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.
Question 2
An alpha particle (charge = +2e) is sent at high speed toward a gold nucleus (charge +79e). What is the electrical force acting on the alpha particle when it is at a distance of 2 10-14 m away from the gold nucleus? (e = 1.6 10-19 C)
This is a view of the moon transiting
Uranus's aurorae against its equatorial rings, imaged by the Hubble telescope. Unlike the auror
Major Impacts on Mercury and on Our Moon
In 1979 Islamic militants held American embassy workers hostage in Tehran.
Formation of the Early Earth
Internal and external forces on the parties