Attractive forces between molecules of the same type are called cohesive forces. ... Attractive forces between molecules of different types are called adhesive forces. Such forces cause liquid drops to cling to window panes, for example.
        
             
        
        
        
Answer:
It may not be at the sea level
Explanation:
The reason here is water only boils at sea level. This means that if you move water to a different height, say top of a mountain, the boiling temperature of water would change. This is due to the pressure drop at high place. The drop of pressure would make it harder to transform water liquid to gas, thus requiring more temperature.
 
        
                    
             
        
        
        
Third
every action has an opposite and equal reaction
        
                    
             
        
        
        
Answer:
Explanation:
a )
We shall apply the concept of impulse . 
Impulse = force x time = change in momentum 
= 5 x 4 = 2 ( V - 3 )  , where V is final velocity of the object 
20 = 2V - 6 
V = 13 m /s 
b )
Impulse applied = - 7 x 4 = - 28 kg m/s ( negative as direction of force is opposite motion )
If v be the final velocity 
2 x 3 - 28 = 2 v  ( initial momentum - change in momentum = final momentum ) 
- 22 = 2v 
v = - 11 m /s 
object will move with 11 m /s in opposite direction .