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 energy

The total electrical energy is 180 J.

Step2: Calculate sum of known - energy forms

The sum of kinetic and thermal energy is 90 J + 60 J = 150 J.

Step3: Calculate sound energy

Using the conservation of energy, sound energy = Total energy−(Kinetic energy + Thermal energy). So, sound energy = 180 J−150 J = 30 J.

Answer:

A. 30 J