Answer:
50km/h
Explanation:
Average velocity = change in distance (or distance travelled) divided by/ the change in time (or time taken.)
The change in distance has been given as 100km.
The change in time is 3pm-1pm = 2 hours.
Therefore the average velocity was 100/2 = 50km/h (to the east).
Hope this helped!
 
        
             
        
        
        
Maria throws two stones from the top edge of a building at a speed of 20 m/s, The time is mathematically given as 
t=4.5 sec.
<h3>How much later is it before the second stone hits?</h3>
Generally, the equation for speed  is mathematically given as
V = u+at
Therefore
0 = 22-9.8xt.
t = 22 /9.8 sec
t = 2.24489.
The same time will be taken from max^m height to point O
The extra time is taken 
t=4.49 sec.
t=4.5 sec.
Read more about Time
brainly.com/question/4931057
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The other name is displacement vessels 
(not sure tho)
        
                    
             
        
        
        
Answer:cells?
Explanation:
Not to sure what you mean
 
        
             
        
        
        
Answer:A compact fluorescent lamp
Explanation: