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Home Q & A Board Science-Related Homework Help Physics
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staedtler staedtler
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7 years ago
What is the difference between dark matter and dark energy?
A)   Dark matter exists today, whereas dark energy existed only until the strong nuclear force became a separate force at the Planck time.
B)   Dark energy is the energy emitted by dark matter, much as luminous energy (light) is emitted by visible matter.
C)   There is no difference: Energy has mass by E = mc2, and dark matter and dark energy are two names for the same effect.
D)   Dark matter is attractive and slows the universal expansion, whereas dark energy is repulsive and accelerates the universal expansion.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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papachulopapachulo
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staedtler Author
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6 years ago
I really appreciate your help!
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