Question

A share drum has an energy output of 12.3 watts a piano has an entry output of 0.44 watts and a trombone has an energy output of 6.4 watts and they are all playing at once what is the combined output of the instruments what is the average energy output of the instruments

Answer 1

a)
`\Delta E_(tot) = 19.14\,W`, b)
`\Delta E_(mean) = 6.38\,W`

Explanation:

a) The combined energy output is the sum of each energy output from instruments:

`\Delta E_(tot) = E_(1) + E_(2) + E_(3)`

`\Delta E_(tot) = 12.3\,W + 0.44\,W + 6.4\,W`

`\Delta E_(tot) = 19.14\,W`

b) The average energy output of the instruments is:

`\Delta E_(mean) = (E_(1)+E_(2)+E_(3))/(3)`

`\Delta E_(mean) = (19.14\,W)/(3)`

`\Delta E_(mean) = 6.38\,W`