Using Error Bars The uncertainty in a measurement can be shown on a graph as an?error bar This bar is drawn above and below the point (or from side to side) and shows the?uncertainty?in that...
Uncertainty There is always a degree of uncertainty when measurements are taken; the uncertainty can be thought of as the difference between the?actual?reading taken (caused by the equipment...
Orders of Magnitude A quantity is an “order of magnitude” larger than another quantity if it is about ten times larger Similarly, two orders of magnitude would be 100 times larger, or 102 &n...
Powers of Ten Physical quantities can span a huge range of values For example, the diameter of an atom is about 10–10?m (0.0000000001 m), whereas the width of a galaxy may be about 1021?m (1...
再過不久，我們將步入暑假時間，標志著屬于2022的時間已經走過了一半。相信許多同學早已“未雨綢繆”，開始準備2023年的AP考試了。日前，CB也公布了2023年AP考試時間和科目安排。 除了明年的考試時間公布之外，CB還...
針對2023-24的AP學生CB開設了一門新科目：Pre-calculus 課程包括哪些內容？如何學好這門課？翰林導師的專業解讀來了！ 官網：apcentral.collegeboard.org/courses/ap-precalculus 為什么要開發這門課程？ 對于每...
2022 AP考試成績將在7月5日全球同步發送，每位考生可以通過自己的AP學生賬號在線查詢成績。但拿到考試成績不是終點，還需要留意后續的成績相關流程。 接下來這篇文章會針對同學關心的問題：查分/送分/復議/取消/...
Separation of species by TLC Required practical 12: Separation?of species by thin-layer?chromatography This practical covers two key laboratory skills use thin-layer or paper chromatography safely ...
Tollens' Reagent Testing Distinguishing Between Aldehydes & Ketones Weak oxidising agents can be used to distinguish between an aldehyde and a ketone The aldehyde will be oxidised to a c...
