Asmall mass m starts from rest and slides from the top of a fixed sphere of radius r. a. if the sphere is frictionless, at what angle theta from the vertical does the mass leave the surface? b. suppose there is friction between the mass and the sphere with friction coefficient meu_s =0.1. what is the minimum angle theta_min at which the mass will start to slide along the sphere? c. the mass is now placed just past this minimum angle and released. the coefficient of kinetic friction meu k is small but not zero. does the mass fly off at a larger or a smaller theta than found in part (a)? assume theta is defined with respect to the top of the sphere.

the answer is d. 4

hope this

also the more points you give the faster your questions get answered

in physics zero. in muscle fatigue could be high

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)

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 !