Recent content by christinono

Actually, that is not quite right. The best indicator to use for a titration is one which the equivalence point (pH) falls into the range - preferably the middle - of the indicator. In this case, the bromothymol blue would be ideal, because it would change colour when the pH equals about 7. The...

sin\theta = \frac{opposite}{adjacent} cos\theta = \frac{adjacent}{hypotenuse} tan\theta = \frac{opposite}{adjacent} Use the one which contains the unknown variable and the variable you are given.

It's asking for the FINAL velocity, right? The velocity can't be constant. Use W=Fd and the change in kinetic energy formula.

Do you know SOHCAHTOA?

You can also use Work = \frac{1}{2}mv_f^2 - \frac{1}{2}mv_i^2

Wait a minute... how did U get from P=W/t to P=fd/t? :confused:

Yes, that looks right. :smile:

Well, it's hard to tell for sure. If you had more points, it would be easier to determine. The first 3 points look linear, but with the last 2 points, it looks more like a root relationship.

Wait a minute, let me enter the data in my calc

Power = work/time work = fdcos(angle)

Yes, the period an element is in represents the valence energy level.

First, determine what kind of relationship it is (i.e. exponential, root...). WHat kind is it?

Each principle energy level has different types of orbitals (except for the first, of course). The fourth energy level has: 4s, 4p, 4d, 4f. The d shell consists of FIVE orbitals, each containing a maximum of 2 electrons (max of 10 electrons).

Yeah, i think so

You take the 30 m/s, divide it by 2, and multiply it by the time to get the distance.