<span>more lines = a lot of electrons returning back to ground state from same level</span>
        
             
        
        
        
Answer:
The specific gravity of the unkown liquid is 15.
Explanation:
Gauge pressure, at the bottom of the tank in this case, can be calculated from

where  and
 and  are the height of the column of oil and the unkown liquid, respectively. Writing for
 are the height of the column of oil and the unkown liquid, respectively. Writing for  , we have
, we have

Relative to water, the unknow liquid specific weight is 15 times bigger, therefore this is its specific gravity as well.
 
        
             
        
        
        
Answer:
True
Explanation:
Magnetic field lines outside of a permanent magnet always run from the north magnetic pole to the south magnetic pole. Therefore, the magnetic field lines of the earth run from the southern geographic hemisphere towards the northern geographic hemisphere.
 
        
             
        
        
        
Answer:
The value of tangential acceleration  40
  40 
The value of radial acceleration 
Explanation:
Angular acceleration = 50 
Radius of the disk = 0.8 m
Angular velocity = 10 
We know that tangential acceleration is given by the formula  
 
Where r =  radius of the disk
 = angular acceleration
 = angular acceleration 
⇒  0.8 × 50
 0.8 × 50 
⇒  40
 40 
This is the value of tangential acceleration.
Radial acceleration is given by 

Where V = velocity of the disk = r 
⇒ V = 0.8 × 10
⇒ V = 8 
Radial acceleration 


This is the value of radial acceleration.