The period T of a pendulum is given by:

where L is the length of the pendulum while 

 is the gravitational acceleration.
In the pendulum of the problem, one complete vibration takes exactly 0.200 s, this means its period is 

. Using this data, we can solve the previous formula to find L:
 
 
        
        
        
<span>When the difference between two results is larger than the estimates error, the result is</span>
        
             
        
        
        
Answer:
letter C. velocity hope this helps 
 
        
             
        
        
        
By definition we have to:
 The electric current is the flow of electric charge due to the movement (usually of electrons) that a material travels.
 Some properties are:
 1) Electric conduction: The conductive materials have a large amount of free electrons, therefore, the passage of electricity is possible.
 2) The current inside a circuit is directly proportional to the voltage and inversely proportional to the resistance of the circuit. This is what is known as ohm's law:

 3) The current can be continuous or alternate.
 Alternating current is the electric current in which the magnitude and direction vary cyclically.
 The direct current is the flow of electric charges that does not change direction with time.
 
        
                    
             
        
        
        
If you're using the bulb as a source of light, then it's. 14/60 = 23.3% efficient.
If you're using it to heat a bird nest or a hamster cage, then it's. 46/60 = 76.7% efficient !
It just depends on your point of view, and what you consider 'useful' output.