Betsy uses an electric alarm clock to wake up for school. What energy transformation happens in the alarm clock to help her wake up?(1 point)
Responses
chemical energy converts to electrical energy
chemical energy converts to electrical energy
electrical energy converts to sound energy
electrical energy converts to sound energy
sound energy converts to kinetic energy
sound energy converts to kinetic energy
electrical energy converts to heat energy
electrical energy converts to heat energy
electrical energy converts to sound energy
An aluminum block has a starting temperature of 300oC. The block is placed into 200 milliliters of water, which has a temperature of 20oC. What heat transfer will occur?(1 point)
Responses
Heat will flow from the block to the water until both have a temperature of 300oC.
Heat will flow from the block to the water until both have a temperature of 300oC.
Heat will flow from the block to the water until both substances have the same temperature as their container.
Heat will flow from the block to the water until both substances have the same temperature as their container.
Heat will flow from the block to the water until both substances have a temperature between 20 degrees Celsius and 300 degrees Celcius.
Heat will flow from the block to the water until both substances have a temperature between 20 degrees Celsius and 300 degrees Celcius.
Heat will flow from the block to the water until both substances have a temperature of 20 degrees Celcius.
Heat will flow from the block to the water until both substances have a temperature between 20 degrees Celsius and 300 degrees Celsius.
Two samples of pure water are mixed with food coloring. One sample is red, and the other is blue. When the two water samples are combined, the red water floats on top of the blue water. Which statement best explains this result? (1 point)
Responses
The red water is warmer and is less dense.
The red water is warmer and is less dense.
The red water is colder and is more dense.
The red water is colder and is more dense.
The blue water is warmer and is more dense.
The blue water is warmer and is more dense.
The blue water is colder and is less dense.
The red water is colder and is more dense.
The correct energy transformation that happens in the electric alarm clock to help Betsy wake up is electrical energy converts to sound energy.
In this case, the correct answer is "electrical energy converts to sound energy." The energy transformation that occurs in Betsy's electric alarm clock is the conversion of electrical energy into sound energy.
To understand why this is the correct answer, let's break it down.
First, Betsy's alarm clock operates using electrical energy, which is provided by plugging it into an electrical outlet or using batteries. The electrical energy is stored in the power source of the alarm clock.
Next, when Betsy sets her desired wake-up time and activates the alarm, the electrical energy is sent through the alarm clock's circuitry. The circuitry contains elements such as resistors, capacitors, transistors, and speakers.
As the electrical energy flows through the circuitry, it reaches the component responsible for generating sound, which is usually a small speaker or a piezoelectric buzzer. Here, the electrical energy is converted into sound energy.
The conversion occurs through the motion of a diaphragm or a piezoelectric crystal in the speaker/buzzer. This motion creates vibrations in the air, producing sound waves that travel to Betsy's ears. The sound waves stimulate the receptors in her ears, ultimately registering as sound and waking her up.
So, in summary, when Betsy's alarm clock rings, the energy transformation happening inside the clock is the conversion of electrical energy into sound energy.