# Recent content by Ester

1. ### Length contraction of a square

thanks, I get it now.
2. ### Length contraction of a square

How is it that "the case of motion along diagonal AC, both sides are contracted" ? Isn't it one side being contracted, the one parallel to motion? I'm having trouble picturing this.
3. ### Length contraction of a square

If you have a drawing of a square (labeled ABCD starting at lower left and going clockwise) and it is first at rest in an inertial frame. When this square moves, length contraction changes its shape. In each of the following three situations the speed is the same, and the velocity is in the...
4. ### Neurons and axons

can't somebody help me? :(
5. ### Lewis acid/base

well to start with, since F has three lone pairs, it would seem to be a good explanation, except that it is so electronegative that most of the time, electron of hydrogen are with F instead, giving it a dipole moment. A Lewis acid is when it can accept electrons or donate protons, in this case...
6. ### Neurons and axons

What problems does a neuron need to overcome to maintain the health and growth of the axon? I thought it has a problem with axon's length? Another question is: How would you estimate the muscle mass of a person? I know that muscle does not float, but adipose tissue does. Would I just...
7. ### Sordaria Questions

thank you guys for all your help
8. ### Entropy How much of the water is solid?

there should be an equation in physics specifically for adiabatic problems.
9. ### Calculate the change in energy of the hydrogen atom

E = (-2.18 x 10^-18 J) (1/1 -1/16) = - 2.04378 x 10^-18 J The answer is negative because the atome loses evergy.
10. ### [chem]Lewis Structure-Expanded Valence Shell

it's better that it fills its octet before making the charges be zero on a central atom. that's why there is resinance structures.
11. ### Chemistry questionpretty

I did a project on Palladium, if you need that?