Top answers

What are the general trends of alkali metals (group 1)?

Group 1 metals all have one outer electron, which is responisble for their properties. As you go down the group: the metals become more reactive. This is due to the increased number of electron shells which ...
JB
5606 Views

What is negative feedback?

Firstly you have a change away from optimum conditions, for instance a decrease in internal body temperature, which is detected by a receptor. The receptor relays this infromation down the communication path...
JB
Answered by Josephine B. • Biology tutor
3055 Views

Describe and explain the motion of a skydiver from leaving the aircraft to reaching terminal velocity

Initially, there is only one force acting on the skydiver, which is their weight. F=ma therefore mg=ma. The m's cancel and the skydiver falls with acceleration g. However as soon as they have a downwards vel...
OF
Answered by Ollie F. • Physics tutor
6491 Views

What is the difference between determinism and fatalism?

First of all, the thing to realise is that both of these theories have the same result in the end. They both mean that how our life ends up is decided by forces other than ourselves. But the difference betwe...
BO
Answered by Ben O. • Philosophy tutor
76784 Views

Given that y=ln([2x-1/2x=1]^1/2) , show that dy/dx= (1/2x-1)-(1/2x+1)

y=ln([2x-1/2x=1]^1/2)- can be written as y= [0.5ln(2x-1)]-[0.5ln(2x+1)] due to laws of logs. Take first term -- (0.5ln(2x-1)) and substitute 2x-1 for u. so u=2x-1 and y=0.5lnu Now dy/du=1/2u and du/dx=2. to ...
SF
Answered by Sam F. • Maths tutor
11355 Views