C the correct but not sure?
Answer: experiment data is the things you do in the experiment and the result is the answer
1. I think a drum would be the easiest instrument to explain. You can vary the pitch and loudness by hitting it with different intensities or at different points or angles.
PS. I'm not talking about a drumset. I'm talking about an ordinary drum.
2. Different types of instruments sound different even though they play the same notes because they use different mechanisms for producing sound.
D, you wanna know why.... cause I looked it up
Answer:
3 hours
Explanation:
180 divided by 60 (mph means miles per hours by the way)
