The period of the pendulum is the reciprocal of the frequency:

The period of the pendulum is given by

where L is the length of the pendulum, and g the acceleration of gravity. By re-arranging the formula and using the value of T we found before, we can  calculate the length of the pendulum L:
 
 
        
        
        
Answer:
n = 1.76
Explanation:
According to the rule of ( n1 sin theta1 = n2 sin theta2 )
we know both angles so we insert them to the law and apply n1 = 1 
so 1/2 = n2 sin 62 and we get the final answer
 
        
             
        
        
        
We have no idea.  There are probably many things involved ... the planet's mass, 
the availability of small bodies in the neighborhood that can be captured, etc.
        
             
        
        
        
Answer:
All electromagnetic radiation, regardless of its wavelength, travels at what is called the "speed of light". In a vacuum, it is measured as 299,792,458 meters per second. 3.0 x 108 meters per second.