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kenny1999

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Everything posted by kenny1999

  1. What if not? This is why I started the thread.
  2. So, even if someone only focuses on cost and makes something poorly, a cheap bluetooth device shouldn't emit exccessive radiation than a decent one, is that right?
  3. For a long time, it's said bluetooth could cause cancer which is something I don't believe because if that's the case, it should have risen concern by the general public. However, I hope this is not a stupid question. What if a bluetooth device is made very poorly for sake of reducing the cost, or if it is made by an unqualified someone or factory, would it increase the any health risk to the end user? Or that said, is level or amount of radiation emitted relate to the how well the bluetooth is made?
  4. Hi, ok, well, I have one more conceptual question. For example, when I am pushing a toy truck such that it is accelerating, I know that net force on the truck isn't zero, but at this time, is the force my hand gives to the truck equal to the reaction force that the truck gives back to my hand?
  5. So, does reaction force only exist for the moment they touch each other?
  6. We know that if something is fixed to the ground and we give force to it, then it will give reaction force in equal amount. How about if "something" isn't fixed, e.g. a toy truck? When we push it for an instant, does the toy truck at the same time give reaction force back to the us? Does it only give reaction back for the time they touch each other? Is my concept correct?
  7. I have a job offer that requires working overnight and there is no shift, so practically I can only sleep in the daytime. I have been hearing a lot of opinions that working overnight is really bad for health in the long run. In fact, is there any scientific evidence or study which suggests that it is possible? Or is it solely an unproven belief?
  8. Is plastic e.g. polyproylene, polystyrene etc mostly inert to most substances at room temperature? I only know that plastic does not like heat.
  9. under the condition that they are not allowed to talk so that you don't know their accent. Is it possible to make a promising guess through their biological appearance i.e. not their dressing style and what would that be?
  10. What's usually the major difference? Could cheap wine be made through less expensive processes or costs so that the wine is less beneficial or even more damaging to health? I understand that wine isn't generally considered to be good for health after all.
  11. I really wonder if there is any street camera in those African countries to look at the people around.
  12. It's easy to name a few powerful countries on the earth from the Google search that they have the most cameras in their countries. However, I can hardly find out any information about which country in the world has the least survelliance by all means, e.g. cameras in the street, surveillance on the internet activities.
  13. because they should also experience enough dry air and nose pickling.
  14. Only the specialist gave me a simple treatment and asked about my medical history and family history but I wasn't given any comment on whether it is common for an adult. Asking many non-doctors will certainly help, since none of them said that they had nosebleeds, it suggests to me that dry air and nose pickling shouldn't be the cause of nosebleeds.
  15. Dry air, nose picking are common conditions that happen to almost everyone if these are considered to be the common causes of nosebleeds in adults. What's the problem of asking many people for reference while at the same time I also saw a doctor and specialist? My nosebleed doesn't happen every day, but it happens once every a few months, without any immediate cause I can think of.
  16. Did you mean nosebleeds in adult are common? or at least, not uncommon? As I said, my nosebleeds happen at random times of a year, so I think dry air shouldn't be a cause. Sometimes I am outside for a whole day in the dry wind but I don't have any nosebleeds, but sometimes when I am indoor I could suddenly have nosebleeds.
  17. As far as I remember, I did not have many nosebleeds when I was a teenager. But since 10 years ago, when I was 24, I first started to have nosebleeds which are usually spontaneous, I cannot remember if my nose was once injuried, but even if it was, it shouldn't be anything serious because I never saw a doctor for nose injury. 5 years ago, I saw a doctor, I was advised to a specialist where some simple checks and treatment were done and for the next five years, I didn't have any nosebleeds until recently, it comes back again. There is no pattern for my nosebleed to happen, it could happen in the spring, summer or winter so dry air shouldn't be a reason. Yes, I like picking my nose but I just do it gently and normally. However, I have asked many adults, none of them said they had any nosebleed after their teenage. A registered nurse from a reputed site told me that if it was an ongoing problem of several years, unlikely anything serious because more severe symptoms should come up soon. Could nosebleed have no cause but it just happens to an adult? But I have really asked probably more than 100 adults and NONE of them told me that they had nosebleeds.
  18. Not really a big question. I am only asking for what kind of paste/oil is advised to be used with a piece of wood with unfinished surface
  19. Yes, I have a piece of unfinished wood that I really care and have to be used frequently. However, I don't know exactly what kind of wood it is, what is recommended to apply (and is it difficult?) that should do it for most different woods?
  20. Some products made of wood are finished with a shiny wax coating that I think it's perfectly fine to wipe them clean by water or other cleansers. But we know that there are also some other products made of wood but they are seen to be without any coating. Is it good or bad to clean such wood products without coating? Could the chemicals slowly get inside the wood can age or wear it faster?
  21. We know that convex lens converge light at a point, Is there any other shapes that could also converge light? What if a convex len has only one side circular while the other end is flattened, when the incident light enters the circular side, what will be the transmitted light?
  22. Am I asking you? I didn't even know you exist, and your "wife and children". That I am asking questions here is none of your business.
  23. But what's the difference between the 99% one and the 100% one? The 100% one is almost double the price of 99% one for the same amount of net weight under the same brand.
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