The 48 and 47 are different atomic masses, this is caused by having a different number of neutrons.
        
                    
             
        
        
        
Answer:
alcohol thermometer is preferred for a very cold region. Alcohol thermometer is preferred for a very cold region because its freezing point of alcohol is - 117°C. So, it can measure the temperature of the very cold region.
 
        
             
        
        
        
Newtons. Force is mass times acceleration. Mass is measured in kilograms (kg) and acceleration is measured in meters per second squared (m/s^2.) These units (kg and m/s^2) multiplied together like in the equation force equals mass times acceleration (F=ma) gives a product with Newtons as the unit. 
        
             
        
        
        
Answer:
5.08*10^{-13}N
Explanation:
With this information we can calculate the velocity of the proton by taking into account the kinetic energy of the proton:

The magnitude of the magnetic force will be:

hope this helps!