• If the Earth is round, why don't airplanes have to compensate for the curvature of the Earth?
  • Is Isot possible to grain the human eye to see in slow motion? For if I want to be better in basketball or football I want to see in slow?

    Be able to maneuver past opponents in tricky situations. Can the human eye be trained to see in slow mo
    Be able to maneuver past opponents in tricky situations. Can the human eye be trained to see in slow mo
    7 answers · 3 days ago
  • Why can i hear thunder in the future on facetime?

    i was on the phone with my friend, we live a block away from each other and it’s thunderstorming. i can hear the thunder on her end before it happens outside and then like 5 seconds later i hear it outside?? is she in the future?
    i was on the phone with my friend, we live a block away from each other and it’s thunderstorming. i can hear the thunder on her end before it happens outside and then like 5 seconds later i hear it outside?? is she in the future?
    6 answers · 8 hours ago
  • Would a lesbian nun still be married to Christ?

    If she didn’t want to be, who would she marry instead??
    If she didn’t want to be, who would she marry instead??
    6 answers · 8 hours ago
  • If I fold a piece of paper 42 times can I climb to the Moon and back?

    Best answer: You can only fold a piece of paper seven times**...... any more and you are a wizard.
    Peace.

    ** Irrespective size of such paper.
    Best answer: You can only fold a piece of paper seven times**...... any more and you are a wizard.
    Peace.

    ** Irrespective size of such paper.
    9 answers · 2 days ago
  • Is it possible for time travel to exist with the right technology?

    I've heard traveling into the future is possible but traveling back in time is really hard. One of my friends actually time traveled before so he asked me if I wanted to come next time he goes I'm a bit scared though.
    I've heard traveling into the future is possible but traveling back in time is really hard. One of my friends actually time traveled before so he asked me if I wanted to come next time he goes I'm a bit scared though.
    12 answers · 4 days ago
  • Am I safe from lightning in my car?

    Best answer: Yes you are, so long as you're not touching the exterior of the car or in a convertible with the top down. It's a common misconception that rubber tires insulate the car. In reality, the reason you're safe is because of the Faraday cage effect. It also works for airplanes. However, even though you... show more
    Best answer: Yes you are, so long as you're not touching the exterior of the car or in a convertible with the top down. It's a common misconception that rubber tires insulate the car. In reality, the reason you're safe is because of the Faraday cage effect. It also works for airplanes.

    However, even though you are safe inside the car, the car itself can still be damaged from lightning strikes.
    10 answers · 3 days ago
  • Since Antarctica can reach temperature like -80 C, ,why isn’t there any place on the planet earth can reach an air temperature like 70C, 80C?

    Best answer: "Hor air rises". That is the main reason. If air is heated it moves upwards and cooler air comes in from elsewhere using winds along the ground. We do not have a ceiling to prevent the air from going up. Only if you have a temperature inversion layer can you get trapped air heating up in a... show more
    Best answer: "Hor air rises". That is the main reason.
    If air is heated it moves upwards and cooler air comes in from elsewhere using winds along the ground.
    We do not have a ceiling to prevent the air from going up.
    Only if you have a temperature inversion layer can you get trapped air heating up in a disproportionate manner.
    Even there the ground can still radiate heat outwards to the cold of outer space.

    "Cold air falls" so in a valley surrounded by hills the cold air falls to the bottom. It loses even more heat via radiation so it gets ever colder.
    In Antarctica during winter there is no sunlight. The ground radiates heat to outer space. But that leaves the cold air sinking to the ground. There is no convection current to bring warmer air from elsewhere.

    Hence there is always a moderation of excessive heat but there is not as great a moderation of excessive cold. At least not in air.
    In water the situations are different.
    8 answers · 2 days ago
  • A rubber ball is dropped from the top of a hole. Exactly 1.5 seconds​ later, it's heard hitting the bottom. How deep is the hole​?

    Best answer: The speed of sound in air is 343 m/s. During the first part of 1.5 seconds, the ball falls from the top to the bottom of the hole. During the second part of 1.5 second part of the 1.5 seconds, the sound rises from the bottom to the top of hole. Let t be the time the ball is falling and 1.5 – t be the time the sound... show more
    Best answer: The speed of sound in air is 343 m/s. During the first part of 1.5 seconds, the ball falls from the top to the bottom of the hole. During the second part of 1.5 second part of the 1.5 seconds, the sound rises from the bottom to the top of hole. Let t be the time the ball is falling and 1.5 – t be the time the sound is rising.

    For the ball, d = ½ * 9.8 * t^2 = 4.9 * t^2
    For sound, d = 343 * (1.5 – t) = 514.5 – 343 * t
    These two distances are equal.

    4.9 * t^2 = 514.5 – 343 * t
    4.9 * t^2 + 343 * t – 514.5 = 0
    t = [-343 ± √(343^2 – 4 * 4.9 * -514.5)] ÷ 9.8
    t = [-343 ± √127,733.2] ÷ 9.8
    t = [-343 + √127,733.2] ÷ 9.8

    The time is approximately 1.47 seconds.

    For the ball, d = 4.9 * (343 + √127,733.2] ÷ 9.8)^2
    The distance is approximately 10.6 meters.

    OR

    d = 514.5 – 343 * (-343 + √127,733.2] ÷ 9.8)
    The distance is approximately 10.6 meters.
    6 answers · 5 days ago
  • If I ran in a circle really, really fast?

    Best answer: You made my morning!! OMG, thanks for the laugh :-) !!
    Best answer: You made my morning!! OMG, thanks for the laugh :-) !!
    6 answers · 2 days ago
  • Definition of matter?

    5 answers · 6 hours ago
  • To give a 20-kg child a ride, two teenagers pull on a 3.6-kg sled with ropes, as indicated in the figure (Figure 1).?

    Both teenagers pull with a force of 55 N at an angle of 35 ∘ relative to the forward direction, which is the direction of motion. In addition, the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. Find the acceleration of the sled and child.
    Both teenagers pull with a force of 55 N at an angle of 35 ∘ relative to the forward direction, which is the direction of motion. In addition, the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. Find the acceleration of the sled and child.
    5 answers · 16 hours ago
  • Since coldness itself does not exist(it only means the degrees of lacking of heat) and the lower the temperature is, (Please see below)?

    The more moderate the atoms and molecules move, the lesser the kinetic energy is there Then why are the extreme low temperatures like -250 C, -200 C , -150 C, -100 C or even -50 C still extremely dangerous and harmful to human body
    The more moderate the atoms and molecules move, the lesser the kinetic energy is there Then why are the extreme low temperatures like -250 C, -200 C , -150 C, -100 C or even -50 C still extremely dangerous and harmful to human body
    4 answers · 1 day ago
  • What would happen if a nuclear power plant explodes in a small town?

    I live in a small town and they are putting in a nuclear power plant. My imagination tends to run wild so I was wondering what would happen if it explodes. Will it cause radioactive problems, or will it not cause any problem?
    I live in a small town and they are putting in a nuclear power plant. My imagination tends to run wild so I was wondering what would happen if it explodes. Will it cause radioactive problems, or will it not cause any problem?
    18 answers · 1 week ago