A is a radioisotope added to a stable isotope of the same element to monitor the element's distribution as it progresses through a system.

Describe the interaction that occurs between two objects with the same electrical charge.

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

What was bohr’s contribution to the planetary model