There is no minimum speed for relativistic effects. Your car is a time machine. Your subjective elapsed time is shorter in a drive across town than it would have been if you had stayed home. The catch is that at driving speed, the effect is very small; your moving clock would read slower by a couple of trillionths of a second, perhaps. In order to get any other answer to your question, you need to specify the degree of relativistic effect you have in mind.
Relativistic effects come into play when particles are traveling at speeds close to the speed of light or when dealing with very strong gravitational fields. Non-relativistic effects are sufficient when dealing with everyday speeds and energies, such as in classical mechanics or chemistry.
The relativistic wave equation, such as the Klein-Gordon equation or the Dirac equation, takes into account special relativity effects such as time dilation and length contraction. On the other hand, the non-relativistic wave equation, such as the Schrödinger equation, does not include these special relativity effects and is valid for particles moving at much slower speeds compared to the speed of light.
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Relativistic effects are always present but are negligible for most purposes except for particles moving near the speed of light (special relativity) or near extremely dense, massive objects such as black holes (general relativity).
The mass of a proton remains constant regardless of its speed. The increase in mass at high speeds is due to relativistic effects, known as relativistic mass. At 99.9% of the speed of light, the relativistic mass of the proton would be higher than its rest mass, but its rest mass remains the same.
A non-relativistic particle is any particle not traveling at a speed close to the speed of light. This is not a property of particular type of particle; any particle may in general travel at any speed (below the speed of light). An exception are particles which are massless such as photons and gluons, these MUST travel at the speed of light.
Allowing for possible relativistic effects and adjusting for rounding, exactly one!
The mass of a proton is approximately 1.67 x 10^-27 kilograms. To calculate the relativistic mass of a proton moving at a speed of 2370 meters per second, you would need to use the formula for relativistic mass, which takes into account the increase in mass due to the proton's speed approaching the speed of light.
The speed of light is minimum in Glass. It is because light travels at minimum speed in solids.
to be blue-shifted and brighter due to the relativistic Doppler effect.
A projectile has minimum speed at the top of the trajectory.
It is not possible for a particle with mass to reach the speed of light, as it would require infinite energy. Additionally, at speeds approaching the speed of light, relativistic effects become significant, causing time dilation and length contraction.