Question 11 of 20 A race car sits at the starting line on a racetrack. When the race starts, the car's tires exert a force on the track. According to Newton's third law of motion, what prevents the race car from sinking into the track? O A. The track surface exerts a force that is larger and in the same direction as the force exerted by the tires. B. The force of friction between the car tires and the track prevents the car from moving. C. The track exerts a force that is equal and in the opposite direction as the force exerted by the tires. D. A normal force that is equal in magnitude and opposite in direction to gravity pushes on the car. ​

as technology advances, new experiments often expose problems in accepted theories. c

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-lavira: )

bacteria that live on the ocean floor are sustained by phytoplankton. phytoplankton, microscopic marine photosynthetic organisms, have a vastly significant role to play not only in the marine food web of which they’re part of, but also on a more global scale. despite their infinitely small size in comparison to other marine organisms, these tiny creatures occupy an immensely important ecological niche: they are the foundation of the marine food web, and as primary producers, play key roles in supporting all other organisms in the marine environment, as well as in the regulation of the earth’s climate through the sequestration of carbon, oxygen production, and other related processes. phytoplankton account for roughly half of all global primary productivity; therefore, their significance extends far beyond the marine environment alone. there is an intriguing sense of irony in the realization that these tiny living beings that often live out their existence unnoticed and undetected by the rest of the world, have such a far-reaching impact on the lives of virtually all other living organisms on the planet, particularly on those in the marine environment. the world that we have become accustomed to has been and is continuously shaped by the workings of these miniscule yet vital “plants of the sea”.

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