Answer:
baking the cake batter
Explanation:
Baking the cake batter will indicate that chemical change has occurred here. What is a chemical change? 
- A chemical change is one in which a new kind of matter is formed. 
- It is usually accompanied by energy either evolution or absorption of energy in form of heat or light or both. 
- The process is irreversible. 
- When the batter bakes, a new substance different from the cake mix is obtainable. 
- We cannot get back the ingredient from this baked cake. It is impossible. 
- This is good indicator of chemical change. 
 
        
             
        
        
        
 Wave C
because it is the closest or each wave is closer than the others
 
        
                    
             
        
        
        
Answer:
The speed of the plank relative to the ice is:

Explanation:
Here we can use momentum conservation. Do not forget it is relative to the ice.
 (1)
 (1)
Where:
- m(g) is the mass of the girl
- m(p) is the mass of the plank
- v(g) is the speed of the girl
- v(p) is the speed of the plank 
Now, as we have relative velocities, we have:
 (2)
 (2)
v(g/b) is the speed of the girl relative to the plank
Solving the system of equations (1) and (2)



I hope it helps you!       
 
        
             
        
        
        
False, because of the nicotine in it. Nicotine is addictive