Answer:
D air
Explanation:
it is not found on the periodic table 
brainliest plsssssssssssssssss
 
        
             
        
        
        
Answer:
Waves carry energy from one place to another. Because waves carry energy, some waves are used for communication, eg radio and television waves and mobile telephone signals. There are many types of waves including sound waves, water waves and all the parts of the electromagnetic spectrum.
Explanation:
 
        
                    
             
        
        
        
Answer:
 h> 2R
Explanation:
For this exercise let's use the conservation of energy relations
starting point. Before releasing the ball
        Em₀ = U = m g h
Final point. In the highest part of the loop
        Em_f = K + U = ½ m v² + ½ I w² + m g (2R)
where R is the radius of the curl, we are considering the ball as a point body.
       I = m R²
       v = w R
we substitute
        Em_f = ½ m v² + ½ m R² (v/R) ² + 2 m g R
        em_f = m v² + 2 m g R
 
 Energy is conserved
        Emo = Em_f
        mgh = m v² + 2m g R
        h = v² / g + 2R
  
The lowest velocity that the ball can have at the top of the loop is v> 0
       h> 2R
 
        
             
        
        
        
The question in choice-C is the correct answer to your question.
(Is this confusing ?)
        
                    
             
        
        
        
Substract two consecutive terms of the sequence to see if there is a common difference:

As we can see, there is a common difference of -6.
Then, if a number of the sequence is given, the next one can be found by adding -6 (which is the same as subtracting 6).
Notice that the first term of the sequence is 3.
Then, the rule for the sequence is to start with 3 and add -6 repeatedly.
Therefore, the correct choice is option A) Start with 3 and add -6 repeatedly.