Two masses traveling at the same speed v₀ collide head on. nothing is known about the collision other than that it is not completely inelastic. true / false.

false

Explanation:

Elastic collision: the collision is said to be elastic if the kinetic energy is conserved during the collision.

If the kinetic energy is not conserved, then the collision is not elastic.

So, here no information is given so we cant say about the type of collision.

So, it is False.

co2reflects heat radiation back to earth buning coal and oil emits co2 globe warms

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees.