<h3><u>Answer;</u></h3>
Period = 1/17 seconds
<h3><u>Explanation;</u></h3>
- Wavelength is related to period by the expression:
<em>speed = wavelength / period
</em>
- If we are given the speed, then we can easily calculate the period at the wavelength of 20 m.
<em>Given the speed of sound wave as 340 m/s </em>
<em>Period = Wavelength/ speed</em>
<em>            = 20 m/340 m/s</em>
<em>            </em><u><em>= 1/17 seconds</em></u>
 
        
        
        
Answer:

Explanation:
From the second law of Newton movement laws, we have:
 , and we know that a is the acceleration, which definition is:
, and we know that a is the acceleration, which definition is:
 , so:
, so:

The next step is separate variables and integrate (the limits are at this way because at t=0 the block was at rest (v=0):

 (This is the indefinite integral), the definite one is:
 (This is the indefinite integral), the definite one is:

 
        
             
        
        
        
As per Bernuolli's Theorem total energy per unit mass is given as

now from above equation




now by above equation


Part B)
Now energy per unit weight



 
        
             
        
        
        
Answer:

Explanation:
We could use the following suvat equation:

where
s is the vertical displacement of the coin
v is its final velocity, when it hits the water
t is the time
g is the acceleration of gravity
Taking upward as positive direction, in this problem we have:
s = -1.2 m

And the coin reaches the water when
t = 1.3 s
Substituting these data, we can find v:

where the negative sign means the direction is downward.
 
        
             
        
        
        
 Answer:
Pascal is a derived unit because <u>it</u><u> </u><u>cannot</u><u> </u><u>be</u><u> </u><u>expressed</u><u> </u><u>in</u><u> </u><u>any</u><u> </u><u>physics</u><u> </u><u>terms</u><u>,</u><u> </u><u>but</u><u> </u><u>it</u><u> </u><u>is</u><u> </u><u>an</u><u> </u><u>expression</u><u> </u><u>of</u><u> </u><u>fundamental</u><u> </u><u>quantities</u><u>.</u>
Explanation:
