Ablock is balanced on top of a frictionless sphere of radius r. when the block is given a slight nudge it starts to slide down the surface of the sphere. how far (measured vertically) below the top of the sphere does the block lose contact with the surface of the sphere?

When a neutral charge, comes into contact with a positive charge they repel each other nothing happens the neutral charge becomes negative they attract each other

High schoolphysics 5+3 pts a neon light consists of a glass tube with metal wires at each end. when connected to a high-voltage source, the gas glows. if a fly lands on the glass tube, what will most likely happen? a) the fly will not feel a shock because the glass conducts any free electrons back into the gas. b) electrons will flow directly from the metal wires along the glass and shock the fly. c) the fly will not feel a shock because the glass insulates it from the electrons in the gas and the metal. d) electrons that are moving through the gas will be conducted through the glass and shock the fly.

If you put a helium-filled balloon in the refrigerator, what will happen?