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?
A. a garden hose with moving water
B. music playing on your phone
C. a windmill moving in the wind
D. a lamp giving off light
D. a lamp giving off light
Kyra and Violet are camping with their family. They are roasting marshmallows over a campfire. What types of energy are released by the camp fire?
A. mechanical energy and magnetic energy
B. heat energy and light energy
C. nuclear energy and electrical energy
D. chemical energy and sound energy
B. heat energy and light energy
When energy is conserved or transferred, some energy becomes unavailable to do useful work. What happened to the unavailable energy?
A. It is conducted
B. it is completely destroyed
C. it is given off as heat
D. it is given off as microwaves
C. it is given off as heat
An electric fan is plugged into an outlet and the circuit completed, making the fan blades spin. Which of the following correctly describes this situation?
A. Electrical energy is transformed into mechanical energy.
B. Mechanical energy is transformed into electrical energy.
C. Mechanical energy is destroyed, and electrical energy is created.
D. Electrical energy is destroyed, and mechanical energy is created.
A. Electrical energy is transformed into mechanical energy.
when a girl is running what is the main type of energy conversion taking place?
When a girl is running, the main type of energy conversion taking place is the conversion of chemical energy stored in her body (from food) into mechanical energy as she moves and performs physical work.
To determine which of the given options is NOT an example of mechanical energy, let's first understand what mechanical energy is. Mechanical energy is the sum of potential energy and kinetic energy in an object.
Now, let's evaluate each option to see if it represents mechanical energy:
A. A garden hose with moving water: This is an example of mechanical energy because water flowing through the hose has both kinetic energy (due to its motion) and potential energy (due to its position).
B. Music playing on your phone: This is NOT an example of mechanical energy. Music playing on your phone is a form of sound energy, which is a different type of energy.
C. A windmill moving in the wind: This is an example of mechanical energy since the wind causes the windmill blades to move, resulting in both kinetic energy and potential energy.
D. A lamp giving off light: This is NOT an example of mechanical energy. A lamp giving off light is a form of light energy, which is also a different type of energy.
Therefore, the correct answer is B. Music playing on your phone, as it does not represent mechanical energy.