Which of the following statements is true about heat flow?(1 point)
Responses
Heat flows from warmer objects to cooler objects.
Heat flows from warmer objects to cooler objects.
Heat flows from cooler objects to warmer objects.
Heat flows from cooler objects to warmer objects.
Heat flows randomly in all directions.
Heat flows randomly in all directions.
Heat does not flow between objects.
Heat does not flow between objects.
Heat flows from warmer objects to cooler objects.
which of the following statements is true about the relationship between the speed of sound and the density of a medium? (1 point)
sound waves travel faster in denser mediums.
sound waves travel slower in denser mediums.
sound waves do not travel in dense mediums.
The density of a medium does not affect the speed of sound waves.
sound waves travel slower in denser mediums.
which physical properties can be used to differentiate between metals and non-metals?
Malleability
Conductivity
transparency
solubility
Malleability and conductivity can be used to differentiate between metals and non-metals. Transparency and solubility are not useful properties for distinguishing between metals and non-metals.
Within the alarm clock seen here, energy is transformed.It is time to get up!
The alarm clock goes off. What are the energy transformations taking place in your alarm clock?
In an alarm clock, the energy transformations that take place are:
1. Electrical energy to mechanical energy: The electrical energy from the power source is converted into mechanical energy to power the clock's movement, including the rotation of the hour and minute hands.
2. Electrical energy to sound energy: When the alarm goes off, electrical energy is converted into sound energy through the speakers or buzzer, producing the alarm sound.
3. Chemical energy to electrical energy (in some cases): If the alarm clock uses batteries, chemical energy stored in the batteries is converted into electrical energy to power the clock's movement and the alarm sound.
Within the alarm clock seen here, energy is transformed.It is time to get up!
The alarm clock goes off. What are the energy transformations taking place in your alarm clock?
Electrical to magnetic to sound
Electrical to light+sound
Electrical to mechanical + light
Chemical to electrical to mechanical
Sorry i forgot to ask what the answers are from the answers given.
Based on the options given, the correct answer would be:
Electrical to sound: The alarm clock uses electrical energy to produce sound energy, resulting in the alarm sound.
In a lab group you combine vinegar and baking soda and observed the results shown in the picture. Choose ALL of the evidence that supports that a chemical change has occurred. Select all that apply.
A gas is produced
The color changed
Bubbling occurred
The baking soda dissolved
There is a change in the composition of the reactants.