Top answers


How to solve the simultaneous equations of 3x + 2y = 9 and x-y = 3

First off we can refer to the equations as equation 1 and equation 2. In order to solve the equations we must find a way to combine them that elimates one of the variables ( X or y) so that the other can be ...
AR
Answered by Alice R. Maths tutor
12651 Views

What is the trend in reactivity of Group 2 elements with halogens as the group is descended?

In group 2 elements, the reactivity is a measure of how easily the atoms lose outer shell electrons. An atom at the top of the group, such as magnesium, has less shells meaning the atomic radius is smaller, ...
MF
Answered by Maria F. Chemistry tutor
9701 Views

Define electrical resistance

It's often best to use an equation when asked for definitions like this. In this case, use Ohm's law: R = V/I (where V is potential difference, I is current and R is resistance, measured in ohms)
MF
Answered by Maria F. Physics tutor
3502 Views

Describe and explain the photoelectric effect (6 marks)

In the photoelectric effect, the electromagnetic wave is thought to exist as quanta (discrete packets) of energy, called photons. When an EM wave is directed at a metal surface, the photons are absorbed by t...
MF
Answered by Maria F. Physics tutor
17726 Views

Critically assess the view that the concept of miracles is inconsistent with an omnibenevolent God?

The question asks students to critically assess the view of philosophers and religious texts about whether an omnibenevolent (all-loving God) could show favouritism and partiality towards his creation. Stude...
CG
6088 Views