g What is the electric field a distance 0.33 m above the center of a thick ring of charge having inner radius 0.02 m and outer radius 0.43 m, with charge distribution 12.5 nC/m^2

If steel is more dense that lake water, why can a boat float

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.

If a star is moving toward earth, it is