Top answers

The equation kx^2+4kx+5=0, where a is a constant, has no real roots. Find the range of possible values of k.

First, if k=0 then the equation has no real roots since in this case we would have 5=0 (this is a proof by contradiction). A quadratic equation of the form ax^2+bx+c=0 has no real roots if the discriminant b...
EN
Answered by Emily N. • Maths tutor
14235 Views

What is contained within a nucleus of a cell and how is this made up or arranged

DNA is contained within the nucleus of the cell. It contains genes which are a sequence of DNA codes. Each gene codes for a protein. All the DNA is coiled into structures called chromosomes. There are 46 chr...
DP
Answered by Dipali P. • Biology tutor
4430 Views

How does muscle contraction take place?

First of all an action potential reaches the end of a motor neuron and the neurotransmitter acetylcholine is then released into the synapse. An action potential is initiated in the muscle cellSarcoplasmic re...
LH
Answered by Laura H. • Biology tutor
2029 Views

Outline the process of synaptic transmission (8)

The process of synaptic transmission is when electrical nerve impulses, known as action potentials, travel from the dendrites of the cell (the receptor site) to the axon terminal. When these action potential...
GS
5430 Views

Qu'aimes-tu faire pendant ton temps libre?

Lorsque j'ai du temps libre, j'aime lire des romans d'aventures, me promener dans la nature ou bien cuisiner des desserts! En effet, je prépare souvent des gâteaux avec ma mère: elle me montre ce qu'il faut ...
DK
Answered by Daria K. • French tutor
15650 Views