If the air temperature is the same as the temperature of your skin (about 30 ∘c), your body cannot get rid of heat by transferring it to the air. in that case, it gets rid of the heat by evaporating water (sweat). during bicycling, a typical 72.0 kgperson’s body produces energy at a rate of about 501 w due to metabolism, 78.0 % of which is converted to heat. [recall that the normal internal body temperature is 98.6 ∘f and the specific heat capacity of the body is 3480 j/(kg⋅∘c) .] part a by how much would the body temperature of the bicyclist increase in an hour if he were unable to get rid of the excess heat? part b find out, how high a fever would it be equivalent to, in ∘f? part c is this temperature increase large enough to be serious?

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

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 !