In order to calculate the weight of an object sitting on the earth's surface, one would use the following formula: f = gme m where g = 6.674 í— 10-11 m3 is the universal gravitational constant, g r2 kgs2 me = 5.97 í— 1024 kg is the mass of the earth (also a constant), r is the radius of the earth at the object's location (measured in m), and m = the mass of the object (measured in kg). calculate the weight of a penny (to the correct number of significant figures) using this formula if you measure the penny's mass to be 2.5 g and the radius of the earth at the penny's location to be 6.383 í— 103 km. use unit algebra to express the unit for weight as some combination of the metric system's standard units for mass, length, and time.