Answer:
The horn will sound like it is at a higher pitch.
Explanation:
Th sound waves are closer together at the front of the car because the car is traveling forward.
Answer:
False
Explanation:
A virus (which is a pathogen) has a lot of antigens on its surface, so they can't be used interchangeably.
Answer:
The concentration of a substance is the quantity of solute present in a given quantity of solution.