Time standards are now based on atomic clocks. A promising second standard is ba

Question

Time standards are now based on atomic clocks. A promising second standard is based on pulsars, which are rotating neutron stars (highly compact stars consisting only of neutrons). Some rotate at a rate that is highly stable, sending out a radio beacon that sweeps briefly across Earth once with each rotation, like a lighthouse beacon. Suppose a pulsar rotates once every 1.446 806 448 872 75 3 ms, where the trailing 3 indicates the uncertainty in the last decimal place (it does not mean 3 ms).

(a) How many times does the pulsar rotate in 30.0 days?
___
(b) How much time does the pulsar take to rotate 4.0 106 times? (Give your answer to at least 4 decimal places.)
___ s
(c) What is the associated uncertainty of this time?
+/- _____ s

Explanation / Answer

The same idea of your question http://www.physics.umt.edu/phys325/Phys215/Physics_215N_files/ch1HW_all.pdf

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