I am vital for navigation and measurement, yet I am abstract. You can see my effects but not my essence. What am I?
Category: Science · Difficulty: hard
Hint: Consider how we understand movement and time.
Answer
A reference frame
Explanation
A reference frame is a perspective used in physics to describe motion and position, essential for calculations.
This is a hard science riddle — a tricky one that takes a little thought. The answer is A reference frame.
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