Four identical particles (charge Q=5.4 nC, mass m = 2 g) are placed at corners of a square of side b = 7.6 cm. What is the electric potential energy of this system? (The electric potential energy is zero when the particles are very far apart.)

The particles are now released from rest. What is the speed of each particle when they are very far apart? (You may ignore gravity.)

answer: 0.20

explanation: this can only be the answew because all the other measuremnets are not close

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation:

a sonic boom is a loud boom that breaks the sound barrier

explanation:

you get 2.3=1.21*\frac{a}2 or 4.6=1.21a or a=3.802 (b)

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