A disk rotates about its central axis starting from rest and accelerates with constant angular acceleration. At one time it is rotating at 12 rev/s. 50 revolutions later, its angular speed is 16 rev/s. (a) Calculate the angular acceleration. rev/s2 (b) Calculate the time required to complete the 50 revolutions mentioned. s (c) Calculate the time required to attain the 12 rev/s angular speed. s (d) Calculate the number of revolutions from rest until the time the disk attained the 12 rev/s angular speed.

Calculate the ratio of h+ ions to oh– ions at a ph = 6. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 6. are they the same? why or why not? record your explanation in table a. what is the concentration of h+ ions at a ph = 6? mol/l what is the concentration of oh– ions at a ph = 6? mol/l what is the ratio of h+ ions to oh– ions at a ph = 6? : 1

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