Consider the earth following its nearly circular orbit (dashed curve) about the sun.(Figure 2) The earth has mass mearth=5.98×1024kg and the sun has mass msun=1.99×1030kg. They are separated, center to center, by r=93millionmiles=150millionkm.
July 11, 2013
Consider a train that rounds a curve with a radius of 570m at a speed of 160 km/h (approximately 100 mi/h)Calculate the friction force needed on a train passenger of mass 75kg if the track is not banked and the train does not tilt.
July 6, 2013
A satellite used in a cellular telephone network has a mass of 2010kg and is in a circular orbit at a height of 770km above the surface of the earthWhat is the gravitational force Fgrav on the satellite? Take the gravitational constant to be G = 6.67×10−11N⋅...
April 27, 2010
How did the Minoans and Mycenaens shape early greek civilization? Minoan Society: http://traumwerk.stanford.edu:3455/Archaeopaedia/142 This site gives the history of early Greek society and discusses the contributions of both the Minoan and Mycenaean eras. http://www.cameron....
October 28, 2006