Answer:
a planet
Explanation:
a planet is one which exerts these properties and therefore is the answer
 
        
             
        
        
        
Using the principle of floatation.
u = w............(a)
Upthrust of fluid is equal to the weight of the object.
Let the volume of the wood be V.
The upthrust u, is related to the volume submerged in water, and that is 1/5 of it volume, that is (1/5)V = 0.2V
Formula for upthrust, u = vdg
where v = volume of fluid displaced
d = density of fluid
g = acceleration due to gravity
weight, w = mg
where m = mass
g = acceleration due to gravity 
From (a)
                     u = w
                 vdg =  mg      Cancel out g
                   vd  =  m
 
The v  is equal to 0.2V, which is the submerged volume. Notice that the small letter v is volume of fluid displaced, and capital V is the volume of the solid. 
d is density of fluid which is water in this case, 1000 kg/m³
         0.2V * 1000 =  m
           200V =  m
Hence the mass of the object is  200V  kg.
But Density of solid =  Mass of solid / Volume of solid
                                 =    200V / V
                                 =    200 kg/m³
Density of solid = 200 kg/m³      
        
             
        
        
        
93.5 if it’s wrong sorry sis I need my homework done too
        
             
        
        
        
Answer:kinetic energy converted to heat energy 
Explanation:
As the ball rolls down kinetic energy is converted to heat energy 
 
        
                    
             
        
        
        
The mass of a substance is given in atomic mass units and is calculated by adding the average atomic masses of all the atoms in the substance's chemical formula.
<h3>What empirical formula represents the total average atomic mass of every atom?</h3>
The Method The average atomic masses of all the atoms included in a formula's representation are added to get the mass of any molecule, formula unit, or ion. It has no bearing on the number of significant figures because the number of atoms is an exact quantity. One H2O molecule weighs 18.02 amu on average.
<h3>What connection exists between the empirical formula and the molecular formula?</h3>
You can determine the number of atoms of each element in a molecule using its molecular formula. These empirical formulations provide the most basic or reduced elemental ratio of a compound. The empirical formula and the molecular formula of a substance are same if the molecular formula can no longer be decreased.
To know more about atomic mass visit:-
brainly.com/question/17067547
#SPJ4