How many turns are needed in a solenoid of radius 10 cm and length 20 cm for its self-inductance to be 6.0 H? A) 30
B) 74
C) 500
D) 550
E) 5500

The consumption of fossil fuels could be

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 would be the strength of earth's gravitational field at a point where an 80.0 kg astronaut would experience a 80% reduction in weight