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 =  

heats surface water up

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y