Answer:
a
 Generally from third equation of motion we have that 
 ![v^2 =  u^2 + 2a[s_i - s_f]](https://tex.z-dn.net/?f=v%5E2%20%3D%20%20u%5E2%20%2B%202a%5Bs_i%20-%20s_f%5D%20)
Here v is the final speed of the car 
 u is the initial speed of the car which is zero 
  is the initial position of the car which is certain height H
 is the initial position of the car which is certain height H 
  is the final position of the car which is zero meters (i.e the ground)
 is the final position of the car which is zero meters (i.e the ground) 
 a is the acceleration due to gravity which is g 
 So
 ![v^2 = 0 + 2g[H - 0]](https://tex.z-dn.net/?f=v%5E2%20%3D%200%20%2B%202g%5BH%20-%200%5D%20) 
 
=> 
b
  
 
Explanation:
Generally from third equation of motion we have that 
 ![v^2 =  u^2 + 2a[s_i - s_f]](https://tex.z-dn.net/?f=v%5E2%20%3D%20%20u%5E2%20%2B%202a%5Bs_i%20-%20s_f%5D%20)
Here v is the final speed of the car 
 u is the initial speed of the car which is zero 
  is the initial position of the car which is certain height H
 is the initial position of the car which is certain height H 
  is the final position of the car which is zero meters (i.e the ground)
 is the final position of the car which is zero meters (i.e the ground) 
 a is the acceleration due to gravity which is g 
 So
 ![v^2 = 0 + 2g[H - 0]](https://tex.z-dn.net/?f=v%5E2%20%3D%200%20%2B%202g%5BH%20-%200%5D%20) 
 
=> 
 
When  we have that
 we have that 
 
=> 
=>  
 
 
        
             
        
        
        
The convection going on with the magma in the asthenosphere
        
                    
             
        
        
        
Weight = (mass) x (gravity)
On Earth ...
Weight = (1 kg) x (9.8 m/s^2)
Weight = 9.8 Newtons
 
        
             
        
        
        
The frequency, f, of a wave is the number of waves passing a point in a certain time. We normally use a time of one second, so this gives frequency the unit hertz (Hz), since one hertz is equal to one wave per second.
        
             
        
        
        
Oxygen is a gas a room temperature.