Answer: The right Answer is Velocity has both speed and direction.
Explanation:
i took the test
Answer:
a) 
b) 
Explanation:
From the question we are told that:
Wire Length 
Resistance 
Force 
Power 
a)
Generally the equation for Power is mathematically given by

Therefore



b)
Generally the equation for Magnetic Field is mathematically given by



The third one sliding friction
Explanation:
Are there any options??
I would have to say metal of course but without options I can't assume anything
C. increased stirring i think