Electromagnetic waves are transverse in nature and do not require a medium to travel from one point to another. On the other hand, sound waves are longitudinal waves and require a medium to travel from one point to another. hence sound waves can not travel through vacuum but electromagnetic waves can.
The momentum of an object is equivalent to the product of the object's mass and velocity. Computing the momentum for each ball: A- 15 * 0.7 = 10.5 B- 5.5 * 1.2 = 6.6 C- 5.0 * 2.5 = 12.5 D- 1.5 * 5.0 = 7.5
If the power source is 9.0 volts, the current will
be 0.27 amps. The correct answer between all the
choices given is the third choice or letter C. I am hoping that this answer has
satisfied your query and it will be able to help you, and if you would like,
feel free to ask another question.