Acertain alarm clock ticks four times each second, with each tick representing half a period. the balance wheel consists of a thin rim with radius 0.53 cm , connected to the balance staff by thin spokes of negligible mass. the total mass of the balance wheel is 0.80 g .

Explanation:

Assuming that we have to calculate moment of inertia of balanced wheel about the shaft.

mass of balanced wheel = 0.80 g

radius of the rim = 0.53 cm

moment of inertia (I) =

=

=

therefore, MOI of the wheel =  

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:

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it