What is the electric field strength inside the hole at radial distance rr << aa in a plane that is perpendicular to the cylinder through the center of the hole? Hint: Can you create this charge distribution as a superposition of charge distributions for which you can use Gauss's law to find the electric field?

The slope of a velocity time graph over any interval of time gives the during that interval

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.