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David Schutz
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What is the velocity of a person's blood flow relative to the earth?
Spacetime is a concept in physics that combines the three dimensions of space and the dimension of time into a single four-dimensional continuum.
Einstein's theory of general relativity states that gravity is not a force between masses, but rather a curvature of spacetime caused by the presence of mass or energy.
Space refers to the three dimensions of length, width, and height, while spacetime includes the dimension of time. Spacetime is a more comprehensive concept that describes the fabric of our universe.
Objects with mass or energy cause distortions in the fabric of spacetime, which affects the path they take through space. This is what we perceive as gravity.
According to Einstein's theory of general relativity, spacetime can be warped by the presence of mass or energy. There is also ongoing research on the potential for manipulating spacetime through advanced technologies, such as wormholes or warp drives.