Which property of argon makes it useful for potassium-argon dating? It decays into potassium.

It is an unstable element.

It remains trapped in rock.

It is useful only for dating newer rock.

Please help 100 points

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 situation will produce the greatest change of momentum

Infrared radiation has wavelengths that are shorter than visible light is part of the visible light spectrum has wavelengths that are longer than visible light has the same wavelengths as ultraviolet radiation