List various ways through which AIDS spreads
please its aurgent fast

How is the gravitational force related to the distance between two objects?

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.

What sort of waves exhibit the doppler effect?