What is a second's pendulum?

What is a seconds pendulum? What is its approximate length?

What is a seconds pendulum? Determine its length in the CGS system [g=980cm*s^(-2)] .

What is a seconds pendulum?

What is second's pendulum ? Find the length of second's pendulum for g = 9.8 m//s^(2) ? Also write expressions for the time period if the second's pendulum is an a carriage which is accelerating (a) upwards (b) downwards (c ) horizontally. Also, fin the value of time period of it if is made to oscillate a freely falling lift.

State the laws of a simple pendulum. What is seconds pendulum? Calculate its length.