People have learnt to make shelters in a way so that they don't get affected by natural disasters that are common in their area. For example, people make houses of complete brick so they are stronger and can withstand a powerful storm
        
             
        
        
        
Answer:
After the ejection of an alpha particle, the remaining nucleus has a mass number that is four less and an atomic number that is two less, so alpha decay is a type of nuclear fission.
 
        
             
        
        
        
Zinc Oxide is the IUPAC name for ZnO
        
             
        
        
        
<h3>
Answer:</h3>
812 kPa
<h3>
Explanation:</h3>
- According to Boyle's law pressure and volume of a fixed mass are inversely proportional at constant absolute temperature.
 
- Mathematically, 

 
At varying pressure and volume;
P1V1=P2V2
In this case;
Initial volume, V1 = 2.0 L 
Initial pressure, P1 = 101.5 kPa
Final volume, V1 = 0.25 L 
We are required to determine the new pressure;

Replacing the known variables with the values;

            = 812 kPa
Thus, the pressure of air inside the balloon after squeezing is 812 kPa