A 8.7 cm tall Aragorn action figure is placed 10.8 cm in front of a double convex lens. If the image of Aragorn is located 5.8 cm from the lens, what magnification is produced from this arrangement (positive values only)?

answer is c

explanation:

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )