यदि एक मानव हृदय प्रति मिनट 80 बार धड़कता है, तो इसका आवर्तकाल (time period) _______ होगा।

An AC signal has a frequency of 60 Hz. What will be the time period for that signal?

If the frequency of a vibrating object is 50 Hz, what is its time period?

What is the increasing order of time periods of simple pendulums, all under the same acceleration due to gravity g, which have the following bob masses and lengths respectively? (K) 0.2 kg, 0.4 m (L) 0.2 kg, 0.9 m (M) 0.1 kg, 0.6 m (N) 0.3 kg, 0.2 m (O) 0.3 kg, 0.8 m