It is not a real bone it is just a slang for either finding something to be humorous or a tingling sensation after bumping your body on something.
Generally, sounds above 85 dB are harmful, so the sound of 145 dB may damage hearing.
2nd choice (cause injury), because health and safety is the more serious cause than the rest.
The answer is infrastructure.
Answer:
C=2πr
Explanation: The circumference = π x the diameter of the circle (Pi multiplied by the diameter of the circle). Simply divide the circumference by π and you will have the length of the diameter. The diameter is just the radius times two, so divide the diameter by two and you will have the radius of the circle!
