How big are the fluctuations (differences in temperature) in the CMB, and what processhas enhanced them by many orders of magnitude?

What are chlorofluorocarbons and what impact do they have on the atmosphere?

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.

What is the coefficient of kinetic friction μk between the block and the tabletop?