Lashonte was studying mechanical energy in science class. She noticed several possible examples of mechanical energy in her environment. Which of the following is NOT an example of mechanical energy?
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1 point
a garden hose with moving water
music playing on your phone
a windmill moving in the wind
a lamp giving off light
A lamp giving off light is not an example of mechanical energy. Light energy is a different form of energy from mechanical energy.
The example that is NOT an example of mechanical energy is "a lamp giving off light."
To determine which of the given options is NOT an example of mechanical energy, we need to understand what mechanical energy is. Mechanical energy refers to the energy possessed by an object due to its motion or position. It can be of two types: kinetic energy (energy of motion) or potential energy (energy of position).
Let's look at each option to see if it represents mechanical energy:
1. A garden hose with moving water: This is an example of mechanical energy because the water inside the hose is in motion, indicating kinetic energy.
2. Music playing on your phone: Music playing on your phone does not involve any physical motion or position. It is the conversion of electrical signals into sound waves, which falls under the domain of electrical energy rather than mechanical energy. Therefore, this option is NOT an example of mechanical energy.
3. A windmill moving in the wind: This is an example of mechanical energy. The wind provides the external force that causes the windmill to rotate, converting wind energy into mechanical energy.
4. A lamp giving off light: The process of a lamp giving off light involves the conversion of electrical energy into light energy, which is a form of electromagnetic radiation. It does not directly involve mechanical energy.
Therefore, the correct answer is: Music playing on your phone