The diagram below shows the path of a comet around the Sun What is the most significant change in the comet's energy as it moves from point D to point A?

(Assume that total mechanical energy is conserved.)

During takeoff, the sound intensity level of a jet engine is 170db at a distance of 34 m. what's the sound intensity level at a distance of 1.0 km?

Blank liquids and gases exert a buoyant force on objects placed in them

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.