PHYS 151 Midterm: Hawaii PHYS 151 exam151m2-04spr
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1 year = 3. 156 107 s orbital distances rearth-sun = 1. 50 1011 m rearth-moon = 3. 84 108 m radii. For multiple choice questions, circle the one best answer or letter (unless more than one answer is asked for). Mmoon = 7. 35 1022 kg (1 pt. each, unless otherwise stated: in march 2004, there was some excitement in astronomy (and in the general news) about the discovery of a 10th planet, tentatively named sedna. Pluto is the 9th planet from the sun, and is 30% larger than sedna in physical diameter. The above diagram schematically shows their relative orbits about the sun. (note: the diagram above is not exactly to scale. ) ______________: consider two spherical masses, a and b, as shown. The gravitational force acting on mass a is 100 n to the right: the magnitude of the gravitational force on b is, the direction of the gravitational force on b is, (2 pts. )
