What are the functions of a proton?

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?

What is the power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery

Which type of energy is transferred by convection currents?