Answer:
Explanation:
sound level scale is logarithmic which is given by the following formula
L = 10 log I / I₀ where I₀ = 10⁻¹² W / m² s
80 = 10 log I / 10⁻¹²
8 = log I / 10⁻¹²
I / 10⁻¹² = 10⁸
I = 10⁻⁴ W / m² .s
for three person the intensity becomes three times ie
3 x 10⁻⁴
L = 10 log 3 x 10⁻⁴ / 10⁻¹²
= 10 log 3 x 10⁸
= 10 ( 8 + log 3 )
= 10 ( 8 + .477 )
= 84.77 dB .
The main determining factor in defining boundaries between layers of earth's atmosphere would be temperature changes in these layers. Temperature is one essential property that varies in the atmosphere. Based from this variation, the atmosphere is divided into four major layers and further to three smaller layers - troposphere, tropopause, the stratosphere, stratopause, the mesosphere, mesopause, and the thermosphere.The troposphere is the layer that is nearest to the surface of the Earth. It is the part where humans, plants and animals survive. Also, it is the warmest layer of the atmosphere. And as we go higher the atmosphere, the temperature would drop making it much cooler.
All describe an objects motion except : mass
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<span>the gravational potential energy of anything on the ground is zero. When calculating potential energy you take height in meters and multiply it by the mass of the object in kilograms and the acceleration of gravity to get a new unit called Joules.
Any object at ground level has a potential energy of zero newtons becuase anything multiplied by zero is zero. An object with mass of 54 kg, 4 meters above the ground has a gravitatinal potential energy of 2116.8 Joules.</span>
