Recent content by GreatestPhysician99

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    High School Gravity -- a force or a cause of a force?

    In Newtonian mechanics gravity is a force , it is the attraction of two objects with mass.
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    Undergrad What are the top toys that can run almost perpetually?

    Why can't I succeed?Space is almost empty.
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    High School Why does it take thousands of years for light to reach the surface of the Sun?

    Yes light is trapped inside the Sun for many many years due to emissions and absorptions to random directions.
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    Graduate Center of mass momentum of a photon and electron system

    It can be conserved as relativistic momentum or energy.
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    Graduate Center of mass momentum of a photon and electron system

    And when it emmits a photon it will lose momentum (slow down) according to the static frame of reference
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    Graduate Center of mass momentum of a photon and electron system

    The electron will gain momentum (start moving ) according to the static frame of reference . So this is wrong.
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    Undergrad What are the top toys that can run almost perpetually?

    Perpetual motion is possible in vacuum (e.g space) under the presence of only one field and of course we give the object some momentum.
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    Graduate Center of mass momentum of a photon and electron system

    Hmm why is it forbidden ? The photon's momentum and energy will be converted to electron's momentum and energy since the electron absorbes the photon.If it emmits it , the electron will lose momentum and energy...
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    Graduate Center of mass momentum of a photon and electron system

    Momentum and energy are always conserved no matter what.
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    Graduate Center of mass momentum of a photon and electron system

    During the absorption / emission of a photon the total momentum and energy of the system is conserved. Now the system contains both photon and electron.
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    Undergrad Why is a two-layered design recommended for heat insulation experiments?

    Materials have different thermal conductivities so in a given amount of time , the temperature of the house will change because different amount of heat will "travel" from the hot parts to the cold parts.But if you let it enough time , in both times an thermal equillibrium will be reached.
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    Question regarding this Basketball Kinematics Diagram

    The ball will do both linear and rotational motion.The work done on the ball will be converted in both angular and linear momentum.
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    High School What happens to buoyancy when a non-uniform force is applied to the liquid?

    Buoyancy is not a real force . It is caused by the difference in pressure between 2 areas of the submerged item . It is the result of Pascal's principle for submerged objects.Pascal's principle says in simple that as we go down to the container of a fluid , pressure exerted by the fluid is...
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    High School Trying to understand the basics of Hooke's law

    Hooke's law just says that any spring resists to the change of its original width by exerting a force on the object making the change . The more we displace the spring , the more the spring resists to the displation