pzkpfw

Senior Members
  • Content count

    464
  • Joined

  • Last visited

Community Reputation

191 Excellent

About pzkpfw

  • Rank
    Molecule

Profile Information

  • Gender
    Male
  • Location
    New Zealand
  • College Major/Degree
    B.Sc. Computing
  • Favorite Area of Science
    I.T.
  • Biography
    Born, grew, living, working.
  • Occupation
    Self employed programmer.

Recent Profile Visitors

6046 profile views
  1. https://en.wikipedia.org/wiki/Pareidolia Pareidolia
  2. They were predicted by theory, before observation was made; that's pretty strong stuff. Also, existence of a literal singularity is not considered fact. The idea of an infinitely dense infinitely small mass is mostly pop-science. All that's needed for a black hole is for its mass to be within a certain size, not necessarily a singularity. So "another fundamental force preventing the formation of a singularity" would not actually disprove or prevent black holes.
  3. Trump is the most smart American.

    Trump started by being given a large sum of money by his Father. By some estimates, his current wealth is no greater than if he had simply stuck that money in a bank account. The idea that he's a great businessman is a myth. One thing he is good at, is self promotion.
  4. Freefall acceleration: 9.8m/s/s = 9.8m/s^2

    Don't want to push a dead topic but another thing occurred to me just before the previous post and I wanted to get it off my chest, that is, to show algebraically how the .../s/s becomes ...s^s. The thing to remember is that A/B = A x 1/B So m/s/s = m/s x 1/s = (m x 1)/(s x s) = m/s^2
  5. Freefall acceleration: 9.8m/s/s = 9.8m/s^2

    Consider what the "/s/s" means. It's "per second per second". That equates to "per second squared". (A second is a measure of time, it's not (by itself) a measure of speed. (Velocity implies direction).)
  6. Freefall acceleration: 9.8m/s/s = 9.8m/s^2

    It is just math. e.g. 20/2/2 = 10/2 = 5 20/2^2 = 20/4 = 5
  7. Mass and weight (yr 11)

    Just to have a go at putting this into words: You can think of mass as a measure of the "stuff" in something. Say you make a ball of lead that you weigh as 6 pounds on your bathroom scales. There's a certain number of Pb atoms in that ball. If you take that ball - and your bathroom scales - to the Moon: with its 1/6 surface gravity compared to Earth you'll now measure it to be 1 pound. But all the Pb atoms are still in the ball. None of them vanished. The mass of the ball is what stays the same, it's the weight that varies, based on the strength of gravity where the measurement takes place. To take it to the extreme, consider dropping the ball and scales off in space. The scales might measure zero ... the ball is "weightless" - but again, all the lead atoms are still in the ball. It doesn't have zero mass. e.g. It would still take force to push the ball, to accelerate it to some speed.
  8. Cross posting is considered rude/spamming in most forums.
  9. I have difficulties understanding relativity

    It's not really about the clock. It doesn't matter if the clock is a wind-up wristwatch, a battery operated quartz crystal controlled digital watch, a sand-filled egg timer, the beating of someone's heart, or the regular drip of water out of a small hole. It doesn't matter how the clock works, as long as the clock measures time, and time is affected, the clock is affected (from the point of view of some observer moving relative to that clock, or at some other gravitational potential).
  10. Taiwan Earthquake

    Can even be directional: http://www.ancient-origins.net/ancient-technology/incredible-earthquake-detector-invented-nearly-2000-years-ago-001377
  11. Small nitpick: first-line indents

    Personally I hate indenting (first lines of paragraphs) and just stick a blank link (or depending on line spacing used, half a line) between paragraphs. Does your institution/supervisor have a style guide? I recall pages and pages of instruction on citation formatting, do they say nothing about the text itself?
  12. That science is about proving things. That science doesn't know everything about something, so any idea about that something has equal weight. The misuse of "theory" (as in "Evolution is only a ...").
  13. why lepton?

    Like most forums, you get an automatically assigned group or type name. The exact names depend on the forum, these are sciency ones. It'll change as you make more posts; look at different people, their post count and their title. Never to be taken seriously. (Unless it says "moderator" or "administrator").
  14. 3 Choices, pick one:

    I was thinking not just how we'd screw it all up again afterwards, but how these hypothetical aliens dealt with the issues of now. As in, would they kill 50% of us, and force the survivors to live a pre-industrial agrarian life. Would we choose option 1 then?
  15. 3 Choices, pick one:

    Exactly how would 1 be accomplished? That would affect whether it's a good choice.