16. the main difference between the internal combustion engine and the diesel engine is that the diesel engine a. has no ignition system. b. does not utilize pistons. c. has no connecting rods. d. does not have a crankshaft.

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.