Most commonly the answer is A, the sun. A nebula is a nursery for stars. The Sun itself was created in a nebula. Also,you do not need college physics to understand this question
        
             
        
        
        
The answer is : B. The compass will spin exactly 360 Degrees
Compass will point out to the earth's magnetic field. If we change the direction of the current , we created an effect which make the compass detect the magnetic field in the exact opposite direction, that is why it will flip exactly 180 degrees
        
                    
             
        
        
        
NH4OH is the answer. Hope this helps you.
        
             
        
        
        
Answer:
A 50 kg ball traveling at 20 m/s would have 4 times more kinetic energy.
A 50 kg ball traveling at 5 m/s would have 4 times less kinetic energy.
A 50 kg person falling at 10 m/s would have the same kinetic energy.
Explanation:
hope this helps:)
 
        
             
        
        
        
Average speed = distance traveled / time 
average speed  = (126.5 m * 3.5 laps) / (4.17 min) 
= 106.2 m/min