Placing a metal spoon with a temperature of 20oC into a cup of water with a temperature of 90oC will cause the spoon to
A thermos bottle keeps warm liquids warm and cold liquids cold. A thermos bottle must be made from a good
Heat is transferred through an iron bar during this type of heat transfer.
What do we call materials that are poor conductors of heat?
By which process is heat energy transferred when molecules with a substance collide?
A unit for energy is the
Solar cells (panels) can capture energy from our Sun and transfer this energy for many practical purposes. List in the correct order the energy exchanges shown by the diagram.
Which diagram shows the normal pattern of movement that occurs when density differences transfer energy within beakers of water?
On a hot day, the sun causes the sidewalk to become very warm. How do the particles that make up the sidewalk change as the temperature increases?
Two objects, A and B, are in contact with one another. When they are first placed next to each other A is 50oC and the temperature of B is 100oC. Which diagram best represents the flow of heat. (Arrows represent the direction of heat flow.)
The diagrams below represent a laboratory model used to demonstrate convection. Each model shows a burning candle in a closed box with two open tubes at the top of the box. Which diagram correctly shows the air flow caused by the burning candle?
Which process is indicated by the letter X?
Which process is indicated by the letter Y?
A lamp releases only light and thermal energy. The energy input of the lamp is 120 watts. Of that input, 80 watts is converted to light. How much energy is converted to thermal energy?
At which location in the room will the density of the air be greatest?
At which location in the room will the density of the air be the least?
Which type of energy transfer is indicated by the arrows in the diagram?
What might cause an arrow to not reach a target?
Which diagram shows radiation?
Which situation has the greatest potential energy?
Where does the energy from an arrow come from? (Referring to a bow and arrow).