In an elastic collision, an object with momentum 25 kg⋅m/s collides with another that has a momentum 35 kg⋅m/s. The first object’s momentum changes to 10 kg⋅m/s. What is the final momentum of the second object?

15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?

Which accurately compares concave and convex lenses?

How to tell if a molecule is polar or nonpolar with electronegativity