Density=mass/volume therefore volume=mass/density; 55g/11.4g/cm^3= 4.82cm^3
60 RPM equals one hertz (i.e., one revolution per second, or a period of one second). The SI unit for period is the second.
Answer:
your question in not complete.
you need to the high too.
Its actually C. I did the question on USA test prep and it said the correct answer was C.
Answer:
Moment of inertia of Earth about its own axis is given as

Explanation:
Since Earth is considered as solid sphere
So we will have

so we will have

so we have
