Opposite doesn't mean completely different, it means the antithesis of.
Dark is the opposite of light. It isn't merely different from light, it is defined as the absence of light. The word "dark" literally means, "not light."
The moon is completely different from a frog, but they're not really opposites of each other. The moon is not a frog, granted, but it isn't defined by being not a frog. Its definition has no relationship to a frog, so it isn't the opposite of a frog. Likewise, its definition has no relationship to light or dark, which is why it isn't the opposite of those things, despite being completely different from them too.
They attract each other. Thus the saying, 'opposites attract'
True. According to Newton's third law of motion, action and reaction forces always act on different objects and have equal magnitudes but opposite directions. So, when these forces act in opposite directions on different objects, they effectively cancel each other out.
An object can still move even if the action and reaction forces are equal because they act on different objects. The equal forces produce opposite accelerations on the two objects, causing them to move in opposite directions. This is described by Newton's third law of motion.
Force pairs refer to the equal and opposite forces that two interacting objects exert on each other. This is in accordance with Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. The force pairs act on different objects and have the same magnitude but opposite directions.
Gravity and radiation are not really opposites. Gravity is a force that attracts objects with mass towards each other, while radiation refers to the emission of energy in the form of waves or particles. They are distinct phenomena that operate independently of each other in nature.
Coral is a physical object, and physical objects do not have opposites.
Nouns describing objects do not have opposites. "Unncumbered" is the opposite of "burdened" (if by luggage you mean something that is a burden)
Calculators do not have opposites because they are inanimate objects that serve a unique purpose (to answer math questions).
You can have an opposite of a property, such as "big", "fast", "silly", but in most cases it doesn't make much sense to talk about opposites of objects.
Most words do not have antonyms. Concrete objects are especially unlikely to have opposites. 'Homestead' has no opposite.
There is no such thing. It makes sense to talk about opposites of simple properties (adjectives), such as "fast", "clever", etc.; in general, it doesn't make so much sense to talk about the opposites of objects (nouns).
This user would say it isn't, since to linger is to stay longer, while to maintain, is to keep longer. You might say they have different objects (or subjects), but are not opposites. A better opposite of maintain (as in "maintain control") might be to lose, and you could oppose linger with to leave.
Antonym means opposite, and not all things have opposites. Astronomy is the study of celestial objects, and you can't really anti-study anything. The most you can do is simply to ignore it. But study and not-study aren't opposites.
They attract each other. Thus the saying, 'opposites attract'
An antonym is an opposite, and while reptiles and amphibians are very different they can't be considered opposites because not every aspect of them are opposites. For example, there are both reptiles and amphibians that lay eggs. Generally, there are no antonyms for nouns (objects/organisms). Antonyms are most often used with adjectives, adverbs and verbs. Ex: dirty/clean
True. According to Newton's third law of motion, action and reaction forces always act on different objects and have equal magnitudes but opposite directions. So, when these forces act in opposite directions on different objects, they effectively cancel each other out.
Opposites attract