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Physics

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Clara Lebsack

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2y ago
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Cards in this guide (15)
Which type of modification of radio waves sends signals the farthest

amplitude modulation

What kind of basic scientific knowledge is vital to the production of medicines

chemistry

Which technological device is used by most scientists in the world

computer

What kind of basic knowledge goes into the technology of automobiles

All the answers are correct.

Which material lines the tubes of fluorescent lights and glows when exposed to UV light

Phosphor.

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

it can be projected

Which term is used to describe objects that are visible because of reflected light

illuminated

Thats the right answer for a plus.

What are the biggest machines in the world used for

Learning more about subatomic particles

Why do you use digital signals

to decide true or false

Which of the following is true of sound waves

sound waves require a medium to transfer energy

FOR A+ USERS THE ANSWER IS Sound waves travel in all directions
sound waves require a medium to transfer energy

-- They are longitudinal waves and material medium is required for their propagation.

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.

True or false radio waves are electromagnetic waves

true

Which type of technology predates most of our knowledge of basic science

electricity

What of these statements is true of technology

It can create new problems

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