Answer:
thats a lot, which one u want me to do?
Explanation:
 
        
             
        
        
        
 The correct answer is letter D. Anemometer. It is a device that is used to measure wind speed. It is a very common weather station instrument and is available to use and to make. Anemos, from the greek word that means wind.
        
                    
             
        
        
        
Answer:
437500Joules
Explanation:
Kinetic energy=1/2mvsquare
1/2 x 1400 x 25 x25
kinetic energy= 437500Joules
 
        
             
        
        
        
Answer:
v=115 m/s
or
v=414 km/h
Explanation:
Given data

To find
Terminal velocity (in meters per second and kilometers per hour)
Solution
At terminal speed the weight equal the drag force

For speed in km/h(kilometers per hour)
To convert m/s to km/h you need to multiply the speed value by 3.6
 
 
 
        
             
        
        
        
Answer:

Explanation:
When a standing wave is formed with six loops means the normal mode of the wave is n=6, the frequency of the normal mode is given by the expression:

Where  is the length of the string and
 is the length of the string and  the velocity of propagation. Use this expression to find the value of
 the velocity of propagation. Use this expression to find the value of  .
.

The velocity of propagation is given by the expression:

Where  is the desirable variable of the problem, the linear mass density, and
 is the desirable variable of the problem, the linear mass density, and  is the tension of the cord. The tension is equal to the weight of the mass hanging from the cord:
 is the tension of the cord. The tension is equal to the weight of the mass hanging from the cord:

With the value of the tension and the velocity you can find the mass density:

