Scientific knowledge is empirical.
<h3>What is scientific knowledge?</h3>
These are established knowledge, used to explain a behavior of interest, which are of great importance to humanity.
It is to be noted that that scientific knowledge are empirical because they evolve over time as they evaluate current realities and explanations as new data and technology become available.
Learn more about scientific knowledge here: brainly.com/question/13159281
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I would say that the main purpose of the European Union is to strengthen the economy of the member states by merging their economies and by introducing one stronger, common economy - a stronger economy for the states means a better comfort of life in those states.
Katherine's opportunity cost of attending the lecture is: the transportation and time cost of getting to the lecture event itself plus the reduction in her physics exam grade by not studying tonight.
<u>Explanation</u>:
The opportunity cost is the "cost" lost by not enjoying the benefit associated with the chosen alternative choice. People usually make use of opportunities to make themselves better.
The opportunity cost can be explained as giving up of profit or value to achieve something else. Opportunity cost is the value of giving up the best thing whenever you make a decision. When Katherine decided to attend the lecture of her favorite author, she lost her time, transportation cost and even scored low grade in physics exam as didn’t study on exam night.
