From the Foreword is infinite in multitude; and I mean by the sand not only that which exists about Syracuse and the rest of Sicily but also that which is found in every region whether inhabited or unhabited. Again there are some who, without regarding it as infinite, yet think that no number has been named which is great enough to exceed its multitude. And it is clear that they who hold this view, if they imagined a mass made up of sand in other respects as large as the mass of the earth, including in it all the seas and the hollows of the earth filled up to a height equal to that of the highest mountains, would be many times further still from recognizing that any number could be expressed which exceeded the multitude of the sand so taken. But I will try to show you by means of geometrical proofs, which you will be able to follow, that, of the numbers named by me and given in the work which I sent to Zeuxippus, some exceed not only the number of the mass of sand equal in magnitude to the earth filled up in the way described, but also that of a mass equal in magnitude to the universe.:
Fundamentals
Conceptual Physical Science Paul G. Hewitt, John A. Suchocki, Leslie A. Hewitt. = 1.6 درجة الحرارة عندما تلمس فرنا ساخنا. تنتقل الطاقة الحرارية إلى يدك، لأن الفرن أسخن منها. ولكن عندما تلمس قطعة من الجليد فإن الطاقة الحرارية تنتقل من ...
Physics with Modern Physics for Scientists and Engineers
A 1.50 kg snowball is shot upward at an angle of 34.0 ° to the horizontal with an initial speed of 20.0 m / s . ( a ) What is its initial CLUSTERED PROBLEMS kinetic energy ? ( b ) By how much does the gravitational potential energy of ...
Wheeler J. C. and Anderson G. R. , 1980 , J. Chem . Phys . 73 , 5778 , ( 287 ) . Wheeler J. C. and Widom B. , 1970 , J. Chem . Phys . 52 , 5334 , ( 165 ) . Whitehouse J. S. , Christou N. I. , Nicholson D. and Parsonage N. G. , 1984 , J.
三线表盘的构造.图 2-5 所示为三线悬盘实验装置的构造示意图。三线悬盘是由一个匀质圆盘(悬盘)用 3 条悬线对称地悬挂在可转动的顶部圆盘下而构成。其中,上、下圆盘均处于水平,悬挂在横梁上。3 个对称分布的等长悬线的悬点位于小于圆盘周界的同心圆圆周上, ...
本书介绍了一种基于量子谐振子物理模型的新的智能优化算法——MQHOA算法,该算法的物理模型明确,算法结构简单,无需复杂的初始条件设定和参数设置 ...
本书为教材。分为数据处理基础、物理实验方法、常用实验仪器使用方法和实验项目等。数据处理基础介绍误差基本理论与处理方法;物理实验方法介绍常用的基本物理实验方法和手 ...
愛因斯坦寫給所有人的科普經典 ═════════════════ 全書沒用到任何數學公式! 介紹從伽利略、牛頓時代的古典理論 到場論、相對論和量子力學的物理學史 ...
Dielectric Physics