Show, by differentiating components, that (a)

d

dt

(A · B) =

dA

dt

· B + A ·

dB

dt
(b)

d

dt

(A × B) =

dA

dt

× B + A ×

dB

dt

,

just like the derivative of the product of two algebraic functions​

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

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

Ne way in which elements differ from each other is the structure of the electron cloud in each element's atoms. in an electron cloud, an electron that is farther away from the nucleus has