March 30, 2017

Scientists at Massachusetts’s Worcester Polytechnic Institute turned spinach leaves into heat tissue. How? They first took out cells from the leaf, making it translucent and leaving behind the structure and matrix. Then, they filled out the gaps with human heart tissues. 

Cultivating human tissue on a plant scaffold is not easy but potentially very rewarding. If scientists would be able to develop these tissues enou...

March 26, 2017

y=a sin bx

A= amplitude = the height from the center line to the peak (or to the trough)

Period = 2Pi/ b= distance from one peak to the next (or from any point to the next matching point).

Frequency is how often something happens per unit of time (per "1").

Horizontal Shifts:

y= sin(x-2Pi)

move graph 2 Pi units to the right

Vertical Shifts


move graph 3 units down

To find an amazing trigonometry tutor, contact us her...

March 2, 2017

Strong acids dissociate completely. What does it mean? If a strong acid is put into water, it will break completely into H+ and whatever it left (for example HCl --> H+ and  Cl-). So if I start with 3 moles of HCl , it will break and give 3 moles of H+ and 3 moles of Cl-.

A weak acid, on the other hand, dissociates only partially. For example, if I start out with 3 moles of acetic acid, only 0.002 moles of it will b...

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