Answer:
497.00977 N
3742514.97005
Explanation:
 = Density of water = 1000 kg/m³
 = Density of water = 1000 kg/m³
C = Drag coefficient = 0.09
v = Velocity of dolphin = 7.5 m/s
r = Radius of bottlenose dolphin = 0.5/2 = 0.25 m
A = Area
Drag force

The drag force on the dolphin's nose is 497.00977 N
at 20°C
 = Dynamic viscosity =
 = Dynamic viscosity = 
Reynold's Number

The Reynolds number is 3742514.97005
 
        
             
        
        
        
Answer:
angular velocity(ω) is the rate change of angular displacement.
ω=θ/t and it SI unit is rad/s
Explanation:
this is very similar with the definition of linear velocity (rate of change of displacement). it specifies the angular speed of an object and the axis about which the object is rotating.
 
        
             
        
        
        
Answer:
a
The  radial acceleration is  
b 
The horizontal Tension is  
The vertical Tension is  
Explanation:
 The diagram illustrating this is shown on the first uploaded 
From the question we are told that 
    The length of the string is  
      The mass of the bob is  
      The angle made  by the string is  
The centripetal force acting on the bob is mathematically represented as 
          
Now From the diagram we see that this force is equivalent to 
       where T is the tension on the rope  and v is the linear velocity
 where T is the tension on the rope  and v is the linear velocity  
      So 
           
Now the downward normal force acting on the bob is  mathematically represented as 
           
So
        
=>    
=>   
The centripetal acceleration which the same as the radial acceleration  of the bob is mathematically represented as
       
=>  
substituting values 
      
      
The horizontal component is mathematically represented as 
      
substituting value 
     
 
     
The vertical component of  tension is  
     
 substituting value 
      
        
 
The vector representation of the T in term is of the tension on the horizontal and the tension on the vertical is  
          
        
 substituting value  
       ![T  = [(0.3294) i  + (3.3712)j ] \  N](https://tex.z-dn.net/?f=T%20%20%3D%20%5B%280.3294%29%20i%20%20%2B%20%283.3712%29j%20%5D%20%5C%20%20N)
           
 
        
             
        
        
        
<span>The answer is 45 miles per hour or even less. Most crashes occur at a speed of 45 miles per hour or even less, and most of these accidents occur close to our homes. These crashes may also be caused by different factors, such as being drunk or sudden occurrences that are not controllable, which is why it is best to precede with caution when driving at crowded areas.</span>
        
             
        
        
        
Hi there!
We can begin by deriving the equation for how long the ball takes to reach the bottom of the cliff. 

There is NO initial vertical velocity, so:

Rearrange to solve for time:

Plug in the given height and acceleration due to gravity (g ≈ 9.8 m/s²)

Now, use the following for finding the HORIZONTAL distance using its horizontal velocity:
