Answer: negative acceleration 
Explanation:
Acceleration is speeding up, the ball is slowing down making it negative acceleration 
 
        
                    
             
        
        
        
Answer:
Particles in a: gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.
i hope this helps your answer
 
        
                    
             
        
        
        
Answer:
8.40 m/s
Explanation:
Slope of the plot is 0.119
Slope of a plot is given by the change in y direction divided by the change in x direction
Here, the y axis represents inverse wavelength and the x axis represents frequency.
f = Frequency (Hz, assumed)
v = Phase velocity (m/s, assumed)
λ = Wavelength (m, assumed)
So, slope

Now,


The speed of sound travelling in the tube is 8.40 m/s
 
        
             
        
        
        
Answer:
Explanation:
At constant pressure , work done by gas = P x ΔV where P is pressure and ΔV is change in volume 
ΔV = 9.2 - 5.6 = 3.6 L 
3.6 L = 3.6 x 10⁻³ m³
ΔV = 3.6 x 10⁻³ m³
P = 3.7 x 10³ Pa 
So work done 
= 3.7 x 10³ x 3.6 x 10⁻³ J 
= 13.32 J .
( c ) is the answer , because work is done by the gas so it will be positive. 
 
        
                    
             
        
        
        
This is true. let me know if im wrong.