Question

a blender 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

Explanation:

Step1: Identify total input energy

The total electrical energy input is 180 J.

Step2: Calculate sum of known - output energies

Kinetic energy is 90 J and thermal energy is 60 J. The sum is $90 + 60=150$ J.

Step3: Calculate sound energy

Using the law of conservation of energy, sound energy = Total input energy - Sum of other output energies. So, sound energy is $180 - 150 = 30$ J.

Answer:

A. 30 J