4. going down the freeway you notice your tachometer reads 4,000 rpm. a) convert
this frequency into rps? b) use your answer from 'a' to find the period of rotation (how
long it takes your engine to spin just once)? answer in seconds.

a). Frequency = (4,000 rev/minute)·(1 minute/60 sec) = 66 and 2/3 rev/sec

b). Period = 1 / frequency

Period = 1 / (66-2/3 rev/sec)

Period = 1/66-2/3  sec/rev

Period = 0.015 sec/rev

depends on what you mean by "group." for order, it would be coleoptera (beetles). for class, it would be insecta (insects). for phylum, it would be the arthropoda (animals with jointed exoskeletons).

explanation: