27. A common housefly (Musca domestica) in a top corner of a 7.0 m X 10.0 m × 3.5 m room walks to the lowest opposite corner of the room. a. What will be the magnitude of its net displacement after its epic trip? b. If the fly walks only along the edges of the room, what is the shortest distance it must walk? c. If it is not restricted to the edges, what is the distance of the most direct route the fly must walk to reach its destination? d. Name the surfaces that the fly crosses in Part c.

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A: Temperature of the stars cannot be measured directly as they are very far.

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Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.