Answer:
SI=
How far d does the person travel during the collision if the car was initially moving forward at 4.50 km/h ?
d=
When any boat displaces a weight of water equal to its own weight, it floats. This is called the "principle of flotation": A floating object displaces a weight of fluid equal to its own weight.
Answer:
Light does not need a medium to travel travel through, but since waves must have a medium to vibrate, sound is not created where no air is present.
Explanation:
Answer: The sound intensity was reduced by -14.77 dB.
Explanation:
The level of the intensity of the sound with respect to the reference value is called Sound Intensity level.

I = Intensity of the sound
= Reference sound intensity
According to question, sound-reflecting windows that reduce the sound intensity level by 30.0 db .
Let the intensity of the sound be
and reduced intensity be I.



The sound intensity was reduced by -14.77 dB.