The Elements: A Very Short Introduction

The Elements: A Very Short Introduction

... this glass tube, evacuated of air, a negatively charged and heated metal plate emitted a beam - a 'cathode ray" - that could be focused and accelerated by its attraction ... radiation 'radioactivity'. They found that another heavy element, thorium, was also radioactive, and deduced that natural uranium ore (pitchblende) contained other r...

Ngày tải lên: 20/02/2014, 16:46

The meaning of life: A very short introduction

... On the contrary, he thought it far more important than talk about factual states of affairs. It was just that language could not represent the world as a whole. But though the value and meaning ... Alasdair MacIntyre has observed, is a stranger to love. 27 The assumption that the meaning of life is primarily an individual affair is still alive and well. Julian Baggini write...

Ngày tải lên: 11/01/2014, 18:45