Asound system is being set up in a gazebo in a park. it needs to produce music so that everyone can hear it. how much power would the speakers need to produce in order for the intensity at 5 meters away to be 1 x 10^-8 w/m^2? (assume the shape of the propagation of the sound wave is a hemisphere)

1.87 x 10^-7 w
1.57 x 10^-6 w
1.14 x 10^-6 w
2.46 x 10^-7 w

Power of the speakers = 1.57

Explanation:

There are speakers setup in a park and we have to find the power it would require to have intensity of sound to be at a distance of 5 meter.

In one dimension the intensity is constant as the wave travels. In two or three dimensions, however, the intensity decreases as you get further from the source.

Intensity is inversely proportional to the square of the distance from the point of sound production.

Here area = 2

area = 157

Power =

your answer is, orbit around the nucleus

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.