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All Categories > Science & Mathematics > Physics

Physics

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  • How long does the present (now) last, before it becomes the past? Do physicists know?

    Best answer: The start of my answer is already in the past....Oh! Now the end of it is in the past...Oh! Now my remark is in the past...AAaaargh!
    Best answer: The start of my answer is already in the past....Oh! Now the end of it is in the past...Oh! Now my remark is in the past...AAaaargh!
    16 answers · 2 days ago
  • How long does it take an airplane to take off if it needs a speed off the ground of 350 km/ hr over a distance of 600 m?

    7 answers · 2 days ago
  • Why do people say radio frequencies travel at light speed?

    They don’t travel at all, when you push to talk its instantly, no traveling
    They don’t travel at all, when you push to talk its instantly, no traveling
    28 answers · 5 days ago
  • Is it true that when you are wealthy and bored that yo masturbate a lot and like to hunt exotic animals on tiny plots of land?

    Best answer: No, when you are wealthy you don't need to masturbate because you have access to the thing that masturbation simulates. Also, if a wealthy man gets bored then they will start on a new project (because that is how they got wealthy to begin with).
    Best answer: No, when you are wealthy you don't need to masturbate because you have access to the thing that masturbation simulates. Also, if a wealthy man gets bored then they will start on a new project (because that is how they got wealthy to begin with).
    7 answers · 3 days ago
  • If we live in one universe , how come the 4-forces of Nature cannot be unified into one force? can you unify the 4 forces of nature ?

    If we live in one universe , how come the 4-forces of Nature cannot be unified into one force? can you unify the 4 forces of nature ?

    10 answers · 3 days ago
  • Help with physics?

    5 answers · 12 hours ago
  • Do you agree or disagree with this statement.?

    Best answer: No it's completely false. Smoking is one reason for coughing. Coughing has many reasons to happen and only one of them is smoking. Therefore, claiming that someone smokes because they cough is total bullshit.
    Best answer: No it's completely false. Smoking is one reason for coughing. Coughing has many reasons to happen and only one of them is smoking. Therefore, claiming that someone smokes because they cough is total bullshit.
    10 answers · 3 days ago
  • How does Electricity work ? do you know ?

    How does Electricity work ? do you know ?

    9 answers · 3 days ago
  • Why sun & earth exert equall force on each other?

    Earth mass is less than sun so the earth should have low gravitational force and as sun gravity is larger therefore sun will have larger gravitational force, but they exert equall force on one another why?
    Earth mass is less than sun so the earth should have low gravitational force and as sun gravity is larger therefore sun will have larger gravitational force, but they exert equall force on one another why?
    8 answers · 2 days ago
  • A child sliding down a slide goes from rest to 7 m/s. What is the vertical height of the slide? thanks?

    Best answer: Neglect friction. His potential energy mgh is completely converted to kinetic energy ½mV² at the bottom of the slide where h = 0
    mgh = ½mV² ------> 2gh = V² -----> h = 7²/(2*9.8) = 2.5m <<<<<
    Best answer: Neglect friction. His potential energy mgh is completely converted to kinetic energy ½mV² at the bottom of the slide where h = 0
    mgh = ½mV² ------> 2gh = V² -----> h = 7²/(2*9.8) = 2.5m <<<<<
    4 answers · 1 day ago
  • Can anyone understand my math/sphere question? (please read details below)?

    Best answer: You are mixing up pure mathematics and physics. Stick to one or the other and the answer is obvious in each case.
    Best answer: You are mixing up pure mathematics and physics. Stick to one or the other and the answer is obvious in each case.
    8 answers · 3 days ago
  • Why is m yneighbor watching me through window. Everytime I leave house and when I enter the house?

    Best answer: Maybe he/she likes you.
    There is nothing wrong or illegal about a person looking out of the window of his house.
    Best answer: Maybe he/she likes you.
    There is nothing wrong or illegal about a person looking out of the window of his house.
    5 answers · 2 days ago
  • A soccer player kicks the ball toward a goal that is 30.0 m in front of him. The ball leaves his foot at a speed of 19.5 m/s and an angle?

    of 30.0° above the ground. Find the speed of the ball when the goalie catches it in front of the net. (Note: The answer is not 19.5 m/s.)
    of 30.0° above the ground. Find the speed of the ball when the goalie catches it in front of the net. (Note: The answer is not 19.5 m/s.)
    4 answers · 12 hours ago
  • EVERYTIME SHE KISSES HIM HE GETS WEAKER I GET STRONGER SWEAR ON HER FAMILY?

    HAHAHAHAHA!!!! I am rewriting her thought waves or she's going downwards in the world hierarchy I swear on her children to God.
    HAHAHAHAHA!!!! I am rewriting her thought waves or she's going downwards in the world hierarchy I swear on her children to God.
    4 answers · 13 hours ago
  • How much would you weigh on a planet 3 times earth mass and 3 times its radius?

    4 answers · 14 hours ago
  • Should i major in physics or math?

    14 answers · 1 week ago
  • Can I use a hadron collider to microwave my pizza rolls?

    Best answer: This would be similar to trying to heat it by firing bullets from an automatic weapon at it. The remnants may well be hot. However as the energy per bullet is so high they mostly pass straight through the pizza destroying the structure of it. Like buying the pizza from "Greasy Joe's" It wouldn't... show more
    Best answer: This would be similar to trying to heat it by firing bullets from an automatic weapon at it.
    The remnants may well be hot.
    However as the energy per bullet is so high they mostly pass straight through the pizza destroying the structure of it. Like buying the pizza from "Greasy Joe's"
    It wouldn't even look like a pizza anymore.

    That is the problem of using individual particles with too high an energy.

    Here is a better way. Get two sticks. Rub them together to start a fire.
    After an hour or so of exertion and failing to start the fire you will be hot enough that you merely put the pizza roll on your sweating chest and they will be cooked to perfection quite quickly.
    7 answers · 3 days ago
  • Do you feel that all perception is an illusion? If so do each of us live in parallel universes?

    10 answers · 6 days ago
  • Why does my car slow down without me changing the pressure of how much I press on the acceleration when it encounters a big puddle of water?

    Best answer: There are many different ways to lose energy. Sliding friction is only one of those. The majority of the power of the engine is used to push air out of the way. The air was stationary so it had no energy. When the car passes the air is given sideways and forwards velocity so it NOW has kinetic energy. Therefore you... show more
    Best answer: There are many different ways to lose energy. Sliding friction is only one of those.
    The majority of the power of the engine is used to push air out of the way.
    The air was stationary so it had no energy.
    When the car passes the air is given sideways and forwards velocity so it NOW has kinetic energy.
    Therefore you know that this requires power from the engine. Even without knowing any of the mechanism of how it gets transferred.

    The same is true of the puddle. It was stationary. Once the car passes the water is given speed in varying directions. So you KNOW that it has been given kinetic energy.

    You are right that the water reduces the friction between the tyres and the road. If the road is just damp ( and no more ) the car actually needs less power to drive on the road.
    Once the water depth increases, even to a depth of 1mm, then for the tyre to reach the road the water must be squeezed sideways and forwards. This tends to lift the car from the road a bit.
    Which means that it is like making a continual hill just in front of the tyre.
    Incidentally if you continue to accelerate then the water can ACTUALLY lift the car from the road ( called aquaplaning) and then you have zero control of the vehicle.

    As a bike rider where the power comes from me I am acutely aware of how much power is needed in different conditions.
    6 answers · 4 days ago
  • What is the acceleration of a race car that moves at constant velocity of 30m/s?

    12 answers · 6 days ago

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1 MikeY MikeY 1,432
2 jcherry_99 jcherry_99 1,392
3 ry0534 ry0534 600
4 johnandeileen2000 johnandeileen2000 485
5 panic mode panic mode 254
6 busterwasmycat busterwasmycat 253
7 zsm28 zsm28 216
8 Zeta1 Zeta1 206

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