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Relativistic

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Lorentz invariance Newtonian physics assumes that absolute time and space exist outside of any observer; this gives rise to Galilean invariance. It also results in a prediction that the speed of light can vary from one reference frame to another. This is contrary to observation. In the special theory of relativity, Einstein keeps the postulate that the equations of motion do not depend on the reference frame, but assumes that the speed of light c is invariant. As a result, position and time in two reference frames are related by the Lorentz transformation instead of the Galilean transformation. Consider, for example, one reference frame moving relative to another at velocity v in the x direction. The Galilean transformation gives the coordinates of the moving frame as t ′ = t x ′ = x − v t {\displaystyle {\begin{aligned}t'&=t\\x'&=x-vt\end{aligned}}} while the Lorentz transformation gives t ′ = γ ( t −
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Momentum

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In Newtonian mechanics, linear momentum , translational momentum , or simply momentum (pl. momenta) is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction. If m is an object's mass and v is its velocity (also a vector quantity), then the object's momentum is: p = m v . {\displaystyle \mathbf {p} =m\mathbf {v} .} In SI units, momentum is measured in kilogram meters per second (kg⋅m/s). Newton's second law of motion states that the rate of change of a body's momentum is equal to the net force acting on it. Momentum depends on the frame of reference, but in any inertial frame it is a conserved quantity, meaning that if a closed system is not affected by external forces, its total linear momentum does not change. Momentum is also conserved in special relativity (with a modified formula) and, in a modified form, in electrodynamics, quantum mechanics, quantum field theory, and general rela
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42)Sheikh Hasina the right choice as key guest to the Republic Day time but trust the PMO to miss the obvious

India Republic Day -- From a record 10 Chief Visitors for the Republic Day Celebration in 2018 to non-e in 2021 is as significantly a reflection on Prime Minister Narendra Modis out of the box approach to foreign policy. From the record 10 Chief Visitors for the Republic Day Celebration in 2018 to non-e in 2021 is as significantly a reflection on Prime Minister Narendra Modis out of the box approach to foreign policy since his blind spots even though zeroing in on an amazing foreign dignitary. Sheikh Hasina Prime Minister of Bangladesh would have been the perfect Republic Day Chief Guest this season for umpteen reasons nonetheless it obviously didnt occur to Modi to single her out for the honour. I shiver to even speculate if the visionary and statesman including Modi is blinded by simply her religion or gender or both to pass your girlfriend up? Instead of inviting British PM Boris Johnson who else ultimately chickened out Hasina should have been Modis intelligent choice this ye
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