If the earth takes 24hours to rotate about it's axis, calculate the mean angular speed of the earth

Angular speed = (1 rotation / 24 hours) x (360 degrees / rotation)

Angular speed = (1 x 360 / 24) x (rotation - degrees / hours - rotation)

Angular speed = 15 degrees/hour

or

Angular speed = 1 degree / 4 minutes

Angular speed = 15 minutes of angle / minute of time

Angular speed = 1/4 minute of angle / second of time

Angular speed = 15 seconds of angle / second of time

or

Angular speed = π/12 radian / hour  

d eras and periods

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explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."