Answer:
xccccccccccccccccZd sdv ds
Explanation:
Change of pitch that occurs<span> due to a moving sound source</span>
Answer:
increased by 9 times
Explanation:
As the period of a simple pendulum is defined as the following formula

where L is the length of the pendulum and g is the constant gravitational acceleration. Since L is under a square root, if you want to triple the period of vibration, L must be increased by 9 times so that 