Answer: Because multiple sounds will be heard over and over again thereby leading to noise and even confusion
Explanation: The reflection of sound waves from a hard surface is called echo and the multiple occurrence of echo is called reverberation.
During concert, several sound waves are released from the source (speaker). However, if the concert takes place in a gym, reverberation will occur.
A gym is a made up of a large space with little or no sound absorbing surfaces (such as sofas and carpets) thereby giving room for reverberation, that is sound waves will be frequently reflected until the sound wave exhausts it's energy. This will result in noise as the same sound will be heard repeatedly and will further lead to imbalance and confusion.
The work energy Mark spent to move the car is
(force) x (distance)
= (140 Newtons) x (140 meters) = 19,600 Joules .
The car moves with constant speed. That tells us that its
acceleration is zero, so the NET force on the car is also zero.
The friction force must be equal to Mark's pushing force, in
the opposite direction, and friction does as much work on the
car as Mark does . . . 19,600 Joules. The work done by the
friction force shows up as heat.
I couldnt type it out so here's a picture
Answer:
In Principia, Newton formulated the laws of motion and universal gravitation that formed the dominant scientific viewpoint until it was superseded by the theory of relativity.