We want to know what is the power supplied by the power cell if the current I=0.5 A and the voltage V=0.43 V. The equation for power P is P= I*V, so:
P=I*V=0.5*0.43=0.215 W
So the correct answer is that the power cell is supplying the motor with P=0.215 W of power. 
        
             
        
        
        
Each  ion contains three extra protons. Hence, the extra charge on each
 ion contains three extra protons. Hence, the extra charge on each   =
 =  C
 C
Total charge = 0.035 pC
Total charge (Q) =  C
 C
Let the number of  ions be n.
 ions be n.
According to question:



n = 72917
Hence, the total number of ions needed to be transferred is 72917
 
        
             
        
        
        
Answer:
What does that even mean?
Explanation:
 
        
                    
             
        
        
        
Answer:
Because the Earth has it's own gravity that keeps us put, and we also have the moon.
Explanation:
 
        
             
        
        
        
Answer:
a. the core will spin faster.
Explanation:
By law of conservation of angular momentum 
(mvR)i= (mvR)f
m= mass of star
v= speed of star
R= radius of star
i= initial 
f= final
since, size(R) of the star is reduced by factor of 10,000 and mass remains the same, the velocity must increase by the same factor to keep the angular momentum conserved. 
Hence, a. the core will spin faster.