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.)

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.