Answer:
DETAILS IN THE QUESTION INSUFFICIENT TO ANSWER
Explanation:
Assuming the liquid to be water ,
the density  of water is :
 of water is :  
 
Buoyant force exerted by a liquid on an object with  of it's volume immersed is :
 of it's volume immersed is :

where ,
 is the buoyant force is the buoyant force
 is the density of the liquid is the density of the liquid
 is the acceleration due to gravity is the acceleration due to gravity
Thus at equilibrium:

from these , we get the density of brass to be 
which is not possible 
 
        
             
        
        
        
Answer:
Removing some of the books reduced the mass of the box, and less force was needed to push it across the floor.
 
        
             
        
        
        
Answer:
The power for circular shaft is 7.315 hp and tubular shaft is 6.667 hp
Explanation:
<u>Polar moment of Inertia</u>

       = 0.14374 in 4
<u>Maximum sustainable torque on the solid circular shaft</u>

          =
          = 3658.836 lb.in
          =  lb.ft
 lb.ft
          = 304.9 lb.ft
<u>Maximum sustainable torque on the tubular shaft</u>

           = 
           = 3334.8 lb.in 
           =  lb.ft
 lb.ft
           = 277.9 lb.ft
<u>Maximum sustainable power in the solid circular shaft</u>

           = 
           = 4023.061 lb. ft/s
           =  hp
 hp
           = 7.315 hp
<u>Maximum sustainable power in the tubular shaft</u>

             = 
             = 3666.804 lb.ft /s 
             =  hp
hp
             = 6.667 hp
 
        
             
        
        
        
Answer:
45.88297 m
Violet
Explanation:
x = Gap between holes = 5.9 mm
 = Wavelength = 527 nm
 = Wavelength = 527 nm
D = Diameter of eye = 5 mm
L= Distance of observer from holes
From Rayleigh criteria we have the relation

A person could be 45.88297 m from the tile and still resolve the holes
Resolving them better means increasing the distance between the observer and the holes. It can be seen here that the distance is inversely proportional to the wavelength. Violet has a lower wavelength than red so, violet light would resolve the holes better.