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A student builds an electric circuit to play a radio. The circuit contains a radio, wires and a hand-held electric generator. When he turns the handle on the generator the radio begins to play. Which best explains how the radio gets electric energy
Paint the device white to reflect radiant heat.
When it is up at its highest point
convection
They need to find a way to reduce the friction
The generator transforms kinetic energy into electric energy.
It changes from potential to kinetic to sound and thermal
The heat energy would transfer from the person's hand to the glass
Pour grease on it to reduce the friction.
Students were asked to design a way to improve the efficiency of a simple machine. What problem would they need to solve?
Paint the device white to reflect radiant heat.
When it is up at its highest point
convection
They need to find a way to reduce the friction
The generator transforms kinetic energy into electric energy.
It changes from potential to kinetic to sound and thermal
The heat energy would transfer from the person's hand to the glass
Pour grease on it to reduce the friction.
A student was designing a device to keep ice from melting. Which of the following would work best to minimize heat transfer by radiation?
Paint the device white to reflect radiant heat.
When it is up at its highest point
convection
They need to find a way to reduce the friction
The generator transforms kinetic energy into electric energy.
It changes from potential to kinetic to sound and thermal
The heat energy would transfer from the person's hand to the glass
Pour grease on it to reduce the friction.
Joey wishes to improve the efficiency of his inclined plane. Which of the changes below will most likely improve the efficiency of his simple machine?
Paint the device white to reflect radiant heat.
When it is up at its highest point
convection
They need to find a way to reduce the friction
The generator transforms kinetic energy into electric energy.
It changes from potential to kinetic to sound and thermal
The heat energy would transfer from the person's hand to the glass
Pour grease on it to reduce the friction.
A builder made sure that there were no spaces that air could get in around the windows in a new house he was building. He did this so it would be easier to heat and cool the house. What type of heat transfer was he trying to minimize by doing this?
Paint the device white to reflect radiant heat.
When it is up at its highest point
convection
They need to find a way to reduce the friction
The generator transforms kinetic energy into electric energy.
It changes from potential to kinetic to sound and thermal
The heat energy would transfer from the person's hand to the glass
Pour grease on it to reduce the friction.
What causes a person's hand to become cold when they pick up a glass of ice water?
Paint the device white to reflect radiant heat.
When it is up at its highest point
convection
They need to find a way to reduce the friction
The generator transforms kinetic energy into electric energy.
It changes from potential to kinetic to sound and thermal
The heat energy would transfer from the person's hand to the glass
Pour grease on it to reduce the friction.
Jill wants to model a energy transformation. She holds a book above the floor to give it potential energy. She then drops the book. What energy transformation occurs after she drops the book?
Paint the device white to reflect radiant heat.
When it is up at its highest point
convection
They need to find a way to reduce the friction
The generator transforms kinetic energy into electric energy.
It changes from potential to kinetic to sound and thermal
The heat energy would transfer from the person's hand to the glass
Pour grease on it to reduce the friction.
When would a roller coaster car have the MOST potential energy?
Paint the device white to reflect radiant heat.
When it is up at its highest point
convection
They need to find a way to reduce the friction
The generator transforms kinetic energy into electric energy.
It changes from potential to kinetic to sound and thermal
The heat energy would transfer from the person's hand to the glass
Pour grease on it to reduce the friction.
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