Take a small burning candle. ... After few minutes the candle is extinguished. As the supply of air is stopped due to glass jar the burning of candle is also stopped. This experiment proves that air supports burning.
        
             
        
        
        
It must be either speeding up, or slowing down, or turning. There are no other possibilities.
 
        
             
        
        
        
Answer:
An electrical cell is a device used to generate electricity, or to make chemical reactions by applying electricity.
 
        
             
        
        
        
Complete Question 
A football coach walks 18 meters westward, then 12 meters
eastward, then 28 meters westward, and finally 14 meters
eastward.
a 
 From this motion what is the distance covered 
b
 What is the magnitude and direction of the displacement 
Answer:
a
   
b
 Magnitude 
               
 
  Direction  
 West 
Explanation:
From the question we are told that 
 The first distance covered westward is ![d_w_1  =  18 \  m /tex]     The  first distance covered eastward is [tex]d_e1 =  12 \  m /tex]      The second distance covered westward is [tex]d_w_2  =  28 \  m /tex]      The  second distance covered eastward is [tex]d_e2 =  14 \  m /tex]   Generally the distance covered is mathematically represented as       [tex]D =  d_w1 + d_w2 + d_e1 + d_e2](https://tex.z-dn.net/?f=d_w_1%20%20%3D%20%2018%20%5C%20%20m%20%2Ftex%5D%3C%2Fp%3E%3Cp%3E%20%20%20%20%20The%20%20first%20distance%20covered%20eastward%20is%20%5Btex%5Dd_e1%20%3D%20%2012%20%5C%20%20m%20%2Ftex%5D%3C%2Fp%3E%3Cp%3E%20%20%20%20%20%20The%20second%20distance%20covered%20westward%20is%20%5Btex%5Dd_w_2%20%20%3D%20%2028%20%5C%20%20m%20%2Ftex%5D%3C%2Fp%3E%3Cp%3E%20%20%20%20%20%20The%20%20second%20distance%20covered%20eastward%20is%20%5Btex%5Dd_e2%20%3D%20%2014%20%5C%20%20m%20%2Ftex%5D%3C%2Fp%3E%3Cp%3E%20%20%20%3C%2Fp%3E%3Cp%3EGenerally%20the%20distance%20covered%20is%20mathematically%20represented%20as%20%3C%2Fp%3E%3Cp%3E%20%20%20%20%20%20%5Btex%5DD%20%3D%20%20d_w1%20%2B%20d_w2%20%2B%20d_e1%20%2B%20d_e2)
=> 
=> 
For the second question eastward is in the direction of the positive x-axis so it would be positive and westward is in the direction of the negative x-axis so it would be negative
 The magnitude of the displacement is 
 
=>   
 
=>  
 
The direction is west 
 
        
             
        
        
        
<h2>
Answer:2.65 seconds</h2>
Explanation:
Let  be the acceleration.
 be the acceleration.
Let  be the initial velocity.
 be the initial velocity.
Let  be the final velocity.
 be the final velocity.
Let  be the time taken.
 be the time taken.
As we know from the equations of motion,

Given,

