The sun, which is 2.2 × 1020 m from the center of the milky way galaxy, revolves around that center once every 2.5 × 108 years. assuming each star in the galaxy has a mass equal to the sun’s mass of 2.0 × 1030 the stars are distributed uniformly in a sphere about the galactic center, and the sun is at the edge of that sphere, estimate the number of stars in the galaxy. note: the actual number of stars in the milky way is between 1011 and 4 × 1011 .

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b mirrors submit a iisner? e. for which optical devices does d sometimes have a positive value? o a a and b o b. a and c o c. b and d 0 d. b and cb

dec 23, 2016 - a load of bricks weighing 680 n a distance of 10 m across a parking lot. if if the worker pushes the cart with a constant force of 209 n, what work= force x distance = 220 n x 10 m = 2200 n.m = 2200 j i don't know where the person got it from, but the initial part, work= force x distance me.