Mass of rubber stopper
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Using MS/MS, we have identified ions at m/z 399, 421, 609.4, and 819.9 as those of tris(2-butoxyethyl) phosphate, originating in the gray rubber stoppers commonly used as closures in commercial sources of peptides and proteins. The compound is readily extracted by contact with organic solvents such as alcohol or acetic acid and even by water alone. Zinc salts of proteins are also observed ...
If the rubber stopper is revolved 15 times in 3.74 seconds and had a mass of 7.2 g, calculate: a) its period b) its speed its centripetal acceleration d) the tension in the string. Calculate the average speed of Pluto in its orbit around the Sun. Compare the tension in the rope of a motionless and a swinging pendulum.