Jumpering out the resistors in a resistance-controlled three-speed fan will cause the motor to
a. run at highest speed.
c. run at lowest speed.
b. run at medium speed.
d. stop immediately

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

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 thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th