Imagine for a Minute That the Moon Is Held in Its

question 138

Short Answer

Imagine for a minute that the Moon is held in its orbit about the Earth by electrical forces rather than by gravitation.What electrical charges -Q on the Earth and +Q on the Moon are necessary to hold the Moon in a circular orbit with a period of 27.3 days? The Earth-Moon distance is 384 000 km and the mass of the Moon is 7.35 * 10²² kg.

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Definitions:

Spinal Cord

The nervous tissue within the spinal column that transmits nerve signals between the brain and the rest of the body.

Conus Medullaris

The tapered, lower end of the spinal cord, occurring around the lumbar vertebral levels 1 (L1) to 2 (L2).

Lumbar Enlargement

A widened area of the spinal cord that gives rise to nerves which innervate the lower limbs.

Cauda Equina

A bundle of spinal nerves and spinal nerve rootlets at the lower end of the spinal cord, resembling a horse's tail.