Scholastic GCSE Grades 9-1: Physics AQA Revision Guide
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Price: £6.74
Brand: Scholastic
Description: Inside this Revision Guide you'll find everything you need to succeed in the new GCSE 9-1 Physics. It is packed full of tips and tasks to make sure you really know and understand the key revision points. Written by Science experts and combined with cutting edge technology to help you revise on-the-go. Scholastic GCSE Grades 9-1: Physics AQA Revision Guide - shop the best deal online on thebookbug.co.uk
Category: Books
Merchant: Scholastic
Product ID: 111684
ISBN: 9781407176758
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Author: chsg_lrc
Rating: 5
Review: Such a well thought out guide.Easy to comprehend and use. Made for students of all levels Marking scheme information and guidance in student friendly language The App is easy to use, provides a personalised revision timetable as well as an exam timetable too. Tests and revision cards that can be done whilst sitting on the bus! - no wifi or data required!!
Author: Amazon Customer
Rating: 2
Review: I'm sceptical about the accuracy of some statements, or maybe the statements are poorly worded. I was a little worried when I found the 'error' sticker in the front about series/parallel circuits! Glancing through the book I was concerned at page 34 'Mains Electricity' where it states: 'Circuits in the mains electricity supply are wired in parallel. This means that the live wire of an appliance could still be connected (and dangerous) even if the switch in the mains circuit is open (off).' Then there is a 'Check It'! question... 'Explain why the live wire in the cable of a kettle could still be dangerous even if the electric kettle is turned off.', the answer being: 'Because this is always at a potential of about 230v, so if a fault occurs and the user touches the live wire or the metal casing of the kettle (if it is touching the live wire), this could electrocute the user.' I don't think this is the case, but maybe I'm wrong? If the switch on the kettle if off, then the 'live' (+ve) wire to the kettle clearly has the potential to electrocute someone, bit if the switch at the wall if off (assuming it's correctly wired) then the 'live' (+ve) wire to the kettle will be 'dead' (assuming that the 'neutral' (-ve) wire is at ground potential (at or near 0v)) because the circuit is broken by the wall switch. Or have I got it wrong? Either way, I don't like the way things are explained. Please leave a comment if I'm wrong (or otherwise).
