Answer:
Explanation:
For simple pendulum the formula is 

Where T is time period , l is length and g is acceleration due to gravity .

n is frequency 
Putting the values 


l = 1.584 m 
 
        
             
        
        
        
Answer:
 2.5 x 10^{5} J
Explanation:
weight = 5,000 N
coefficient of friction = 0.05
distance = 1000 m
how much work is done by the dogs pulling the sledge
work done = force x coefficient of friction x distance
work done = 5000 x 0.05 x 1000 = 2.5 x 10^{5} J
 
        
             
        
        
        
The egg is transferred from the ovary to the uterus through muscle contractions called uterine contractions by using special hair like structures called cilia.