Which factor affects gravitational potential energy but not elastic potential energy? spring constant velocity distance mass

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 of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron

Provides most of the energy used in the world today. question 4 options: wind fossil fuel moving water sunlight