4. Use the observed pattern to predict the number of energy levels in a neutral atom:

Three point charges, two positive and one negative, each having a magnitude of 20 μc are placed at the vertices of an equilateral triangle (30 cm on a side). what is the magnitude of the electrostatic force on the negative charge

What is the momentum of a 2 kg object moving at 15 meters per second

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.