In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

[Q]: Question: If Mona is building a machine to help her vacuum her floor and she decreases the amount of force the engine inside the vacuum, what happens to the vacuum ability to make work easier?
Answer: decreases
[A]: Machines make work easier by increasing the amount of force that is applied, increasing the distance over which the force is applied, or changing the direction in which the force is applied.

[Q]: Question: If Mona works in a defense lab and her company develops worse missiles, what happens to the advancement of rocket technologies?
Answer: decreases
[A]: The development of better missiles fostered better rocket technologies.

[Q]: Question: John was watching the sound waves in his electronic monitor when he noticed something. The speed of the sound waves was faster when the temperature was
Answer: higher
[A]:
For a given medium, sound waves travel more slowly at lower temperatures.