Impulse is the change in momentum. So you just have to subtract 300 -280
The answer would be 20kgm/s
I believe the answer is two convex lenses. A compound microscope has two systems of lenses for greater magnification, the ocular, or eyepiece lens that one looks into and the objective lens, or the lens closest to the object. Both the ocular lens and the objective lens are convex lens.
Answer:
It's comparative
compare means to find the similarities and differences of two or more objects.
Explanation: