How much energy is needed to raise the temperature of a 55g sample of aluminum from 22.4 to 94.6?

What is the final velocity of the initial velocity of 25 and -50?

Why should seat belts not be mandatory quick plz

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?