Two identical 15 g particles each carry 5.0 mC of charge. One is held fixed, and the other is placed 1.0 mm away and released.
a) Find the speed of the moving charge when it's 1.0 cm from the fixed charge. Express your answer to two significant figures and include the appropriate units.
b) Find the speed of the moving charge when it's 1.0 km from the fixed charge. Express your answer to two significant figures and include the appropriate units.