Answer:
zero times greater
Explanation:
Coffee's pH level is 5
Pure water's pH level is 7
Your performance on the pacer test is used to measure cardiovascular components of health-related fitness

➡ 150hrs.

➡ Time = distance × speed
➡ Time = 15*10
➡ Time = 150hrs ans.
When a crest-trough meet the interference produced will be destructive in nature hence they both will cancel out and the amplitude produced will be equal to zero hence the loudness will reduce to zero.