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.
One of the most important sources of energy is the sun. The energy of the sun is the original source of most of the energy found on earth. We get solar heat energy from the sun, and sunlight can also be used to produce electricity from solar (photovoltaic) cells
1) Renewable energy
energy from a source that is not depleted when used, such as wind or solar power
2) non renewable energy
A non-renewable resource is a natural resource that cannot be readily replaced by natural means at a pace quick enough to keep up with consumption

Answer:
(1) Skinner’s utopian society ought to be rejected.
Explanation:
The sentence that expresses the conclusion of the argument is, <em>Skinner’s utopian society ought to be rejected</em>. "The sort of society Skinner proposes in Walden Two is a non-competitive, lifeless society that lacks creativity and imagination. It also lacks the conditions that make for festivity and fantasy, two significant human traits. The type of society that Skinner proposes would turn people into robots. Skinner’s utopian society ought to be rejected."
Answer:
In the Norther Hemisphere it would be winter because the seasons differ by 6 months.
Explanation:
Answer:
all of the above are the options