Top answers

How do you answer a questions on how a buffer solution works?

This question would be a 5/6 mark question- marks are displayed throughout You always start by defining what a buffer solution is: A buffer solution is a system that minimises a change in pH on the addition ...
AR
Answered by Alice R. • Chemistry tutor
4464 Views

What is a monopoly?

By technical definition a monopoly is a firm which holds 100% of a market, however in the UK the competition authorities define a legal Monopoly as a firm holding over 25% power within a market. Monopolies a...
MS
Answered by Meerav S. • Economics tutor
21663 Views

What tensions exist within Liberal Democracy?

Liberal democracy is defined as a democratic system of government in which individual rights and freedoms are officially recognized and protected, and the exercise of political power is limited by the rule o...
MS
10810 Views

Two balls of mass 3kg and 7 kg respectively move towards one another with speeds 5ms^-1 and 2ms^-1 respectively on a smooth table. If they collide and join, what velocity do they move off with?

m = 3kg ; 7kg u = 5ms^-1 ; -2ms^-1 (Taking the direction to the right as positive). momentum before = m1u1 + m2u2 = (3x5) + (7x-2) = 1 momentum after = (m1+m2)v2 = (3+7)v = 10v By the principle of conservati...
AG
Answered by Aimee G. • Physics tutor
3947 Views

What is the Mixolydian mode?

Musical 'modes' are basically a set of tonalities deriving from a normal natural major scale. With C major, for example, it seems obvious that one should begin and end on C: C-D-E-F-G-A-B-C. But what if we u...
EG
Answered by Eric G. • Music tutor
4699 Views