General and Special Relativity

All scientific explanations of anything, if they are backed by substantial evidence, are classified as theories. If they have not been backed by substantial evidence then they are classified as merely hypotheses. No matter how good a theory may be, we can never be absolutely certain that someone will not eventually come up with an even better explanation, hence, theories remain theories, they are not Absolute Truth.

The impact speed for each car is 50 mph. During the crash, both cars are accelerated from a speed of 50 mph to zero, hence the impact speed is 50 mph. The relative speed between each car, however, is 100 mph.

In the year 1915-16.

A high pitched drilling sound when your radio is on could be caused by interference from electrical sources such as nearby power lines or electronic devices. It could also be due to a fault in the radio's internal components or wiring. Consider relocating the radio or checking its connections for any issues to troubleshoot the problem.

At speeds near the speed of light, the formulae from the Theory of Relativity show that there are discrepancies with classical physics - for example, in adding velocities. These discprepancies have been verified by many experiments.

In theory the discrepancies arise at any speed, but if the speed is much lower than the speed of light, the difference between classical physics and the more accurate Theory of Relativity is so insignificant that it can be ignored, and you can safely use the simpler formulae of classical physics.

Obstructions, black holes, etc.

If speed approaches the speed of light, the mass of any object will increase. This is not just theory; it is observed on a daily basis. Not with spaceships, of course; the technology is not ready yet - but with subatomic particles in accelerators.

rubbing alcohol has higher specific heat

the smallest thing in the universe. also its a vibrating string that creates energy. every thing is related though string theory.

The environment is hot, and it's always stifling indoors. I'm sure this must

help to explain the warmth of the people, and their outgoing nature.

2.2 × 10-6

Actually, we can't even confirm the existence of atoms, let alone subatomic particles. But when scientists conduct experiments, they come to the conclusion that the particles are indeed valid. The more discrete physics becomes, the more theoretical it is.

The answer depends on a variety of variables, but the simplest is that barring further action on the pencil mark (rubbing, wear, etc), it will last as long as the paper.

Fifteen revolutions equal fifteen circumferences, so the circumference is 3.5m/15, or about 0.233m. Since the circumference is pi times diameter, divide 0.233 by pi and you get about 0.074m, or 74mm. (Most books would require you to limit the answer to significant figures, which would round to about 70mm.)

No, a photon is not time travelling

According to the Theories of Relativity, time is NOT independent of the reference frame.

No tachyon has ever been discovered, thus there is no real symbol 'reserved' for it (like a greek nu is usually used to denote a neutrino).

Physicists may attempt to develop models containing tachyons but they usually choose their own symbol for their own particular tachyon.

unknown

But since you've already postulated two items so far unobserved and unknown

to science ... a wormhole, and a person traveling through one ... the story is

completely in your control, and you might as well keep going and make up a

description of what happens to him.

It would depend on the size of the wormhole. One the diameter of a donut would do the traveler serious harm. One the size of a bus wouldn't.

The survivor would merely end up somewhere else.

scientific theory is a tested and proved behavior of a system, in a standard condition, not minding any internal or external factors.

Sure. Anything that is mass-energy does.

He helped the US of today by giving us theories that helped explore new fields of technology.

An interesting question. For my money, there is no time in space. Time is a human construct devised as a way to regulate our environment, and based on the astronomical accident of the rotation speed of the earth. If you think about it, was there time for Neanderthals? No. They hunted when it was light, they ate after the hunt and they slept when it was dark. But we don't live that way. We need to know what the time is so we can get to work at 8:30. The only reason we know it's 8:30 is that someone took the rotation of the earth and divided it into 24 periods it called hours. It doesn't quite revolve that conveniently; that's why we have extra time to tack on at leap years, but it's close enough. So now we have constructed time, we can have trains leave on time and pace themselves so they arrive at their destination at a prescribed time, and not just as fast as it can get there. Planes have a schedule, doctors have surgery schedules, schools have 8 40 minute periods in a school day. But where there are no people, there is no need for time. No doubt when we go to live on Mars, they will create time based on the Martian rotation; that way the day shift knows when to end and the night shift knows when to go to work, and the barman knows when it's time to close the bar. Time is totally artificial and based on the environment of those who live in it.

We don't know enough about how gravity works to determine if it can be bent or deflected or negated. I suspect not - but I am mindful of Arthur C. Clarke's First Law. "When a distinguished but elderly scientist states that something is possible, he is almost certainly right. When he states that something is impossible, he is very probably wrong."

Clarke's Third Law may also be applicable here: "Any sufficiently advanced technology is indistinguishable from magic."

2100mAh battery will last longer due to higher capacity; probably for nearly 50% longer.

It was aimed at the British and gandhi refused to us he salt provided by them at high rates.Instead he prepared his own salt from the seashore in famous dandi march.He also boycotted foreign clothes adn promoted the use of handspun traditional Indian khadi.