Which of the following questions about the flu is a scientific question? A. Is a flu shot effective in preventing the flu?
B. Is public fear of the flu out of control?
C. Is the benefit of drugs for the flu higher than the cost?
D. Who should receive a flu shot if there is not enough flu vaccine for
everyone?

The correct answer is A. This is because they are asking if the flu shot is necessary and effective to work to prevent the flu. We automatically know B is not the answer because the question is very unnecessary and does not sound like it could be a scientific question. C can’t be it because it’s talking about if the shot is beneficial because of the cost. It also can’t be D because it definitely does not make sense for there not to be a vaccine available for the people who need it for the flu. In this case the best option would be A.

Because electrons have negligible mass, to account for the mass of the isotope, there must be 16 neutrons, 16 neutrally charged, massive, fundamental particles present in the sulfur nucleus. and thus finally, if we have the 32s2− ion, there are 18 electrons, 16 protons, and 16 neutrons.

Following are the  advantages of the parametric equations: 1) they can be used to graph curves that are not functions, like the unit circle.2) the parameter can be used to represent the quantity that is  useful to  provide us with better information about the graph.3)  it is useful to convert between rectangular equations and parametric equations.with specific reference to chemistry,  parametric equations are employ for solving hydrogen and hydrogen-like ions, quantum mechanically. herein, cartesian coordinates are converted in spherical polar coordinates. the solution obtained, when plotted on spherical polar graph paper, provides visualization of atomic orbital such as s,p,d and f.