Mathematics, mostly.
They also did groundbreaking work in the following fields:
Astronomy 
Philosophy 
Geography
Sciences 
Technology
        
             
        
        
        
Answer:Everyone in Britain was given a gas mask in a cardboard box, to protect them from gas bombs, which could be dropped during air raids. Why did people fear that chemical weapons might be used in World War Two? Gas had been used a great deal in the First World War and many soldiers had died or been injured in gas attacks.
Explanation:
 
        
                    
             
        
        
        
Answer:
B) Newton used mathematical equations to describe how the physical world works.
Explanation:
 
        
             
        
        
        
Answer:
because they have their own beliefs.
Explanation:
The U.S. Supreme Court upheld the constitutionality of segregation in Plessy v. Ferguson (1896), so long as " separate but equal " facilities were provided, a requirement that was rarely met in practice
 
        
             
        
        
        
Answer:
1.WHISTLING= Whistling for London taxis was banned in case it should be mistaken for an air raid warning.
2. LOITERING
= People were forbidden to loiter near bridges and tunnels or to light bonfires.
3=CLOCKS GO FORWARD
=British Summer Time was instituted in May 1916 to maximise working hours in the day, particularly in agriculture.