodynamics

Q: What are the three naturally occurring isotopes of Hydrogen?

Q: What is Ohm’s law?

Q: What is the difference between AC and DC?

Feel free to comment below.

60 thoughts on “Random Science Questions

  1. Wow. I’m a behavioral sciences, psychology and music person. I leave the science and math to my oldest daughter and her dad. However, I do work in a middle school and so I’m familiar with the words used in each question. I can’t answer them but I have heard or seen them.

    If this site is to help students with science you’re off to a good start. It looks like something I could refer students to. But at the same time it seems like it will be fun once the interactive components have been added. If it’s going to be similar to Brain Pop then it will be great.

    Lastly, I like the page called “Stuff”. That’s kind of how science is sometimes because of all the experiments that can be done and items used for tests.

    Nice job.


  2. Hi, this is interesting and intriguing. So many questions but what about answers? Do you really think people will follow what you suggest and put answers in the comment box. It will be interesting to see if this happens. I see most of questions could be classified as physics, a couple of mathematics. Perhaps grouping them would not be a bad idea. Many thanks, I am a physics so naturally I like to see such stuff.


    1. Hi Jovo. Thanks so much for the comments. I will be developing this page further, and it will become far more dynamic and interactive than it is now. Answers will also be provided. For now I’m just putting together as many questions as I can come up with. Computer Science is my field, however, I’ve never lost my interest in physics and math. Thanks again!


    1. Hi. Yes. I think that would generate a lot of interest. If you create your own website, with the English-Russian dictionary as the main feature, and add new content/translations daily, you will definitely be able to generate income.


  3. Hi,
    Amazing! Not just the reminder you’ve just given me of so many Physics/Chemistry terms, but also the fact that I’ve actually forgotten much of the concepts behind this great facets of scientific reality. O how time flies!
    E=mC^2 Has something to do with Energy being equal to a constant multiplied by the square of the speed of light. Right? I know not!


    1. Hi Boniface. You are correct. Energy = mass x the speed of light squared. Sometimes, this is referred to as ‘energy mass equivalence’.


  4. Hi Doug, your site is brilliant , i love the freedom page it is the most original page to advertise Wa i have come across, short and straight to the point.
    I like the look of your site, the images are all eye catching especially on your stuff page absolutely superb!
    It really shows that you are passionate about your chosen niche , you must be a really clever person.
    Your site is easy to navigate around and i love the chice of subjects to choose from .
    An original site and i really enjoyed exploring it i hope you do well with it , it is one of my favourite sites i have had the pleasure of coming across ,take care.


    1. Thanks so much for the kind remarks, clive. I’m glad you like the site. I hope to make things more interesting going forward. All the best to you, my friend.:)


  5. Interesting page. You can probably make an interactive quiz, and maybe if the reader gets the questions right, then maybe it could unlock a special area of the site.

    This seems like a good page for anyone wanting to learn a few things about science or for students studying for a test.
    Nice job!


  6. How cool was that. It really got me thinking when i read all those questions. It was like making me question those things. I do know the answer to the last one however. Ac is alternating current and D/c is direct current. Are these questions youve found yourself intrested in?


    1. Yes, since I study math and physics, I have a natural interest in all these questions and more. I’ll probably separate these into separate pages or create some kind of interactive quiz.


  7. well, well a great page matey and I love the theme. Unfortunately the questions were of a too higher standard for me to answer but I like that you are putting them out there for all to see. I only knew a small % of the answers but I do not doubt that there will be people out there on the internet who probably know them all. You have a lot of questions too which will appeal to the masses I feel.


  8. I wish all the answers were put up. These science questions are very useful and could help students out. I feel like these questions are relevant and hopefully more questions will be put up! Nice site. Useful information that any physics student could use. Cheers to you. Very cool site.


  9. Whoa, all these questions make me think back to my honors physics days in high school. My teacher Mrs. Habib would know man. she is the smartest person I know! She is nice too but besides the fact that my physics teacher was awesome I learned a lot about movement and gravity. I actually failied that class though. Probably because I was 2 classes ahead of myself and I stopped trying.. but these bring back the memss


    1. Thanks Billy. Physics is the most difficult subject I’ve ever studied. I suppose I’ll be learning the rest of my life.:)


  10. I love the concept of this post.

    Not that I have ever thought about many of these questions but nonetheless it is definitely interesting and I love learning new things everyday.

    This could be incorporated in such a way like Forbes does with their “quote of the day” you could do a “science question answered of the day” or something like that!

    Freedom Weight Loss


  11. Hello Jovo,

    This is a terrific idea! I see in your comment responses so far, that you are building a very interactive site where folks with a scientific curiosity can both contribute and get answers to their questions. I can’t wait to see what you do with it, so I will be checking back periodically to see how it is going.

    There certainly are some very interesting books on many of these subjects (questions), are you planning to do some scientific book reviews I can read?

    Thanks again for being bold and putting together such a unique and intriguing site!



  12. Hi there,

    This is interesting ) I hope you can add more questions and fill some answers soon, though.

    Will astronomy science related questions be added to your list? I like to see several trivia about lightyear, bigbank, galaxy, etc.

    Oh yes, maybe add some random questions about bio-electro too? It is interesting to see those questions.

    Thanks for making me intrigued:)


    1. Thanks for the suggestions. I will definitely be providing answers to existing questions and posting additional questions.:)


  13. Gosh, I have to dig way back in the good ol’ brain to try and recall the answers to some of these… My head hurts already haha. What a fun and interesting page! I love the topics your site has. It makes a great learning tool. I will be eagerly awaiting the answers to all the questions. Great fun facts to pull out at a dinner. Maybe to impress?? lol


  14. Very interesting physics-related questions here. I must say that, although my college physics course was quite challenging, it ended up being one of my favorite courses as I found excitement in thinking through the problems and trying to come up with the right solutions. Since physics is heavily based on math, studying physics seemed to help me finally see how math is relevant to just about everything in our world. Sadly, I can see by going through your questions that I have forgotten quite a bit and need to brush up on my knowledge.


  15. I must say.. i have never understood science in a way of walking. Like science to some people is just as easy to them as breathing is to me. So if i walked up to someone and said “oh thats a qubot sized atom.” Would it make sense? It’s a very interesting analysis. I never heard of qubot. It’s pretty fascinating actually. Have you ever used this term? Where were you when you said it? Did you have a friend with you? Does he study science?


    1. Hi Billy. Yes, I have used the word “qubit”. If you study quantum computing, the qubit is the basic unit of manipulation. The entire field of quantum mechanics is mind boggling. There is a lot of probability involved. I used the word when discussing quantum computing with a co-worker. I’ve also used it in a network engineering class that I was taking. The concept is quite difficult to grasp. I still don’t fully understand it. Thanks for your questions and insightful comments.


  16. I have to say that physics and math have never been my forte. I did not know any of the answers to your questions and I am glad I came across your website since now I know where to go for questions related to science!

    This is going to be extremely helpful for parents who have kids since they can refer to your webpage anytime they have any science related questions. Interesting stuff, you must be a clever guy!


    1. I myself, am more of a math person. However, physics is a natural outgrowth of mathematics. I haven’t always known these answers, either. This has been a nice learning exercise for me.


  17. Hey! Very interesting questions you’ve posted, English is not my first langguage so i don’t undesrtand some of the words unless i translated them, some of them are preatty similar to spanish, I’ve been away from ´phisysc since collage so i think i don’t know the answer of any of these questions xD, It is good you wrote the answer for some of them. Cheers!


  18. Could you clarity what escape velocity is? Hence, when you say that the escape velocity of the Earth is 11.2 km/s, does this mean that the Earth is escaping the Sun’s gravitational pull at that speed, or that something needs to go that fast to escape the Earth’s gravitational pull? Thanks!


    1. The velocity that must be reached to escape the Earth’s gravitational pull is called escape velocity. Escape velocity applies to any object that is subject to the laws of gravity. Since the moon has a much smaller gravitational pull than the Earth, the moon’s escape velocity would be much smaller. I hope that helps.


  19. Hello here, I read few times your questions and was thinking, what it is about? I like to read a lot, but these things never reached me. It shows again, how little do we know.
    I am veterinarian by profession, but I was interested in quantum physics, some popular science, but these things for me as for Columbus America are new. By the way, Columbus did not discover America, but there is an other story.
    Thanks for confusing read for me, because I understand that I do not know anything in this area.
    All the best, happy writing.


  20. I’ve been researching Nicola Tesla and must have landed on your page somehow. I am glad to see there are others who are passionate about science and I love how you’ve posted these science questions here. They are random but what isn’t random these days- I guess quantum theorists would know better but I really like what you have done here. Do you have questions that are geared towards children? I would really like to turn my son onto your website but with baby steps


    1. I currently don’t have a children’s question page. However, I like the idea. I’ll try to get a simplified page up for children. Right now I am putting up some periodic table video songs that children may like.


  21. I love this page. Lots of great info here all in one handy little place. I could have used this in school. I took a lot of online courses, and the teaching isn’t as good without lectures. It made it quite difficult. I had to learn from what I called my – YouTube Teachers. Do you think you might ever made videos about the questions? Not sure what you have planned. But I like it.


    1. I’m not much of a video person. I prefer to read text. However, a video is a good idea. I’ll look into it. Thanks.:)


  22. Crikey, what a site. I hope it will progress into a site dictionary of scientific/physics/maths questions and answers. This will be very useful for students and somewhere to look for those spurious terms that you haven’t a clue about.
    I knew the answers to some of the questions and have also learnt about something new. You learn something different every day!
    It will be interesting to see how many of the unanswered questions will be answered in comments. Thanks for the info. Ches


  23. I found that you have interesting questions on this site, which brings back a lot of university lecture memories. How about click on the question on reveal the answers? To give the readers a couple of minutes to think about the answers.
    And how about links leading to science, maths books to generate income?


  24. I liked reading this post.

    Some times the rat race can leave ones brain feeling numb.

    As far as mathematics is concerned by ability just about stretch to basic differentiation and integration but developing my brain is something that I have been focusing on and your post is going to give me the motivation to learn more about mathematics and try to understand the nature of these questions.

    Thanks for this – this is valuable.


  25. Hey!

    I feel smarter just by reading this one page…maybe I can go on and teach physics in high school now.

    I noticed you didn’t have an answer to this question:
    Q: What is the chain rule in calculus and why is it important?

    Is it unanswerable or do we get a prize for answering it first😛



    1. I wish I could offer prizes for answering questions. Who knows, perhaps going forward I can implement something like that. I do have the answer to that question on another page. I’ll post the answer here. The chain rule is an important concept in calculus.


  26. A very interesting general knowledge article and it’s good that we can check what’s left of our knowledge gained during the school.
    I liked the question: “What would happen if there were no gravity?” Imagine what we’ll be?There are two ways in which you could lose the effect of gravity: by reducing the weight of the earth or by increasing rotation speed (now at 0.3% equator of reduced gravity).
    Indirectly you can ‘get rid’ of gravity through ascension.
    0.5% of all the equator than at the poles less gravity and the higher you climb, the effect increases.
    Defects are hard to see without a thorough study.
    In short: the shape of the earth because of reduced gravity may be irregular; as rarefied atmosphere; Instead people (and animals) would be taller.In addition to prolonged exposure to reduced gravity conditions will soften bones, joints and muscles will be weak will atrophy and lose some tone thus adapting to the new gravity lower,or such an event would have catastrophic consequences … mankind would have a small chance to survive.What would happen when you sneeze?
    Helpful!Thank you!


  27. What a great wee page, more answers to questions that I never thought to ask. In fact, some of the questions make me realize how little science. I actually know.

    But it is certainly wee goldmine of random answers to questions that actually do affect us.

    I have always been amused about descriptions of gravity, is quite honestly, we have no idea what it is or how it works. All we can do is describe how it affects us. It’s a bit like saying electricity is a bit Sparky!


  28. This is fascinating! I love learning stuff about physics!

    I did not know that the proper term for quantum leap was atomic electron transition. That’s really interesting.

    I couldn’t help but noticing that some of the answers are not there. Maybe I’m missing something. Is this a questionnaire for us kind of?


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