Dos bloques son acelerados a lo largo de una superficie sin fricción como se muestra en la figura 8. Fuerzas de fricción evitan que los bloques se deslicen uno respecto del otro y los dos se mueven con la misma aceleración. Si F=1.2 N y M=1.0
kg, determine la componente horizontal (magnitud y dirección) de la fuerza de fricción que ejerce el bloque grande sobre
el bloque pequeño.

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

Metals are good conductors of electricity because they