The answer is high pressure. In a nuclear reaction process, high temperature and high pressure is required for turning hydrogen nuclei into a helium nucleus. It is impossible for it to happen simultaneously because it requires tremendous amounts of energy. Extreme conditions are required for the atoms to overcome electrostatic repulsion.
        
                    
             
        
        
        
Answer:
√1.45 = 1.2041594578792
Explanation:
Step 1:
 Divide the number (1.45) by 2 to get the first guess for the square root .
Step 2:
 Divide 1.45 by the previous result. d = 1.45/0.725 = 2.
 Average this value (d) with that of step 1: (2 + 0.725)/2 = 1.3625 
 previous value = 0.725 - 1.3625 = 0.6375.
 0.6375 > 0.001
Now we repeat the step
Step 3:
 Divide 1.45 by the previous result. d = 1.45/1.3625 = 1.0642201835.
 Average this value (d) with that of step 2: (1.0642201835 + 1.3625)/2 = 1.2133600918 
 Error = new guess - previous value = 1.3625 - 1.2133600918 = 0.1491399082.
 0.1491399082 > 0.001. 
Step 4:
 Divide 1.45 by the previous result. d = 1.45/1.2133600918 = 1.1950285903.
 Average this value (d) with that of step 3: (1.1950285903 + 1.2133600918)/2 = 1.2041943411 (new guess).
 Error = new guess - previous value = 1.2133600918 - 1.2041943411 = 0.0091657507.
 0.0091657507 > 0.001.
Step 5:
 Divide 1.45 by the previous result. d = 1.45/1.2041943411 = 1.2041245757.
 Average this value (d) with that of step 4: (1.2041245757 + 1.2041943411)/2 = 1.2041594584 
 - previous value = 1.2041943411 - 1.2041594584 = 0.0000348827.
 0.0000348827 <= 0.001. accuracy, we stop the iterations and use 1.2041594584 as the square root.