Answer:
2.5 cm
Explanation:
Number of spins in 12 seconds = 18 
Number of spins in 1 second = 18 / 12 = 1.5
Number of spins in one second is called frequency. 
f = 1.5 rps
ac = 2.2 m/s^2 
Let r be the radius of coin
Centripetal acceleration, ac = r x w^2 
2.2 = r x ( 2 x 3.14 x 1.5) ^2
2.2 = r x 88.7364
r = 0.025 m = 2.5 cm
 
        
                    
             
        
        
        
Answer:
Liquid has a defined volume but undefined shape
Explanation:
Explanation:
Solid has specific shape and volume
Liquid has specific volume but no specific shape
Gases have no specific volume and no specific shape
So correct answer is liquid.
 
        
                    
             
        
        
        
F = ma so u can plug in the given numbers and solve:
F = (2)(3)
        
             
        
        
        
Answer:
<h2>
44 m/s</h2>
Explanation:
In this problem we are expected to calculate the velocity of Georges movements.
Given data
Total distance covered by  George= 850+250= 1100 meters
Time taken  by  George to cover the total distance= 25 seconds
We know that velocity is, v= distance/ time
Therefore substituting our data into the expression for velocity we have
 v= 1100/ 25= 44 m/s
Hence the velocity in m/s is 44
 
        
             
        
        
        
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