Cards in this guide (17)
How is energy transferred within the earth's atmosphere and throughout the oceans
What is one example of a lever is it a wedge or a wheelbarrow
A wheelbarrow is an example of a class 2 lever as well as a
wheel and axle. A wedge is an example of an inclined plane.
How can transistors act as amplifiers or switches
by creating two circuit loops
What do fixed pulleys always do
change the direction of force
What characteristic exists in magnets that does not exist in materials that lack magnetism
Which of these is not a type of signal used to send information through electricity
Why are temporary magnets so useful
magnetic feilds are produced only when current is flowing
What determines the characteristics of images seen through a magnifying glass
What vision abnormality occurs when light is focused in front of the retina
nearsightedness or myopia
Which term indicates the imaginary line that extends straight out from the center of a reflective surface
The imaginary line that extends straight out from the center of
a reflective surface is the optical axis.
Which of the following is true of a real image
How has basic knowledge about atomic nuclei been used in technology
Knowledge about atomic nuclei has been used to produce
energy.
What scale is used to rate tornadoes by the amount of damage they cause
The Fujita scale determines the strength of the tornado based on
the severity of the damage it causes. In the U.S. it has been
replaced by the Enhanced Fujita scale.
Why do you use digital signals
What type of device is used to increase or decrease the voltage of an electric current
The device is called a "variac' and it is a type of transformer. It has a variable voltage ouput.
What of these statements is true of technology
It can create new problems
Which of these would you expect to make a good insulator
