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: Marie is rolling cards down a hill. She wants to know which cart will get to the bottom of the hill slower, an empty cart, or a full cart? The cart that will finish first will have a mass that is 
 Answer: lower

A: An object has greater momentum if it has greater mass, greater velocity, or both.
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Q: Question: Compared to a solution of lye with water, which is strongly basic, would vinegar, which is acidic, have a pH value 
 Answer: closer to 0

A: The more acidic a solution is, the closer its pH value will be to 0
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Q: Question: If we find an electromagnetic wave with very short wavelengths, it will likely have _____ energy. 
 Answer: much

A:
Electromagnetic waves with shorter wavelengths have higher frequencies and more energy.
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