Ablender takes in 180 j of electrical energy. of the 180 j, 90 j are transformed into kinetic energy, 60 j are transformed into thermal energy, and the rest is transformed into sound. what is the sound energy generated by the blender?
30 j
90 j
150 j
330 j

For this case, the first thing we are going to do is define variables.

We have then:

x: kinetic energy

y: thermal energy

z: sound energy

We know that the sum of the three energies is equal to the electric energy.

We have then:

From here, we clear the energy of the sound:

Substituting values we have:

The sound energy generated by the blender is:

30 J

Answer : 30 J

Explanation :

It is given that,

A blender takes in 180 J of electrical energy.

Energy transformed into kinetic energy is 90 J.

Energy transformed into thermal energy is 60 J.

The electrical energy is transformed into kinetic energy (KE), thermal energy (TE) and sound energy (SE).

So,

Hence, the sound energy generated by the blender is 30 J.

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