Particles q1, q2, and q3 are in a straight line. Particles q1 = -1.60 x 10-19 C, q2 = +1.60 x 10-19 C,
and q3 = -1.60 x 10-19 C. Particles q1 and q2 are
separated by 0.001 m. Particles q2 and q3 are
separated by 0.001 m.
What is the net force on q2?
Remember: Negative forces (-F) will point Left
Positive forces (+F) will point Right

Planck decided to assume that atoms could only vibrate at certain frequencies that were whole numbers eg 2f, 3f and so on. others used to think that atoms vibrate continuously

Answer: 1.4 seconds which is the third optionexplanation: current is defined as the flow of charge per timetherefore, the equation that relates current, charge and time can be expressed as follows: i = δq / δtwhere: i is the current given = 1.8 ampereδq is the charge given = 2.5 coulombδt is the time required for the flow of the given charges to give the 1.8 ampere.substitute with the givens in the above equation to get the time as follows: 1.8 = 2.5 / δtδt = 2.5 / 1.8 = 1.38888 which is approximately 1.4 secondshope this was !

F  you double the  force, you double the acceleration, but  if  you double the  mass, you velocity. all bodies accelerate at the  same  rate regardless of size or  mass.