how do i win in Chemistry By lucas posso romo Thu, 03/16/2017 - 12:26 ChemistryA-Levels 2 The best tip for any revision is to start with the past exam papers and work back from that. Otherwise you will spend a lot of time revising the wrong stuff, or the right stuff in the wrong way. All past papers and mark schemes are available for free for you to download. You need to know your exam board and specification, but you can start here:- Edexcel - http://qualifications.pearson.com/en/support/support-topics/exams/past-p... OCR - http://www.ocr.org.uk/i-want-to/download-past-papers/ AQA - http://www.aqa.org.uk/exams-administration/exams-guidance/find-past-pape... Tabitha Farrant Thu, 03/16/2017 - 12:47 Also, find a million revision tips to make sure you spend your time effectively herehttp://www.s-cool.co.uk/content/revision-secrets-no-end-insider-tips-psy... Tabitha Farrant Thu, 03/16/2017 - 12:49
Why didnt i do a degree in geography? By Emily Durber Tue, 03/14/2017 - 12:51 GeographyA-Levels 1 Yes - surely - although I am not an expert. Where else can the water go? Tabitha Farrant Tue, 03/14/2017 - 15:56
explain how heart action is initiated and controlled By trust mambemba Thu, 03/09/2017 - 14:29 BiologyA-Levels 1 Sorry if this is too complex, but it give you the idea. Pacemaker cells in the sinoatrial node, located over the right atrium, initiate the cardiac cycle. Systole begins when excitation spreads over both atria, activating atrial contraction. Excitation spreads to the atrioventricular node, near the atrioventricular border, from which excitation is conducted by the bundle of His and the Purkinje system (groups of specialized muscle cells) to the bottom of the ventricles. Excitation spreads upward in the ventricles, contracting them from the bottom up, like squeezing a toothpaste tube from the bottom. When the action potentials end, diastole (relaxation) begins, until excitation is again initiated by the pacemaker cells of the sinoatrial node. Tabitha Farrant Thu, 03/09/2017 - 17:46
explain the use of an operational amplifier as a schmit trigger By Amity Mukombami Thu, 03/09/2017 - 08:25 PhysicsA-Levels 1 Have a look herehttps://www.quora.com/How-does-a-Schmitt-trigger-circuit-work Tabitha Farrant Thu, 03/09/2017 - 17:47
explain the use of an operational amplifier as a schmit trigger By Amity Mukombami Thu, 03/09/2017 - 08:25 PhysicsA-Levels 0
a ball rolls from rest down in an incline with a uniform acceleration of 4ms By Cydel Terubea Sun, 03/05/2017 - 01:29 PhysicsA-Levels what is its speed after 8sec? how long will it take to reach a speed of 36ms? 1 v = u+a.t U= initial velocity = 0 So v = a.t a=4, t=8. Pop in the numbers and get the answer Rearrange v=a.t to get t =v/a Velocity required = V = 36. a=4 Pop in the numbers and get the answer For distance you have to use s=ut + 0.5a.(t.t) (t.t) = t squared initial velocity u=0 so ut = 0 Rearrange to get t = ???? Pop the numbers in to get the answer To get the speed after that time, use v = a.t again as per the start of the question Finally to get distance (s) travelled in the 3rd second, find out the speed at the start (t=2) of that second using the techniques above. That will be u, initial velocity for this part of the question. Then use s=ut + 0.5 a(t.t) to get the distance, s. Tabitha Farrant Mon, 03/06/2017 - 10:09
discuss the statement"assisting small firms is unecomics because it goes against economies of scale" By Kudakwashe Mutsena Sat, 03/04/2017 - 15:51 Business StudiesA-Levels 0
how can the concept of price elasticity of demand, cross elasticity of demand and income elasticity of demand used in decision making???? By Razinah Maudarbux Thu, 03/02/2017 - 14:23 EconomicsA-Levels 1 Have you had a look here?http://www.s-cool.co.uk/a-level/economics/elasticitieshttp://www.s-cool.co.uk/a-level/business-studies/marketing-planning/revi... Tabitha Farrant Fri, 03/03/2017 - 09:39
HELP....DECISION TREES/MAKING By Bart Simpson Mon, 02/27/2017 - 20:20 Business StudiesA-Levels PLEEAASEE... 1 Hi Bart - try this pagehttp://www.s-cool.co.uk/revise-it/strategy-0 Tabitha Farrant Tue, 02/28/2017 - 10:22
what are the causes of market failure??? By Razinah Maudarbux Mon, 02/20/2017 - 16:41 EconomicsA-Levels 1 Have you had a look here? http://www.s-cool.co.uk/a-level/economics/market-failure/revise-it/what-... Tabitha Farrant Tue, 02/21/2017 - 09:47
