A hypothetical Laplacian machine could predict the future by calculating the trajectories of all the particles in the universe. This idea has been used to argue against the possibility of human free will. But if we had such a machine, we could ask it to predict how a human answers a certain question and, after hearing the prediction, the human could freely choose to answer in such a way as to make the prediction wrong. In this thought experiment:

A150 w lamp emits light of wavelength 590 nm uniformly in all directions. what is the photon flux (photons per unit area per unit time) on a small screen at a distance 2.3 m from the lamp? assume the photons are uniformly distributed over the surface of a sphere of radius 2.3 m.

Laboratory experiments, observational field studies, and model-building are all examples of different forms of scientific investigations.  in what way do laboratory experiments primarily differ from other forms of scientific investigations?   a.  a laboratory experiment is the only accepted form of investigation within the scientific community.  b.  studies about how things behave in nature or studies involving very large objects are best answered through laboratory experiments.  c.  laboratory experiments involve the identification and control of variables.  d.  data can only be generated through laboratory experiments, not other forms of investigation.

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant