Studies of the relationship of the sun to our galaxy— the milky way—have revealed that the sun is located near the outer edge of the galactic disc, about 30 000 ly (1 ly 5 9.46 3 1015 m) from the center. the sun has an orbital speed of approximately 250 km/s around the galactic center. (a) what is the period of the sun’s galactic motion? (b) what is the order of magnitude of the mass of the milky way galaxy? (c) suppose the galaxy is made mostly of stars of which the sun is typical. what is the order of magnitude of the number of stars in the milky way?

i think the answer would be b

the right answer is 0.3 meters per second

its a circle not a square that's simple silly.

explanation:

chemical energy --> gravitational potential energy --> kinetic energy --> elastic potential energy --> gravitational potential energy

explanation:

when emma starts the hike, the chemical energy stored in her body is used to climb up the mountain, and so she gains gravitational potential energy (because at the end, she will be at a higher height h above the ground). then she goes bungee jumping: as she falls, this gravitational potential energy is converted into kinetic energy (because her speed increases as she falls down), until the point when the rope stretches, and she stops moving. at that moment, all the kinetic energy is converted into elastic potential energy due to the stretching of the rope. then, this energy is released because the rope returns to its natural length, and emma gains a small increase in altitude , so she gains some gravitational potential energy.