Simple Machines
This is any device that helps people do work by changing the way work is done.
What is a simple machine?
This is a property that leads to electro magnetic interactions between the particles that make up matter.
What is electric charge?
These are used to measure the electric current?
What are amperes?
This is a complete, closed path through which electric charges can flow.
What is an electric circuit?
These are objects that attract iron or objects made of iron.
What are magnets?
If you apply more force with a simple machine, you need to apply that force over a shorter distance. So, this remains the same.
What is the amount of work?
Two particles with like charges will do this.
What is repel each other?
Daily Double!!
1. This is the work required to move a unit of charge between two points.
2. These are the units used to express voltage.
What are an energy source, an electrical conductor, and a load?
There are more of these at the poles of a magnet.
What are field lines?
This is how you calculate mechanical advantage.
What is dividing output force by the input force?
These are three ways an object can become charged.
What are by friction, by contact, and by induction?
These are three things that would affect electrical resistance.
What are composition, thickness, and temperature?
This happens to the loads in a series circuit when you open a switch.
What is the loads turn off?
In magnetic materials, groups of atoms form tiny areas that are called this.
What is a domain?
This is a comparison of a machine's work ouput with the work input.
What is mechanical efficiency?
The loss of static charge that has built up on an object is called this?
What is electric discharge?
The opposition to the flow of electric charge is called this?
What is resistance?
These are electric circuits where the current has more than one path to travel.
What are parallel circuits?
We can see this when we are in Australia and we see charged particles from the sun interact with the Earth's magnetic field.
What is an aurora australis?
The ideal mechanical advantage of an inclined plane that is 5.3 meters long, and 2.75 meters high is this.
What is 1.93 times?
These are used in electrical devices to control the flow of electric charge.
What are semiconductors?
Alternating current switches direction this numer of times every second.
What is 60?
These will burn out when the current going into a device is too high.
What are fuses?
Earth's North Pole is like this.
What is the south pole of a magnet?