When the figure skater had her arms out, she was spinning slowly. The more she pulled her limbs in, the faster she spun. Why did she start spinning faster when she pulled her arms in?

 She spun faster because her mass was closer to her center of rotation. The rate of spin increased to conserve angular momentum.

Explanation:  plato answer

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

no u