Which is the value of a vector quantity? A 200 V
B 100 kg/m3
C 20m/s, east
D 50J/(kg°C)

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this

i think its c if i'm wrong

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray