1. A student depends on her electric alarm clock every morning to get up in time for school. What energy transformation happens for the student's alarm clock to wake her up in the morning?
The energy transformation that happens in this scenario is electrical energy being converted into mechanical energy. The electrical energy from the power source is used to power the mechanism of the alarm clock, which then triggers the mechanical movement (such as the ringing of the alarm) that wakes up the student.
a: chemical energy is converted to kinetic energy
b: sound energy is converted to electrical energy
c: electrical energy is converted to sound energy
d: electrical energy is converted to thermal energy
c: electrical energy is converted to sound energy
The alarm clock uses electrical energy to produce sound energy in the form of noise to wake up the student.
What is the energy transformation that occurs when a smoke alarm goes off?
Sound energy to light energy
Electrical energy to sound energy
Electrical energy to potential energy
Potential energy to electrical energy
b: Electrical energy to sound energy
In a smoke alarm, electrical energy powers the mechanism that produces an audible alarm sound when smoke is detected, making it an example of electrical energy being converted into sound energy.
The total amount of energy in the universe never changes, but the availability of each different type of energy to do work can change tremendously. What best explains this change in available energy?
a: Energy can only be created through nuclear reactions.
b: Energy can only be transferred as heat.
c: Energy is always converted with 100 percent efficiency.
d: Energy is regularly changing from one form into another.
d: Energy is regularly changing from one form into another.
This statement reflects the principle of conservation of energy, which states that energy can neither be created nor destroyed, but can change from one form to another. This leads to changes in the availability of different types of energy to do work.
Sam loves to play the guitar. What energy transformations occur when he strums the strings of the guitar and you hear the music his guitar makes?
a: Kinetic energy to potential energy
b: Electrical energy to kinetic energy
c: Kinetic energy to sound energy
d: Sound energy to kinetic energy
c: Kinetic energy to sound energy
When Sam strums the strings of the guitar, he is imparting kinetic energy to the strings, causing them to vibrate. The vibrating strings then transmit this energy as sound waves, leading to the production of music that you hear. This is an example of kinetic energy being transformed into sound energy.