Phy101 14995 Essay2 3Apap

According to the law of conservation of angular momentum if there is no unbalanced external torque acting on a rotating system, then the angular momentum of that system remains constant. This means that with no net change in external torque, the product of rotational inertia and rotational velocity at one time will be the same as at any other time. If the polar ice caps where to melt and the depth of the world’s oceans increased by 30m the mass of the polar ice caps would no longer be at the earth’s axis (poles) but more evenly distributed throughout globe. When the mass moves away from the axis of the earth (or any spinning object) the conservation of angular momentum causes the earths rotating to slow down thus days would be longer. How long it would be increased can be determined by using the equation for calculating angular momentum ? = (4/5?)?2 where r is the radius of the sphere(the radius of the earth is currently 6,367,500m but would be increased to 6367530m if the polar ice caps melting caused sea levels to rise 30m), T equals the length of a day which is approximately 86400 seconds. Using these numbers the new length of a day would be calculated by multiplying 63675302 (the estimated new radius of earth after the melting of the polar ice caps) by 86400 (approximate length of current earth day in seconds) and dividing this number by 63675002 (the current radius of the earth) which equals 86400.8 an increase in the length of the day by 0.8 seconds.

References
Bergshoeff, E.A. & Meijerink, R. (2014). Melting Icecaps. Center for Theoretical Physics. University of Groningen. Retrieved from http://www.rug400.nl/rug400_2/rug_definitief.dev/sites/default/files/Melting%20Icecaps.pdf

1. A can of diet soda floats in water, whereas a can of regular soda sinks. Explain this phenomenon in terms of density and in terms of weight versus buoyant force. Support your answer.
If the can of diet soda floats it must be less dense then can of regular soda. This is