2. What determines the focal length? (1 point) O the thickness of a lens
O the hardness of a lens
O the curvature of a lens
O the width of a lens

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone,due to its high light availability and warm water temperature

Use the de broglie's wave equation to find the wavelength of an electron moving at 7.3 × 106 m/s. show your work. note: h = plank's constant (6.62607 x 10-34 j s)