Correct answer only ! while performing an experiment, the student creating the data table is not sure if a measurement from the experiment is a vector or scalar. which question should she ask to determine if a measurement is a vector or a scalar?

The correct answer is:

Does the measurement include direction?

In fact, the basic difference between a scalar and a vector is that a scalar does not have a direction (it only has a magnitude), while a vector has both magnitude and direction. Therefore, if the answer to this question is "yes", it means the quantity is a vector, otherwise it is a scalar.

the answer is d. 4

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absorption lines are where light has been absorbed by the atom thus you see a dip in the spectrum whereas.

emission spectra have spikes in the spectra due to atoms releasing photons at those wavelengths.

explanation: