Physics Middle School

All waves need some materials to travel through.
True
False

Electromagnetic radiation is

Energy that is created only by the Sun
Energy that is created by atoms and electricity
Energy that is electric and magnetic
Energy that is magnetic and solar

EM waves have crests, troughs, and wavelengths.

True
False

Radio waves:

Are the shortest waves in the EM spectrum
Need water to travel through
Are the longest waves in the EM spectrum
Carry the most energy in the EM spectrum

What does frequency mean?

How many waves or cycles exist at one time
How many waves or cycles pass a certain point in one minute
How many waves or cycles pass a certain point in one second
How many waves or cycles pass a certain point in one hour
A cycle measures:
1 point
How long the wavelength is
How much time it takes the wave to travel from its source to Earth
The number of waves passing a certain point in one second
A single wave from one crest or trough to the next

Another word for cycles per second is ___.

Hertz
Frequency
EM radiation
Waves

Which waves have the highest frequencies?

Microwaves
UV
Waves with the highest energy
Waves with the lowest energy

Radio waves are used for ________.

TV broadcasting
Cell phones
Pagers
All of the above

In general, if a wavelength is short, __________.

It tells us nothing about the energy and frequency
The energy and frequency are medium
The energy and frequency are high
The energy and frequency are low

Answers

Answer 1
What’s the question?
Answer 2
EM waves have crests, throughs, and wavelengths.-True

Related Questions

give a ghost story fit for a teen

Answers

Answer: ok so this is a true story when i was little and i always like telling story's so here it is...

Explanation: when i was little i had parents that weren't as good and our house was like scary and it had spiders and i was always scared of them so for Christmas me and my 2 sisters got a doll like a American doll and we got princesses and so my older sister Alexis got Cinderella and my other sister heaven she was the second oldest and she got the little mermaid Ariel and i got belle beauty and the beast and so it was getting late and so me and my sister heaven went to put our dolls away in a box and my sister Alexis wanted to put hers in our room we all share a room and a bed and so she decided to put it on this little princess make up dressing table(i found an image that what it kind of looked like ig) siting down and so everyone was sleeping except my older brother he was the oldest and so he wanted to tell my sister Alexis something and our room door was cracked open and before he went to check on her the doll moved and stand up and when down on the floor and walking in circles and my brother saw it and the doll stopped and the dolls head turned facing him and just drooped and so he ran in his room and stayed up all night till someone else woke up  soo yea he never liked dolls never and now thats it i know it took ling but yea

HELP!!!

on a cold winter night, you sit near a fire place.The heat travels toward you and heats you even though you are not in contact with the flame.

A. Radiation
B. conduction
C. convection

Answers

Answer:

radiation

Explanation:

Explain why an X-linked recessive trait is expressed more commonly in males than in females.

Answers

Answer:

X-linked recessive inheritance

A male with a mutation in a gene on the X chromosome is typically affected with the condition. Because females have two copies of the X chromosome and males have only one X chromosome, X-linked recessive diseases are more common among males than females.

X-linked excessive inheritance

Cause and Effect: How do changes in temperature affect air? Pls hurry I’m being timed

Answers

As the molecules heat and move faster, they are moving apart. So air, like most other substances, expands when heated and contracts when cooled. Because there is more space between the molecules, the air is less dense than the surrounding matter and the hot air floats upward.
When gas molecules are heated, the molecules move more quickly, and the increased velocity causes more collisions. As a result, more force is exerted on each molecule and air pressure increases. Temperature affects air pressure at different altitudes due to a disparity in air density.

Where is the location of an earthquake's epicenter?

Answers

Explanation:

The center of the circle will be the location of your seismograph the epicenter of the earthquake is somewhere on the edge of that circle

In the text box below, explain how the periodic table is organized. Be sure to use the following terms within your description: atomic number, protons, group(s), period(s), energy level(s), valence electron(s). Be sure to highlight each of these terms as you use them.

Answers

Answer:

The periodic table is arranged by atomic weight and valence electrons. These variables allowed Mendeleev to place each element in a certain row( called a period) and column( called a group). The table comprises seven rows and 18 columns.

Explanation:

Hope this helped :) This is just an introduction because there was no specified word limit.

where in the cell can you find the location of inherited traits?

Answers

Answer:

D.N.A

Explanation:

The d.n.a is where all the heriditary information is stored.

D.n.a is the answer

what is this please please please help me out

Answers

It’s the same thing but the 4 is negative

Answer: the answer is -4,3

Explanation: hope this helps :)

Your family just moved into a new house. There are three rooms available for you, your brother and sister, but one is larger than the others and has a bigger closet. Your sister has the most clothes and insists she needs the room. Your brother thinks he should get the room because he’s the oldest. You want the extra space for your drum set. It bothered everyone when you practiced in the dining room. Your parents told you to work it out amongst yourselves.
Conflict Scenario:_____________________________________________
Why?
here are the choices

Competition

Avoidance

Accommodation

Compromise

Collaboration

Answers

Answer:

Competition/collaborate most likely collaboration

Explanation:

Trust me on this this will be the best and least messy way to handle the problem, first try to see if your sister can give away some of her clothes, does your brother really need the room, and can you find a different place to store your drum set if not, competition. Decide a fair competition, something that no one is better at than the other, decide the rules, no cheating, and whatever the out come try to be mature about it, maybe your parents will reward you and your siblings.

HELP!!! ILL GIVE YOU BRAINLIEST
the sun transmits energy to the earth in the form of?

A. radiation
B. conduction
C. convection

Answers

Answer:

radiation

Explanation:

Answer:

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Question

the sun transmits energy to the earth in the form of?

A. radiation

B. conduction

C. convection

EXPLANATION:

C: Convection

Transfer of the Sun's Energy through Earth's Systems

When the Sun's energy moves through space, it reaches Earth's atmosphere and finally the surface. This radiant solar energy warms the atmosphere and becomes heat energy. This heat energy is transferred throughout the planet's systems in three ways: by radiation, conduction, and convection.
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