Yeneta education

We might have nothing to do with it, but this is a quite little improvement. All I can say is that we will make ours time better.( World average iq ranking)

An incredible problem from a physics book.

Update*
# We have prepared two week Kinematics session on yeneta education.
# We will post important notes, questions and much more. You also will be able to ask, answer, and share your knowledge.
# Starting date November 2. Ending date November 16.
# To participate, you just need to agree the terms and conditions.
# Deadline November 1 11:00 pm.
# We may not prepare Kinematics season again, so don't miss the chance.

We selected important notes, but your questions we'll help everyone better than the posts. please participate, so as we will better address what you want.

If you want to become editor in the subjects of physics and mathematics, you can contact me, but you must fulfill the requirements.

The examples and problems in this page we usually give numerical values with three significant figures, so your answers should usually have no more than three significant figures. (Many numbers in the real world have even less accuracy. The speedometer in a car,
for example, usually gives only two significant figures.) Even if you do the arithmetic with a calculator that displays ten digits, a ten-digit answer would misrepresent the accuracy of the results.

In many cases the uncertainty of a number is not stated explicitly. Instead, the uncertainty is indicated by the number of meaningful digits, or significant figures, in the measured value. We gave the thickness of the cover of the book as 2.91 mm, which has three
significant figures. By this we mean that the first two digits are known to be correct, while the third digit is uncertain. The last digit is in the hundredths place, so the uncertainty is about 0.01 mm. Two values with the same number of significant figures may have different
uncertainties; a distance given as 137 km also has three significant figures, but the uncertainty is about 1 km. A distance given as 0.25 km has two significant figures (the zero to the left of the decimal point doesn’t count); if given as 0.250 km, it has three significant figures.
When you use numbers that have uncertainties to compute other numbers, the computed numbers are also uncertain. When numbers are multiplied or divided, the result can have no more significant figures than the factor with the fewest significant figures
has. For example, 3.1416 * 2.34 * 0.58 = 4.3. When we add and subtract numbers, it’s the location of the decimal point that matters, not the number of significant figures. For example, 123.62 + 8.9 = 132.5. Although 123.62 has an uncertainty of about 0.01, 8.9
has an uncertainty of about 0.1. So their sum has an uncertainty of about 0.1 and should be written as 132.5, not 132.52.

All informations in the above picture are quite important, but I want to emphasize this one because it was once my question.
* If there are any intermediate stages in the calculation, keep all of the
figures on your calculator screen for later stages in the calculation.
You should only round your calculation to the appropriate number
of significant figures at the end of the calculation.

Here's one of important areas mostly leave behind.

Uncertainty