I think its between b or c
        
                    
             
        
        
        
Answer:
Distance will decrease and work will decrease:
F = m a      Newton's Second Law
a = F / m       decreasing force will decrease acceleration
S = 1/2 a t^2 = 1/2 (F / m) t^2     distance traveled will decrease as force        decreases 
W = F * S       work will decrease as both force and distance decrease
 
        
             
        
        
        
Answer:
Probably all but (a)
The Tyndall Effect is caused by dispersion of the incident light by the individual molecules in the liquid.
Salt water and a foggy night will cause dispersion of the incident light.
A soda drink may also cause this dispersion, but and not sure.
 
        
             
        
        
        
The answer would be 9,940 K is the temperature of Sirius B.