Answer:
Wavelength, 
Explanation:
We have,
Velocity of the object, 
Mass of the object, 
It is required to find the wavelength of the object. The relation between wavelength and velocity of the object is given by :

h is Planck's constant

So, the wavelength of the object is
.
Answer:
So you know the things about outer space like facts that you might not know
im pretty sure its A if i did all my reasearch right.
hope this helps luv. <3