The validity of the hypothesis cannot be confirmed or refuted from only one experiment. By using a series of experiments, the human error or measurement error is reduced to a minimum. Furthermore, more than one factor can be used to determine the validity of the hypothesis.
I will respond to this student that the experiment needs to be repeated multiple times before a conclusion can be drawn! Also, the data will refute or confirm the validity of the hypothesis and not the researcher's own opinion/rational.
The thing that would mostly make the results of the experiment invalid would be the students themselves. No one is built the same, and the exact same food can have very different effects on different people.
The right answer is 2 and 3.
The applications of spectroscopy are very diverse; they are in many areas: fundamental physics, astrophysics, nuclear physics, plasma physics, solid state physics, materials science, metrology, microelectronics, new light sources, laser isotope separation, and so on. The R.M.N. provided a very powerful medical imaging technique. Other analysis techniques are similar to spectrometry, in the sense that a spectrum is measured as a function of energy or frequency. Acoustic spectroscopy concerns pressure vibrations for which the notions of frequency and wavelength are similar, although the phenomenon is of a nature quite different from electromagnetic waves. Here again, the frequency range extends far beyond the audible frequency range, from infrasound to ultrasound. Mass spectrometry produces spectra as a function of the mass-to-electric charge ratio of atomic or molecular ions.
The answer would be Four.
Answer:
Advantageous
Explanation:
Natural selection acts on traits that are advantageous, thus increasing chances of survival and passing on the trait.
