Answer:
The oxidation number of a monatomic (composed of one atom) ion is the same as the charge of the ion. For example, the oxidation numbers of K+, Se2−, and Au3+ are +1, -2, and +3, respectively. The oxidation number of oxygen in most compounds is −2.
Explanation:
 
        
             
        
        
        
Answer:
The  value is    
Explanation:
From the question we are told that 
    The initial  speed of the roller coaster is 
     The  length of the hill is  
     The  acceleration of the  roller coaster is 
Generally the acceleration is mathematically represented as 
       
Here   is the initial time which is equal to zero
 is the initial time which is equal to zero 
           is the final velocity which is mathematically represented as
 is the final velocity which is mathematically represented as 
           
 So  
      
      
       
      
Solving this using quadratic formula we obtain 
     
      
Generally  time cannot be negative so 
        
Generally the  final velocity is mathematically represented as 
          
          
         
 
        
             
        
        
        
Answer: When volume is constant, pressure is directly proportional to temperature. When temperature is constant, pressure is inversely proportional to volume. When pressure is constant, volume is directly proportional to temperature.
Explanation:
 
        
             
        
        
        
the answer would be b. it`s half as great
 
        
             
        
        
        
Answer:
Explanation:
pressure decreases with increasing altitude. The pressure at any level in the atmosphere may be interpreted as the total weight of the air above a unit area at any elevation. At higher elevations, there are fewer air molecules above a given surface than a similar surface at lower levels.