Search our library of A Level questions

Top answers

All subjects

A Level

A mass m=1kg, initially at rest and with x=10mm, is connected to a damper with stiffness k=24N/mm and damping constant c=0.2Ns/mm. Given that the differential equation of the system is given by d^2x/dt^2+(dx/dt *c/m)+kx/m=0, find the particular solution.

The system is described by a homogeneous, second order differential equation d²x/dt²+(dx/dt * c/m) + kx/m =0. First, substitute the known constants (m,k,c) to get d²x/dt<...

Answered by Christodoulos K. • Further Mathematics tutor

2664 Views

can you explain the multi-store model of memory

This model was devised by Atkinson and Shiffron and outlines the three permanent structures of memory to be the sensory register, short-term and long term memory. Each of these structures differ in their ...

Answered by Mikaela Z. • Psychology tutor

1869 Views

How does Shakespeare explore the theme of tragedy in Act 3 Scene 7 of King Lear?

Although the scene is underlined with cruelty and chaos, by the close, it marks the beginning openness and sanctity for Gloucester. There is no hope for Gloucester’s character to progress positively...

Answered by Christie G. • English tutor

3583 Views

Give three differences between the structures of RNA and DNA

DNA has a double helix structure, RNA is usually single-stranded DNA is stable, RNA is very unstable DNA is longer, RNA is generally shorter DNA contains Thymine, RNA contains Uracil DNA contains a deoxyr...

Answered by Shannon M. • Biology tutor

2516 Views

‘The Second World War was the most important turning point in the development of African American Civil Rights.’ How far do you agree with this view of the period from 1865 to 1992?

I would explain that when structuring the essay you have to work through it in a thematic order and therefore could structure the essay socially, economically and politically when assessing the central fa...

Answered by Yasmin H. • History tutor

3595 Views