Theories and Experiments The goal of physics is to develop theories based on experiments A theory is a \guess,\expressed mathematically, about how system works The theory makes predictions about how a system should work Experiments check the theories' predictions Every theory is a work in progress

Evicting einstein ScienceaNASa a physics experiment on the drawing board for the International Space Station could help find the grand unifying\Theory of Everything March 26, 2004: Sooner or later, the reign of Einstein, like the reign of Newton before him, will

INTRODUCTION CHAPTER 1 Milk Production and Biosynthesis CHAPTER 2 Milk Grading and Defects CHAPTER 3 Dairy Chemistry and Physics CHAPTER 4 Dairy Microbiology CHAPTER 5 Dairy Processing Clarification, Separation, Standardization Pasteurization UHT Treatment Homogenization Membrane Processing Evaporation and Dehydration Production and Utilization of Steam and Refrigeration CHAPTER 6 Dairy Products Overview and Fluid Milk Products Concentrated and Dried Milk Products Cultured Dairy Products Whipped Cream Ice Cream Butter Manufacture APPENDIX Glossary of Terms

Vocabulary 1 (paragraph 1--3) 1. heat treatment n.热处理 2. embrace v.包含 3. metallurgy n冶金,冶金学 4. physics n.物理学 5. chemistry n化学

Foreword plinary nature of food irradiation, involv. This reference guide is an ABC on food irradiation on ing branches of science such as microbiology, chemistry, the one hand and an encyclopedia of food irradiation on physics and nuclear technology, toxicology and nutri- the other. The authors have painstakingly compiled all

That streams of electrons possess the properties of beams of waves was dis- covered early in 1927 in a large industrial laboratory in the midst of a great city, and in a small university laboratory overlooking a cold and desolate sea. The coincidence seems the more striking when one remembers that facil- ities for making this discovery had been in constant use in laboratories throughout the world for more than a quarter of a century. And yet the coincidence was not, in fact, in any way remarkable. Discoveries in physics are made when the time for making them is ripe, and not before; the stage is set, the time is ripe, and the event occurs-more often than not at widely separated places at almost the same moment

第一部分绪言 一、高中物理奥赛概况 1、国际(International Physics Olympiad0简称IPh) ①1967年第一届,(波兰)华沙,只有五国参加。 ②几乎每年一届,参赛国逐年增加,每国代表不超过5人。 ③中国参赛始于1986年的第十七届,此后未间断,成绩一直辉煌。 ④1994年第二十五届,首次在中国(北京)承办

4.1 General introduction to ocean physics 4.2 Ocean current 4.3 Air-sea interaction 4.4 Climatic influence 4.5 Thermohaline circulation

§4.1自由电子按能量的分布 §4.4能带导体和绝缘体 §4.5半导体

§2.1薛定谔得出的波动方程 §2.2无限深方势阱中的粒子 §2.3势垒穿透 §2.4谐振子