Whether or not adult Catholics attend Mass regularly, they strongly bond with it. Within a single generation, English-speaking Catholics experienced the Second Vatican Council's authorization for the fi rst overhaul of the liturgy in four hundred years, and then, in 2011, they prepared for and implemented a revised vernacular translation. Each of these two events awakened strong feelings-and no small amount of lament from other Christian bodies who share the basic structure and content of the Roman Catholic Mass-as people gradually became aware that someone else's decision was going to affect the cornerstone of their spiritual life. In Whose Mass Is It? Paul Turner examines the impact of the Mass, the connections it makes, and its purpose in the lives of believers.

This second edition of Mass Metrology: The Newly Defined Kilogram has been thoroughly revised to reflect the recent redefinition of the kilogram in terms of Planck’s constant. The necessity of defining the kilogram in terms of physical constants was already underscored in the first edition. However, the kilogram can also be defined in terms of Avogadro’s number, using a collection of ions of heavy elements, by the levitation method, or using voltage and watt balances. The book also addresses the concepts of gravitational, inertial and conventional mass, and describes in detail the variation of acceleration due to gravity. Further topics covered in this second edition include: the effect of gravity variations on the reading of electronic balances derived with respect to latitude, altitude and earth topography; the classification of weights by the OIML; and maximum permissible error in different categories of weights prescribed by national and international organizations. The book also discusses group weighing techniques and the use of nanotechnology for the detection of mass differences as small as 10-24 g. Last but not least, readers will find details on the XRCD method for defining the kilogram in terms of Planck’s constant.

Matter and Interactions offers a modern curriculum for introductory physics (calculus-based). It presents physics the way practicing physicists view their discipline while integrating 20th Century physics and computational physics. The text emphasizes the small number of fundamental principles that underlie the behavior of matter, and models that can explain and predict a wide variety of physical phenomena. Matter and Interactions will be available as a single volume hardcover text and also two paperback volumes. Volume One includes chapters 1-12.