How much time does it take a skater to increase her speed uniformly, from 3.0 meters per second to 7.0 meters
per second, over a distance of 10 meters?
a. 1.0 s
b. 4.0 s
c 6.0 s
d. 2.0 s

Stephanie lives in california, and her cousin thomas lives in france. which coordinate system would be most useful if the two wanted to observe the same meteor shower and discuss their observations over online chat as they're making them? a. horizontal b. equatorial c. azimuth-altitude d. celestial or azimuth-altitude