General and Special Relativity

Fired ammunition from a firearm reaches a much higher initial velocity due to explosive propellant forces. In contrast, ammunition dropped from a high altitude reaches a terminal velocity where gravity pulling down is balanced by air resistance pushing up. The fired bullet maintains its higher velocity until slowed by air resistance and gravity, while dropped ammunition reaches a constant speed due to these opposing forces.

As soon as history began being recorded. Prehistoric simply means that nothing was being recorded. For instance, the prehistoric era ended in parts of ancient Mesopotamia about 3000 BCE, while an undiscovered tribe that exists right now (and there are some, particularly in the Amazon) would still be considered prehistoric.

Because it affected the world and killed heaps

Einstein's major contributions are as follows: -used molecules to explain random movements in a fluid and calculated the dive of the molecules. -made the idea of Photons a reality by using them in his paper on the photoelectric effect. -The Special theory of Relativity stated the laws of physics are the same for all uniformly moving frames of reference. -general relativity is his ultimate work, a theory of gravity where gravity is equal to acceleration and is caused by the warping of space-time itself by the prescence of mass/enegy. Also, e=mc^2 is something he came to after the special theory of relativity, and he attempted a unified field theory but never finished it.

Once the heat transfer has occurred, there's not much you can do to prevent its effects.

But there are things you can do to prevent, or minimize, the heat transfer in the first place.

Those procedures and processes usually fall under the general category of "insulation".

-- subatomic particles traveling at large fractions of lightspeed exhibit increased lifetime

and increased mass; these effects, and their magnitudes, are accurately predicted by the

math of relativity

-- atomic clocks, arriving back at their starting point after being carried around the world

in aircraft, are found to be slow; this effect, and its magnitude, are accurately predicted

by the math of relativity

-- Newtonian mechanics predicts a magnitude for the precession of the nodes of Mercury's

orbit that is wrong; the observed rate of precession agrees precisely with the math of relativity

-- the light of a distant star is bent when it passes close to the rim of the sun; this effect, and

the amount of bending, are accurately predicted by relativity

Every experiment that's been concocted to test any of the weird predictions of relativity

over nearly the past century has produced results that support the theories.

October 1915. Although David Hilbert published the field equations a few months prior to this date, whether or not both developed them independently is still open for debate.

Auguste Comte

A+

Einstein was a theoretician who proposed a framework for analysis of our Universe which did at least two things: (1) led to the formula E = mc^2 and (2) completely changed our fundamental understanding of our Universe. Prior to publishing his ideas, he did no experiments to test if any of the predictions of his work were, indeed, correct.

His framework COULD have been wrong; he would not have been the first person to make such a mistake. However, in the last 107 years, no reproducible experiment has ever been performed that would contradict the predictions of his framework. And, every time someone uses a GPS device, it works ONLY by assuming Einstein was correct.

Gravity is a result of curved spacetime

But apart from providing that abstract concept it does not provide any mechanism or explanation.

yes and no not a personal but a god all mighty

He believed in some kind of spirit which rules Universe, something like collection of natural laws, but he did not believe in personal God who is interested in our lives

E = M c2

M = (E) / (c2)

M = (9 x 1016) / (3 x 108)2

= (9 x 1016) / (9 x 1016)

= 1 kg

Amazing. That's a lotta energy. Like 2.85 gigawatt-years, according to my Casio !

Albert Einstein is widely credited for deriving this equation from his own theory of special relativity in 1905.

The Law of Inertia states that the body will preserve its velocity and direction so long as no force in its motion's direction acts on it.

Yes ,we do still use the theory of relativity as it deals with the relativity of motion and rest. And, it is of great importance for the micro-world like sub-atomic phenomena of nuclear interactions. So the theory of relativity will be always useful.

The simplest derivation of this that I've seen considers an empty box far out in space, well away from the influence of any other matter or energy.

By Newton's laws of motion, the position of the center of mass of this box cannot change. But let's cause a photon to be emitted from one end of the box toward the other end; this photon has momentum, and therefore the box must recoil, moving in the opposite direction as the photon. Then the other end of the box absorbs the photon, stopping the motion of the box.

But now the box is in a slightly different position than before. Since the center of mass of the box cannot move, this must mean that the energy of the traveling photon has a mass equivalence.

Working the relevant equations leads directly to E = m * c^2

The actual route Einstein took to reach this conclusion was much different and less straightforward.

All you need to know to answer this question is the acceleration due to gravity on Mars, which is 3.71 m/s. Plugging that number into the equation F = m*gm, where F is the force on the object due to gravity, also called its weight, m is the mass of the object and gm is the acceleration due to gravity on Mars. The result is

185.5 kg*m/s or 185.5 N.

Yes. He did not practice Judaism, but his Jewish identity was very strong. He was a supporter of Israel, and worked tirelessly against antisemitism.

Here are some quotes from Einstein regarding Jewish Identity.

"There are no German Jews, there are no Russian Jews, there are no American Jews....There are in fact only Jews."

"The pursuit of knowledge for its own sake, an almost fanatical love of justice, and the desire for personal independence-these are features of the Jewish tradition which make me thank my lucky stars that I belong to it."

In certain areas, it provides a better explanation of how our Universe works than previous theories - an explanation that is in close agreement with experiment.

hydraulic pump

Albert Einstein stated that he came up with the theory of relativity by imagining himself sitting on a proton. He then imagined what it would look like if he could see the electromagnetic field of a proton. This lead to a long chain of thoughts that eventually ended in him forming the theory of relativity.

It states that the force of attraction between two universal bodies is directly propertional to the product of massess of two bodies and inversely propertional to the square of distance between the two bodies.

Special relativity states that all laws of science shall be the same to all obervers no matter their location or how they are moving in the absence of gravitational fields. General relativity is based on the same exact idea but also seeks to explain the force of gravity in terms of a curving four-dimensional space-time. The difference between these theories arises in that according to the theory of relativity, nothing can travel faster than the speed of light, however the gravitational attraction between 2 objects is stronger the closer they are to each other, if they are moved farther away or closer together the change in the attraction is instantaneous. Scientists sought to explain this, and Einstein did so by suggesting that gravity is not truly a force but in fact a consequence to the fact that space-time is curved/warped by the energies and masses within it and not flat as it had been thought of until then.