• Is time travel possible?

    12 answers · 1 day ago
  • What causes size?

    13 answers · 4 days ago
  • What's the scientific answer for 'If a tree falls in the forest, and nobody is there, does it make a sound?'?

    What would scientist's say, yes or no? I'd personally say yes as since sound always has a medium on Earth to travel through, even if nobody is there it still would.
    What would scientist's say, yes or no? I'd personally say yes as since sound always has a medium on Earth to travel through, even if nobody is there it still would.
    8 answers · 2 days ago
  • Is climate change real?

    Best answer: Take a look at history of recorded information i personally remember having ice rinks every year for weeks now it barely gets cold enough to freeze for a day two


    That alone only happened in 40 years time


    I wonder what the changes are over centuries or milenia
    Best answer: Take a look at history of recorded information i personally remember having ice rinks every year for weeks now it barely gets cold enough to freeze for a day two


    That alone only happened in 40 years time


    I wonder what the changes are over centuries or milenia
    20 answers · 5 days ago
  • I’ve asked this question 3 times I am thankful for the helpful equations but can somebody please give me the correct answer!!😭😩?

    A 5.4 g bullet leaves the muzzle of a rifle with a speed of 523.4 m/s. What constant force is exerted on the bullet while it is traveling down the 0.5 m length of the barrel of the rifle? Answer in units of N.
    A 5.4 g bullet leaves the muzzle of a rifle with a speed of 523.4 m/s. What constant force is exerted on the bullet while it is traveling down the 0.5 m length of the barrel of the rifle? Answer in units of N.
    5 answers · 14 hours ago
  • In that circuit what is the equivalent resistance considering the current conventional?

    In that circuit what is the equivalent resistance considering the current conventional?

    I calculated it 9.3 ohm am I right?
    I calculated it 9.3 ohm am I right?
    6 answers · 2 days ago
  • What is the Archimedes’ Principle?

    Best answer: Watch this
    Best answer: Watch this
    5 answers · 23 hours ago
  • When was the hydrogen bomb dropped?

    5 answers · 1 day ago
  • Why were thermionic devices/vacuum tubes unreliable?

    Best answer: Heat, overall power use, size, manufacturing cost and high voltage requirements were (and are) the main problems. A portable device had to have two batteries; a relatively large low voltage one for the valve [tube] filaments plus a high voltage one for the actual electronics. Some gear also had a third... show more
    Best answer: Heat, overall power use, size, manufacturing cost and high voltage requirements were (and are) the main problems.
    A portable device had to have two batteries; a relatively large low voltage one for the valve [tube] filaments plus a high voltage one for the actual electronics. Some gear also had a third "bias" battery.


    Reliability was not really all that much of a problem as the equipment they were in was usually designed for easy valve replacement. Other components often caused as many reliability problems as the valves themselves.

    Early valves were not that good as the techniques needed for them to work well and have a long life were still being developed.

    Later manufacturing techniques vastly improved reliability and some gear used miniature valves that had thin flexible leads and were soldered in place like transistors rather than plug-in style valves that need sockets.
    eg. http://www.saturn-sound.com/images%20-%2...


    Transistors are vastly smaller, take less power, do not need high voltages - and most importantly, they can be mass-produced; a single silicon wafer can contain thousands of individual transistors or millions to billions of transistors as part of integrated circuits.
    4 answers · 6 hours ago
  • Physics Problem please?

    What volume of water has the same mass as 120 cm^3 of gold?
    What volume of water has the same mass as 120 cm^3 of gold?
    4 answers · 12 hours ago
  • As you approached the center of Earth, wouldn't the gravitational force tend to infinity?

    Because then your r^2 value is tending towards 0. And what if you were at the exact center in a perfect sphere? Of course, the gravitational force is 0, but how can you mathematically prove that using newton's gravitational equation?
    Because then your r^2 value is tending towards 0. And what if you were at the exact center in a perfect sphere? Of course, the gravitational force is 0, but how can you mathematically prove that using newton's gravitational equation?
    10 answers · 4 days ago
  • Most efficient way of time travel currently?

    What's the most efficient way of time travel currently? How can it be achieved? Can the nature of space provide time travel? (P.S. Sorry I'm not good at science and don't know much, so going to use anonymous, please don't hurt me!)
    What's the most efficient way of time travel currently? How can it be achieved? Can the nature of space provide time travel? (P.S. Sorry I'm not good at science and don't know much, so going to use anonymous, please don't hurt me!)
    6 answers · 3 days ago
  • Aren't you glad that I have found the solution to global warming?

    Best answer: You have a place in USA politics young person. This is exactly the sort of thing that the current EPA is looking for. Although it is hush hush I had heard that they were considering a different approach. The concern about nuclear war was that it would precipitate a global winter. So by increasing the global... show more
    Best answer: You have a place in USA politics young person. This is exactly the sort of thing that the current EPA is looking for.

    Although it is hush hush I had heard that they were considering a different approach. The concern about nuclear war was that it would precipitate a global winter. So by increasing the global temperature it then gives an excuse to drop a few nukes here and there around the world. "We did it to save the planet from global warming".
    Another sensible and rational solution to the problem.
    7 answers · 4 days ago