Breanna is standing beside a merry-go-round pushing 19° from the tangential direction and is able to accelerate the ride and her friends from rest to a frequency of 10 rpm in 9 seconds. assume the merry-go-round is a uniform disc of radius 2.3 m and has a mass of 750 kg. rachel (48 kg) and tayler (46 kg) sit opposite each other on the edge of the ride.

(a) what for did breanna push with?
(b) how much work did breanna do?

Acommon technique in analysis of scientific data is normalization. the purpose of normalizing data is to eliminate irrelevant constants that can obscure the salient features of the data. the goal of this experiment is to test the hypothesis that the flux of light decreases as the square of the distance from the source. in this case, the absolute value of the voltage measured by the photometer is irrelevant; only the relative value conveys useful information. suppose that in part 2.2.2 of the experiment, students obtain a signal value of 162 mv at a distance of 4 cm and a value of 86 mv at a distance of 5.7 cm. normalize the students' data to the value obtained at 4 cm. (divide the signal value by 162.) then calculate the theoretically expected (normalized) value at 5.7 cm.