Styrofoam is made with 98% air and 2% styrene, which is from petroleum oil. It is useful in society for its light weight, insulation abilities and ease at molding for packaging.
Which term best described Styrofoam?
raw material
composite
conductor
natural
composite
Bryan is designing part of a computer. He needs to create a component that will carry an electric current from one part of the computer to another. Which material would be the best choice for this component?
rubber
copper
glass
plastic
copper
What term is the measurement of power being put into an electrical circuit?
conductivity
electron
voltage
current
current
An architect is designing an office building in an area that can experience earthquakes. Which component would it be most important to strengthen in order to allow the building to withstand the additional forces exerted during an earthquake?
the windows
the doors
the foundation
the electrical system
the foundation
In a battery when does chemical energy become usable energy?
when there is chemical reaction between metals and nonmetals
when the current becomes zero
when electrons stop moving between atoms
when a reaction produces the same products
when the chemical reaction between the electrodes produces a flow of electrons (electric current) through an external circuit.
Which one?
1,2,3,4