derive an expression for the work required by an external agent to put the four charges together as indicated in fig.25 each side of the square has length a

Awoman holds a book by placing it between her hands such that she presses at right angles to the front and back covers. the book has a mass of m = 1.8 kg and the coefficient of static friction between her hand and the book is μs = 0.67. no attempt 50% part (a) what is the weight of the book, fgb in newtons?

Which levels of government establish and implement educational requirements for minors

The substances that are necessary for producing of certain hormones and that store and transport vitamins