The person in charge of information management is the database administrator.
<h3>What is a database?</h3>
The term database refers to the arranging of the data that concerns clients in relevant entry point such as computers and file cabinets. This is the way by which companies are bale to keep track of their customers.
The person that is most helpful in the management of the  tens of thousands of customer addresses in three different computer systems and written on paper in filing cabinets is the database administrator.
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Answer: 1. The movie one is virtual and the bathroom mirror is real
2. The image is distorted in a way
3. Behind the spoon
Explanation:
 
        
             
        
        
        
The characteristics of standing waves allows to find the result for the speed of the wave is: 
- The speed wave is:  v = 10 m / s
The wave is a way of transmitting energy without mass displacement, , in the attachment we can see a diagram of the standing wave. 
Each cycle corresponds to half a wavelength,  they indicate that the frequency is 2.50 Hz and there are three cycles, so the wavelength is:
       L =  
 
       λ = 2L/n 
       λ = 2 6 /3
        λ = 4 m 
Wave speed is related to wavelength and frequency
          v = λ f
          v = 4 2.5 
          v = 10 m / s
 
In conclusion, using the characteristics of standing waves we can find the result for the speed of the wave is:
- The wave speed is:   v = 10 m / s
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The chemical formular for water is H2O.
The H aspect of the formula stands for hydrogen gas and the subscript 2 which is attached to the H symbol signifies that two atoms of hydrogen are joined together, that is two atom of hydrogen are present.
The chemical formula of water indicates that, two atom of hydrogen react with one atom of oxygen to form one molecule of water.
In chemical formulae, subscripts are normally used to indicate the number of atoms that are present in a molecule.
        
             
        
        
        
Answer:
B) Friction
Explanation:
Friction is a force that acts when an object is sliding along a surface. Microscopically, this force is due to the fact that the two surfaces are not perfectly smooth, but they have "imperfections" that cause a force that opposes the motion of the object.
For an object sliding on a flat surface, the force of friction has magnitude:

where
 is the coefficient of kinetic friction
 is the coefficient of kinetic friction
m is the mass of the object
g is the acceleration of gravity
The direction of the force of friction is always opposite to the direction of motion of the object.
In reality, friction also acts if the object is at rest and it is pushed by a force; in this case, we talk about static friction, and its magnitude is

where  is called coefficient of static friction, and it is generally larger than the coefficient of kinetic friction.
 is called coefficient of static friction, and it is generally larger than the coefficient of kinetic friction.