In this graph, a man left home a 12 noon to go for a cycle ride. the man stopped for another rest at 2 pm. He rested for one hour. Then he cycled home at a steady speed. It took him 2 hours. What was his average speed on the way back home(NOT for the entire journey).

Your answer is c. explanation: plasma  is the fourth state of matter, derived from the gaseous state of matter.  plasma  can contain free  electrons  and/or  ions. while  plasma is never neutral, it can either be positively or negatively charged.  gases, however, are electrically neutral.

Answermuch larger;

A) soundwaves travel through a vacuum

Answerin a area that has very high humidity