"unclear" and "difficult to understand" are both definitions of the word "obscure."
The dielectric is the term used to describe the insulating layer that lies between a capacitor's plates. Capacitors prevent a change in voltage across the two plates because they have a charge storage area between them. A capacitor can be charged with direct current but not through it. A capacitor's capacitance is a measurement of how well it can hold charge between two plates.
There are three fractions: 1/4, 1/8, and 1/2. They must be added in order to answer the questions. Because the common denominator is 8, we can express each of them as follows:
½ + ¼ + 1/8 = 4/8 + 2/8 + 1/8 = 7/8
The dog is taken care of 7/8 of the time by the first three people. As a result, to calculate the percentage of Magi's time required to care for the dog:
8/8 - 8/7 = 1/8
The typical state of metals at room temperature is that of solids, while the typical state of nonmetals is that of gases.
The first and third answer options are only briefly mentioned. The fourth is discussed, but it is covered by the passage's more general goal of explaining why the Amazon Rainforest is an important region that needs to be protected.
The electric force that exists between two charged particles is characterized by Coulomb's law. It says that charges that are similar to each other repel each other, while charges that are opposite to each other attract each other, and the further apart they are, the less force they exert on each other.
Brandish means to wave menacingly.
