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State and explain two adaptations of a red blood cell?

Red blood cells have a biconcave disk shape, meaning that it increases their surface area and allows for more rapid diffusion of oxygen into and out of the cell.

Red blood ...

Answered by Joe D. • Biology tutor

23945 Views

Write a balanced chemical symbol equation for a reaction between Potassium and Water, including state symbols?

2K(s) + 2H₂O(l) = 2KOH(aq) + H₂(g)

Potassium (K) is a group 1 metal, which is a solid.

Water (H₂O) reacts with Potassium to form Potassium H...

Answered by Joe D. • Chemistry tutor

154035 Views

Differentiate with respect to x and write in its simpliest form, Y=(2x-3)/x^2?

Y=(2x-3)/x²

Quotient Rule: dY/dx(u/v)=(u'v-v'u)/v²

dY/dx=(2x²-2x(2x-3))/x⁴

=(6x-2x²)/x⁴(C...

Answered by Joe D. • Maths tutor

6145 Views

[FP2] Solve: 3 cosh x - 4 sinh x = 7

First write cosh and sinh as exponentials, from their respective definitions:sinh x = 1/2 (e^x - e^-x)cosh x = 1/2 (e^x + e^-x)So: 3 * 1/2 (e^x + e

Answered by William U. • Maths tutor

21097 Views

What is the difference between "ser" and "estar"?

This is a tricky one. The rhyme I learned "how you feel and where you are - that is when you use estar!" is pretty useful, but I like to remember it based on whether the state of something ca...

Answered by Sophie L. • Spanish tutor

2004 Views