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Calculate the diameter of a circle with area 80cm^2 to two significant figures.

First you need to remember the equation area of a circle = πr 2 with r being the radius. Therefore as we are given the area of the cicle we need to rearrange the equation to give us the radius. Therefore thi...
MS
Answered by Matthew S. • Maths tutor
4409 Views

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 d 2 x/dt 2 +(dx/dt * c/m) + kx/m =0. First, substitute the known constants (m,k,c) to get d 2 x/dt 2 +0.2dx/dt + 24x =0. The auxil...
CK
3033 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 cod...
MZ
2154 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 until he...
CG
Answered by Christie G. • English tutor
4097 Views

Solve the following equation. 7x^2 = 13x +2

First gather all x terms on left hand side,7x 2 -13x-2=0. Since 7 is a prime number we can begin factorisation,(7x+/-?)(x+/-?)=0. We know there must be a +/-2 and +/-1 in place of the question mark as they m...
LS
Answered by Lewis S. • Maths tutor
3822 Views