Acart of mass m can move without friction on an air track. initially, it is at rest. then, for a limited time delta t, it is pushed down the track with a constant force f. which of the following statements are true? when you stop pushing, the cart starts slowing down again the higher the mass of the cart, the harder you have to push to achieve the same final speed in the same amount of time. you exert a larger force on the cart than the cart exerts on you. leaving all other quantities unchanged, what happens in the scenarios below? bullet if you use a cart with half the mass, you cover distance during pushing. bullet if you use half the force, you reach final speed. bullet if you push half as long, you cover distance during pushing. bullet if you use a cart with half the mass, you reach final speed.

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”.

hope this !

conduct current i mean it makes sense