Answer:
Explanation:
Given
Pipe is lowered to the water 
Negative Pressure is applied to raise the water 
Pressure is given by 

where 




(b)8.82 atm is much lower than the vapor pressure of water
(c)The fact of applying a negative pressure of 8.74 below the vapor pressure of water
 
        
             
        
        
        
Answer:
Acceleration of the second particle at that moment is given as

Explanation:
As we know that both cars are connected by same spring
So on this system of two cars there is no external force
So we will have

now we have



now we have

so we have

 
        
             
        
        
        
For a given wave in a given medium, if the frequency doubles, 
the wavelength becomes 50% shorter. 
That is, it becomes half as long as it was originally.
        
             
        
        
        
Answer:
0.94 m/s^2 downwards 
Explanation:
m = 70 kg, m g = 70 x 9.8 = 686 N
R = 620 N 
Let the acceleration be a, as the apparent weight decreases so the elevator is moving downwards with an acceleration a. 
mg - R = ma
686 - 620 = 70 x a
a = 0.94 m/s^2