The alpha particle is emitted at 4235 m/s
Explanation:
We can use the law of conservation of momentum to solve the problem: the total momentum of the original nucleus must be equal to the total momentum after the alpha particle has been emitted. Therefore:
 
  
where:  
 is the mass of the original nucleus
 is the mass of the original nucleus
 is the initial velocity of the nucleus
 is the initial velocity of the nucleus
 is the mass of the alpha particle
 is the mass of the alpha particle
 is the final velocity of the alpha particle
 is the final velocity of the alpha particle
 is the mass of the daughter nucleus
 is the mass of the daughter nucleus
 is the final velocity of the nucleus
 is the final velocity of the nucleus
Solving for  , we  find the final velocity of the alpha particle:
, we  find the final velocity of the alpha particle:

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kinematic equation 
v squared = u squared + 2 a x s
v= sq root (0 + 2 10 x 65)
i thimk
 
        
                    
             
        
        
        
<span>The last option.
Plants absorb carbon dioxide from the atmosphere, water from the soil and other nutrients also from the soil - salts containing nitrogene, potassium, sulphur, etc. They use water and carbon dioxide to produce sugar through photosyntesis.
Decomposition is the reaction that converts any organic compound back into inorganic compounds - water, carbon dioxide and salts containing nitrogene, potassium, sulphur, etc. So it's basically the opposite.
So photosyntesis uses carbon dioxide as a reactive and take it from the atmosphere, whereas decomposition generates carbon dioxide as a product and releases it to the atmosphere.</span>
        
             
        
        
        
Answer:
See below ~
Explanation:
An object will sink in water when its density is greater than that of water, which is 1 g/cm³.
Volume of the box is <u>1331 cm³</u>. (11³)
Maximum mass of sand will be 1331 g. [because 1331/1331 = 1 g/cm³]
- Volume of sand = Mass of sand / Density of sand
- Volume (sand) = 1331/3.5
- Volume (sand) = 380.29 cm³
If the volume of sand is <u>greater than 380.29 cm³</u>, the box will sink in water.