And again, choose the best statement below: a. When she pulls in her arms, the work she performs on them turns into increased rotational kinetic energy. b. When she pulls in her arms, her moment of inertia is conserved. c. When she pulls in her arms, her angular momentum decreases so as to conserve energy. c. When she pulls in her arms, her rotational potential energy increases as her arms approach the center. d. When she pulls in her arms, her rotational kinetic energy is conserved and therefore stays the same. e. When she pulls in her arms, her rotational kinetic energy must decrease because of the decrease in her moment of inertia

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.