If the mass of an object is 6 kg and its momentum is 72 kgm/s, what is its velocity?
a. 18 m/s
b. 12 m/s
c. 9 m/s
d. 72 m/s

The brightest star in the night sky in the northern hemisphere is sirius. its distance from earth is estimated to be 8.7 light years. a light year is the distance light travels in one year. light travels at a speed of 3.00 × 108 m/s. calculate the distance from earth to sirius in miles. (1 mi = 5280 ft) g