Answer:
<em>Hydrogen bond is the attractive force between the hydrogen attached electronegative atom </em>
Explanation:
 
        
             
        
        
        
Answer:
Explanation:
Given that:
mass of stone (M) = 0.100 kg
mass of bullet (m) = 2.50 g = 2.5  ×10 ⁻³ kg
initial velocity of stone ( ) = 0 m/s
) = 0 m/s
Initial velocity of bullet ( ) = (500 m/s)i
) = (500 m/s)i
Speed of the bullet after collision ( ) = (300 m/s) j
) = (300 m/s) j
Suppose we represent  to be the velocity of the stone after the truck, then:
 to be the velocity of the stone after the truck, then:
From linear momentum, the law of conservation can be applied which is expressed as:





∴
The magnitude now is: 


Using the tangent of an angle to determine the direction of the velocity after the struck;
Let θ represent the direction:


 
        
             
        
        
        
Answer:
is; is not
Explanation:
The four-firm concentration ratio for newstands is 17 and for electric lamp makers it is 89. The HHI for newstands is 105 and for electric lamp makers it is 2 comma 850. The newstand market is an example of monopolistic competition. The electric lamp market is not an example of monopolistic competition
 
        
             
        
        
        
Gravity is a non contact force , jump from a little high place (don't do that :P) , you wont just get stuck in the air you will fall down , this is gravity you dont need any contact 
        
             
        
        
        
Answer:
There is no mechanical advantage
Explanation:
The mechanical advantage is possible only when the force needed to lift a load is lesser than the weight of the load.
For example, is we have a mechanical advantage of 2, the force needed to lift will be 1/2 of the weight of the load, and if we have a mechanical advantage of 4, the force needed will be 1/4 of the weight of the load.
In the attached image there are clear examples of mechanical advantage with pulleys.