If you wrap some of the wire around the nail in one direction and some of the wire in the other direction, the magnetic fields from the different sections fight each other and cancel out, reducing the strength of your magnet.
True, the law of inertia effects both moving and non-moving objects.
Answer:
tan 249 = 2.61
tan 249 = tan (249 - 180) = tan 69 = 2.61
In practice, something that follows a very predictable pattern can be used as a time standard. This include things like radioactive decay, planetary orbit, and the speed of light, among others.
