I don't understand the language.....
The correct ans is 1.
A changing electric field produces a changing magnetic field which in turn produces a changing electric field. This means that the source has created a changing electric and magnetic fields, perpendicular to each other, that travel away from the source. Electric field, magnetic field and the EM wave are perpendicular to each other. This gives electromagnetic waves their transverse nature.
B) no light pass through
Explanation:
An opaque material is a material that does not allow light to pass through. Opaque materials are the most common materials, they do not allow light to pass through.
- All opaque materials will cast shadows along their path when there is a screen.
- Transparent materials allows light to pass through for example glasses.
- Translucent materials allows light to go through partially.
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Answer: D. Quantitative, Independent
Explanation:
Based on the information given in the question, the response variable is quantitative while the sampling is independent.
Independent samples refers to the samples which are randomly selected in such a way that the observations aren't dependent on the values of the other observations.
Quantitative variables refers to the numerical variables which can be in form of percents, counts, or numbers.
Since the city council randomly selects 1000 married couples from the city, then the answer is "Quantitative, Independent".
