Which star makes up orion's knee to your right, or the end of his tunic?
a.
polaris
b.
sirius
c.
betelgeuse
d.
rigel

Sorry i don’t know what to do

Velocity is the speed of an object in a certain direction so you'd need to know speed and direction

Because there is no air in the jar, the vibrations can not travel through the air and create sound.  (that's why there is no sound in space, there is no air)