11) An airplane is moving at a net force of zero. This means the airplane is
A. slowing down and losing altitude
B. moving at a constant speed and losing attitude
C. slowing down and traveling along a straight line
D. moving at a constant speed and traveling along a straight line

This is a form of winter precipitation. it is frozen precipitation falling as ice pellets. snowflakes melt into raindrops as they pass through a thin layer of warmer air. the raindrops then refreeze into particles of ice when they fall into a layer of sub-freezing air near the surface of the earth. this precipitation is called a) hail. b) rain. c) sleet. d) snow.