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But today we know that Einstein theory dont work at big and micro scale, inside black hole and in quantum mechanics, we must invent dark...

If source is accelerating toward you, light will comes to you again at speed c? Who know what they actually are? They are just math...

I just want to say that is perfectly clear if you measure light speed from earth frame you will always get same speed. If they assumed...

I don't understand why people in Michelson-Morley experiment expect that light speed in direction in Earth motion would be light speed +...

Because you cannot "just simplify" unless you specifically exclude ##x=2## at which point, as you have discovered, the function is...

The two functions are identical except at the point (2, 4). The graph of ##f(x) = \frac{x^2 - 4}{x - 2}## can be thought of as a...

An important attribute of any function is its domain. The difference between the two functions in the OP is that, because of the...

OK thanks for answer, I always thought that simplify function doesn't change absolute nothing..

This function ##f(x) = \frac{x^2 - 4}{x - 2}## when simplify become ##f(x) = x + 2## . If I enter ##x=2## in the first expression I...

@kuruman @Andy Resnick @.Scott . . and all other is this thread Our universities engineering(absolute grading) has less than 1%...

Yes that make sense, but you can still get them very hard exam with absolute grading. In my country at engineering uni best grade get...

From my experience, there is always a distribution of talents and abilities in every class. I never had a class with only bad students...

What do you think why some uni (all in USA) use curve grading?

Yes physics/engineering, how good are students in class, one class can be bad, other very god etc

@kuruman @symbolipoint @.Scott @berkeman @Andy Resnick @Herman Trivilino etc Is it a higher probability that we have differences in...