'Displacement' is the distance and direction between the starting point and 
ending point, regardless of the path followed to get there.
A particle that's executing simple harmonic motion is always in the same place 
where it was one time period ago, and where it will be later after another time 
period has passed.  
So its displacement during exactly one time period is exactly zero.
        
             
        
        
        
Answer:
3.12 x 10^-5 m
Explanation:
Length of steel column, L = 4 m 
diameter, d = 0.2 m 
radius = half of diameter = 0.1 m 
Young's modulus, Y = 2 x 10^11 N/m^2 
Mass of truck, m = 5000 kg 
Force, F = mass of truck x acceleration due to gravity 
F = 5000 x 9.8 = 49000 N
Area of crossection of cable,
A =  
Let ΔL be the shrink in length of cable, then by the formula of Young's modulus



ΔL = 3.12 x 10^-5 m 
Thus, the shrink in the length of cable is 3.12 x 10^-5 m. 
 
        
             
        
        
        
The rate of altitude increase is equivalent to the vertical component of the pilot's velocity. Let the first pilot's velocity be A and the second's be B.
Ay = Asin(∅)
Ay = 400sin(30)
Ay = 200 mph
By = Bsin(∅) 
By = 300sin(40)
By = 192.8 mph
200 - 192.8 = 7.2 mph
The first pilot gains altitude faster by 7.2 mph than the second pilot.
        
             
        
        
        
Answer:
2.16 inch
Explanation:
area under water = 66 km²
= 66 x ( 3280.84 x 12 )² inch²
= 1.023 x 10¹¹ sq inch 
volume of rain = 9.57 x 10⁸  gallon = 9.57 x 10⁸ x 231 inch³
= 2.21 x 10¹¹ inch³
If depth of rainfall be t 
volume of rain = surface area x depth 
= 1.023 x 10¹¹ x t 
So , 
1.023 x 10¹¹ x t  = 2.21 x 10¹¹
t = 2.16 inch 
 
        
             
        
        
        
Gamma waves have a short wavelength. The closer the wavelength  ( ) the higher frequency the wave is
) the higher frequency the wave is