• I wish I'd studied. How to cram for a difficult physics exam in 15 minutes?

    Best answer: Go through the notes that you'd taken.
    If no notes, check the chapters that you'd studied.
    If no time for that, ask a friend.
    If no friends, then I'm out of ideas.
    Best answer: Go through the notes that you'd taken.
    If no notes, check the chapters that you'd studied.
    If no time for that, ask a friend.
    If no friends, then I'm out of ideas.
    15 answers · 3 days ago
  • What happens if you jump out of an airplane without a parachute and you land in water?

    Best answer: U DIE
    Best answer: U DIE
    14 answers · 2 days ago
  • Should I take physics, or genetics?

    7 answers · 1 day ago
  • Why is 4th law of motion still denied - i want u "physicists" address this NOW?

    4th law of motion states that mass oscillating within 180° or less converts its centrifugal force into linear acceleration of the system. lets put it into practical example. if u were floating in space and u throw a steel ball in front of you, u will be pushed back with equal and opposite force. this part u... show more
    4th law of motion states that mass oscillating within 180° or less converts its centrifugal force into linear acceleration of the system. lets put it into practical example. if u were floating in space and u throw a steel ball in front of you, u will be pushed back with equal and opposite force. this part u understand. however, if u swing the same steel ball in front of u there is no reaction that will push u back but u will be pulled forward by the centrifugal force. this simple, self evident natural phenomena is still not understood by those who consider themselves 'scientists' (they are not) nor regular folk alike. how is something so simple still not understood is the greatest irony in the history of the universe. i hope to see u rise out of ur confusion and finally get this.
    5 answers · 7 hours ago
  • If I carry an object 10 metres and then I take it back to where it was , my displacement is 0 , so is the work done equal to 0 too?

    Best answer: It required energy, but with no movement you did no work because it was not displaced by definition. I know it sounds fishy just based on our presumption of the term work it's confusing.
    Best answer: It required energy, but with no movement you did no work because it was not displaced by definition. I know it sounds fishy just based on our presumption of the term work it's confusing.
    6 answers · 1 day ago
  • Why is my obese roommate always complaining that it's so hot in our apartment when it's super cold?! Are fat people more sensitive to heat?

    I'm in college & live in an apartment with 3 people, not including me. We're all skinny except for one who's obese. He's always complaining that it's hot even though the rest of us think that it's cold as hell. Why is that? Are fat people more sensitive to heat? Does he require more cold... show more
    I'm in college & live in an apartment with 3 people, not including me. We're all skinny except for one who's obese. He's always complaining that it's hot even though the rest of us think that it's cold as hell. Why is that? Are fat people more sensitive to heat? Does he require more cold air molecules to hit his body to remove all the heat energy that his body fat is keeping in by insulating him? This is a serious question btw. I'm sincerely curious.
    5 answers · 12 hours ago
  • E = m*c^2, does this equation apply to all kinds of matter?

    For example. Does 1 kg of Uranium produce the same amount of energy as Plutonium which is: E = m*c^2 = (1kg)(3×10^9) = 3×10^9 Joules.
    For example. Does 1 kg of Uranium produce the same amount of energy as Plutonium which is: E = m*c^2 = (1kg)(3×10^9) = 3×10^9 Joules.
    9 answers · 3 days ago
  • Do you like electricity? Why?

    5 answers · 17 hours ago
  • Where is the universe kept?

    To have something, you must have something else. Examples: To keep water, you need a glass, or a river or an ocean. To keep gases, you need a cylinder, or a jar, or even empty space. Without space, you cannot keep anything. Space didn't exist before the big bang, so where was the singularity located? However... show more
    To have something, you must have something else. Examples: To keep water, you need a glass, or a river or an ocean. To keep gases, you need a cylinder, or a jar, or even empty space. Without space, you cannot keep anything. Space didn't exist before the big bang, so where was the singularity located? However infinitesimally small the singularity is, there must be some space (albeit unimaginably small) to keep the singularity. Doesn't this situation create a logical impossibility? How can something exist without space?
    16 answers · 5 days ago
  • Help me with my astronomy hw please?

    1.How can matter be converted to energy? 2.How is magnetism the source of solar activity?
    1.How can matter be converted to energy? 2.How is magnetism the source of solar activity?
    7 answers · 2 days ago
  • I’m trying to understand if there is a way to store energy created by magnets and a coil in a circuit in say.. a rechargeable battery?

    So basically I have watched videos on how to light up a little LED lightbulb by having a coil and rotating magnets etc.. but instead of that energy being used to light up a little LED, is there a way to store that generated energy to use at a later time in for example a battery? Quite new to this but it interests me.
    So basically I have watched videos on how to light up a little LED lightbulb by having a coil and rotating magnets etc.. but instead of that energy being used to light up a little LED, is there a way to store that generated energy to use at a later time in for example a battery? Quite new to this but it interests me.
    8 answers · 3 days ago
  • What is gravity?

    9 answers · 3 days ago
  • If the world were a cube, could we possibly fall off the edge and into space?

    would it be possible?
    would it be possible?
    5 answers · 1 day ago
  • Doesn't time travel violate the law of energy conservation?

    Best answer: It really depends upon how Time Works, which we really do not know yet. One theory is that time is a constant 4th dimensional motion inherent in all matter. where all motion is relative due to slight variations in the time motion vector---sorta like two cars matching speed on the highway--having no relative... show more
    Best answer: It really depends upon how Time Works, which we really do not know yet. One theory is that time is a constant 4th dimensional motion inherent in all matter. where all motion is relative due to slight variations in the time motion vector---sorta like two cars matching speed on the highway--having no relative motion and one then veering off--then there IS relative motion--the greater the veer angle the greater the relative speed. The other car also would drop back a bit too as its highway speed does not change--a geometrical illustration of "time dilation"--moving objects drop back in time..
    It also explains the light speed limit as the relative speed cannot exceed twice the highway speed of the cars (at a veer of 180 degrees)--any more angle and the relative speed decreases again.

    So the inherent 4D motion speed of matter (Time) is c over the square root of 2, making c the highest possible relative speed in the 3D universe at a 90 degree vector difference. Its NOT 180 degrees because this is not a 2D highway in the car example, and at any vector angle beyond 90 degrees, RELATIVE TIME effectively runs backwards---so the two objects our out of each others frame of reference.

    Now there may not be actual 4D movement as such, but a rapid transfer from one static 3 D parallel universe to another, each representing an "instant" of time, (similar to "frames" of a movie film) perhaps due to a constant change in some matter wave attribute, like" frequency" as an example. The parallel universes being separate and non interactive based on a unique "frequency". we may "hop" from being a part of one universe to another, as the particles in our body/mind change.----Of course this is just another way of looking at the first situation--things will behave the same, but a stack of parallel universes at different frequencies would comprise the total universe, and TIME TRAVEL would be theoretically possible if we could change the matter wave frequency attributes to match ANOTHER of these "parallel' "FRAME UNIVESES"---then we would become a part of a universe in the PAST. (the FUTURE may be more problematical as futures can change)

    And don't worry about Paradoxes--they cant happen in the Past any more than they can happen in the present--you cant be in New York and Chicago at the same time can you? In the past you simply will not be able to carry out any action that could have affected your going back to the past to begin with. Like a kind of "force" (or really lack of available force/energy) to pull the trigger on a gun pointed at your grandfather.---you cant cut your own timeline---It would be like an electric relay switch having the coil wired through the normally closed contact.--the bar keeps cutting off the energy before it can move down.
    8 answers · 3 days ago
  • When you have a helium balloon inside a regular air balloon how does it still float upwards?

    Isnt it displacing air and pressing against the bottom of the air balloon or how does that work?
    Isnt it displacing air and pressing against the bottom of the air balloon or how does that work?
    4 answers · 6 hours ago