Wildlife researcher starts from a and then reaches b, he turns towards north 40 degree to move towards c.
Total displacement is ac
Total horizontal displacement = 4+4 cos40 =7.06 km
Total vertical displacement = 4 sin40 =2.57 km
Total displacement 
= 7.51 km
60 days, tell me if I'm correct please.
The correct answer as the first one above !
C. Magnetism
It is a physical property, not a chemical property.
Answer:
A works to find magnitude. The leading negative sign gives us the positive magnitude after the correct velocity is found without it.
