Top answers

How do I resolve forces on a slope?

For any question which asks you to consider multiple forces acting on a body, the first thing you should do is draw a clear diagram, with all forces (and in this case angles) labelled.Once this has been done...
DB
Answered by Dan B. • Physics tutor
13308 Views

How is insulin secretion controlled?

Beta cells in the pancreas contain potassium and calcium ion channels - potassium ion channels are normally open and calcium channels closed. When glucose concentrations outside of the cell are high the gluc...
BF
Answered by Bethany F. • Biology tutor
9568 Views

What is an enzyme?

Enzymes are proteins that catalyse the conversion of substrates into products. Similar to other catalysts, enzymes are chemically unchanged during the reaction and they do not change the position of any equi...
BF
Answered by Bethany F. • Biology tutor
3752 Views

What is the difference between the rough endoplasmic reticulum and the smooth endoplasmic reticulum?

The rough endoplasmic reticulum (RER) has ribosomes bound to its surface, and it has a flattened-sac appearance. The RER is involved in packaging proteins to send to the Golgi apparatus. The smooth endoplasm...
BF
Answered by Bethany F. • Biology tutor
22197 Views

Find f'(x) and f''(x) when f(x) = 3x^2 +7x - 3

We know that when f(x) = x^n, f'(x) = nx^n-1 (1) So we apply this to all components of f(x), giving f'(x) = 2(3x) + 7 = 6x +7 to find f''(x), we apply (1) to f'(x). Giving f''(x) = 6
GP
Answered by Georgiana P. • Maths tutor
6142 Views