Heather rolls a marble over sand paper and then over a flat table. Which statement best describes the observations she made?

When the marble is pulled, the friction on the table is greater.
When the marble is pushed, the friction is greater on the sandpaper.
The amount of friction is about the same on both surfaces.
The force of gravity pulling the marble lessens the friction between the surfaces.

Answers

Answer 1

Answer:

b

Explanation:

its b


Related Questions

Which of the following best describes a suspension?

A.
A mixture whose components are evenly distributed throughout.
B.
A mixture whose components will settle out over time.
C.
A mixture whose components will not separate over time but does not form a solution.
D.
A mixture whose components consist of a liquid dispersed in another liquid but does not separate over time.

Answers

Answer:

A mixture whose components are evenly distributed throughout.

The amplitude​ of a wave is related to the energy of a wave. How could you demonstrate this relationship between energy and wave

Answers

Answer:

People holding the slinky supply the energy to make the patterns. To make pattern 1, people have to shake the slinky back and forth at a certain speed. To make pattern 2, the slinky has to be moved back and forth faster (higher frequency). To make pattern 4, the people need to move the slinky back and forth much faster. It is much easier to make pattern 1 than pattern 4 because it takes less energy. This illustrates the relationship between frequency and energy – the higher the frequency, the higher the energy.

Explanation:

please tell if this right!if not please answer with correct answers

Answers

Yes I’m. 80% sure that it’s right

Answer:

Yes, you are correct

Explanation:

Nice job :)

When an object is moving on a surface with a lot of texture, how does this affect the amount of friction created?

The friction is stopped.
Less friction is created.
More friction is created.
The amount of friction is the same.

Answers

Less friction created bc it’s not on some flat
More friction is created

do you think the reflected waves would ever return to the airplane that transmitted them? explain

Answers

no, it is very unlikely for that to happen.

The reflected waves should not return back to the transmitted source if there no hindrances in the moving  trajectories. If there is any hindrance or objections in front of the reflected wave there may occur some directional change and does not return to the airplane.

What is reflection?

Reflection is phenomenon by which an incident wave on an object return backs in the straight direction. Reflection make an object shiny as we see from a mirror.

When light passes through a transparent or translucent material it penetrates through it and will refract or scatter from the object. This will happen when the frequency of the incident light does not matches with the frequency of  the incident light.

If the a some waves are transmitted from an airplane and they are reflected in a straight direction, it will not revert back to the airplane because the reflected light  will moves in a straight direction back from airplane.

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Compare and contrast surface waves with transverse waves and with longitudinal waves.

Answers

Answer:

Explanation:

In longitudinal and transverse waves, all the particles in the entire bulk of the medium move in a parallel and a perpendicular direction (respectively) relative to the direction of energy transport. In a surface wave, it is only the particles at the surface of the medium that undergo the circular motion.

Surface waves are a combination of transverse and longitudinal waves that move along the surface of a medium, while transverse waves involve vibrations perpendicular to the direction of wave propagation, and longitudinal waves involve vibrations parallel to the direction of wave propagation.

What are surface, transverse and longitudinal waves?

Surface waves are a type of wave that travels along the surface of a medium. They are characterized by having both a transverse and longitudinal component, meaning that the particles in the medium oscillate both horizontally and vertically as the wave travels. Examples of surface waves include ocean waves, seismic waves, and electromagnetic waves.

Transverse waves are a type of wave that involves vibrations perpendicular to the direction of wave propagation. In a transverse wave, the particles in the medium oscillate in a direction that is perpendicular to the direction the wave is moving. Examples of transverse waves include electromagnetic waves such as light and radio waves, and mechanical waves such as ripples on the surface of water.

Longitudinal waves are a type of wave that involves vibrations parallel to the direction of wave propagation. In a longitudinal wave, the particles in the medium oscillate in a direction that is parallel to the direction the wave is moving. Examples of longitudinal waves include sound waves, seismic waves, and longitudinal electromagnetic waves.

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Please help me I will give you the brain thing and extra points. part 3

Answers

it’s is b because b and b match up

6 Carbon atoms

In the 1st half, there are only 6 Carbon and it is the same on the other side, meaning it is a balenced reaction :)

Hypothesize!​ What type of substance do you think Coffee is? Why?

Answers

https://brainly.com/question/4911981

Answer:

Liquid???? I'm confused on what you are asking it has caffine?

Explanation:

fsdafdsfa

Please help me I will give you the brain thing and extra points. part 2

Answers

The answer is A let me know if you need an in depth.

Answer:

C

Explained:

There's one nitrogen ball and we have two oxygen which is why there's a two there.

Which best completes the analogy?
Thyroid : Neck :: Pancreas : ___________________
A. Brain B. Stomach
C. Kidneys D. Chest

Answers

The answer is ether stomach or kidney
I think stomach. I looked it up and it said digestive system which is behind your stomach. Hope this helped. Please give Brainly

What is the relationship with Wave Medium

Answers

Answer:

medium: The material or empty space through which signals, waves or forces pass. direction of propagation: The axis along which the wave travels. wave: A moving disturbance in the energy level of a field.

1. Express the wave speed of each wave described below in meters per second.
A wave travels through a 2 meter rope in 1 second.

Answers

Answer:

In this instance, the sound wave travels 340 meters in 1 second, so the speed of the wave is 340 m/s. Remember, when there is a reflection, the wave doubles its distance. In other words, the distance traveled by the sound wave in 1 second is equivalent to the 170 meters down to the canyon wall plus the 170 meters back from the canyon wall.

Explanation:

Among electromagnetic waves, UV rays are most dangerous because exposure to these radiation cause serious problems in living organism. Therefore, in below given ways, speed of each wave can be expressed.

What is electromagnetic wave?

Electromagnetic wave is a wave which contain two component one is electric component and other is magnetic component. The electric and magnetic component are perpendicular to each other. There are so many wave that comes under electromagnetic wave like infrared wave , radio wave.

There is a relation between energy of wave. frequency of wave, and wavelength of wave

Mathematically,

E=hc/λ

where,

E = energy of electromagnetic wave

h is planks constant having value 6.67×10⁻³⁴js

c is speed of light that is 3×10⁸m/s

λ is the wavelength of electromagnetic wave

The sound wave moves 340 meters in one second, hence its speed is 340 m/s. In the event of a reflection, the wave's distance doubles. The distance covered by sound wave in one second is comparable to 170 metres down to a canyon wall + 170 meters back.

Therefore, in above given ways,  speed of each wave can be expressed.

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Which evidence is an indication that a chemical reaction has occurred?


A)formation of a gas


B)melting of a substance


C)boiling of a substance


D)freezing of a substance

Answers

A. Formation of a gas. You can tell a chemical reaction has occurred through: formation of a precipitate, formation of a gas (also known as bubbles) unexpected color change, unexpected odor change, temperature change.

what is the relationship with a Wave medium

Answers

Explanation:

medium: The material or empty space through which signals, waves or forces pass. direction of propagation: The axis along which the wave travels. wave: A moving disturbance in the energy level of a field.

Answer:

medium: The material or empty space through which signals, waves or forces pass. direction of propagation: The axis along which the wave travels. wave: A moving disturbance in the energy level of a field.

Electromagnetic waves can transfer with or without blank

Answers

Answer:

Molecules

Explanation:

Electromagnetic waves are not like sound waves because they do not need molecules to travel. This means that electromagnetic waves can travel through air, solid objects and even space.

-Alexis

Answer:

Watch Naruto that's the answer

Explanation:

Jk it monocles

Choose the nonrenewable energy sources below.

Answers

Answer:

Coal, fossil fuels, electricity

Explanation:

1. Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.

Answers

The motion of spring is similar to that of sound wave in that the direction of the particles of the medium is parallel to the direction of the wave.

Motion of spring

The motion of a spring pushed forward and backward under goes simple harmonic motion that forms a sinusoidal path. In this type of motion, the direction of the particles of the medium is parallel to the motion of the wave.

Sound wave

Sound wave is mechanical wave in which the direction of the particles of the medium is parallel (longitudinal) to the motion of the sound wave.

Thus, motion of spring is similar to that of sound wave in that the direction of the particles of the medium is parallel to the direction of the wave.

Learn more about sound wave here: https://brainly.com/question/1199084

Describe one piece of evidence that the wave carries energy from one place to another.

Answers

Answer:

Without shifting matter the entire distance, waves can transfer energy over distance. For instance, without the water itself moving many kilometers, an ocean wave may move many kilometers. The stream, a motion known as a disruption, goes up and down. It is the disruption that flows in a wave, transferring power.

Explanation:

DUE SOON PLEASE HELP WILL MAKE FIRST ANSWER BRAINLIEST!!!

You have explored some interesting, informative, and amusing examples of models. Now it's time to get creative and make your own model. Here is the requirement checklist for your model:
-Model types can include drawings, diagrams, physical models, virtual simulations, or videos.
-Models must be created by you, not something selected from an online or outside source.
-Submit a presentation, picture, video, or screenshot of your model.
-Submit a one-paragraph summary describing the topic you chose, your model, what it represents, how you made it, and the specific science involved. It is important that you are using science terminology and are accurate.

Now that you know how to create and submit your model, you will need to choose a topic for your model. Choose one of the three topics listed below. Select each topic for an overview.

1- Conservation of Mass-Explore the law of conservation of mass. Model a physical or chemical change, and then demonstrate how mass is conserved before and after the change.
2- Atomic Theory-Explore the atomic theory of atoms. Create a model that represents the motion and intermolecular attractions of particles in solids, liquids, and gases.
3- Thermal Energy-Explore the effects of thermal energy. Model how adding or removing thermal energy affects motion in particles in a pure substance, such as water, or in a chemical reaction.
!!PLEASE CHOOSE ONE OF THE 3 ABOVE!!

Answers

Answer:

Choice 3

Explanation:

I think it would be the easiest

i think that the choice 3 would be the easiest! good luck and if you have any questions, feel free to ask me :)

As frequency is increased, wavelength …
finish the sentence

Answers

The wave length decreases

Which of the following is true of an atom?
a. The negative electrons are in motion around the positive nucleus to which they are attracted.
b. The positive protons are in motion around the negative neutrons to which they are attracted.
c. The negative neutrons are in motion around the neutral nucleus to which they are attracted.
d. The neutral electrons are in motion around the positive protons to which they are attracted.

Answers

Answer:

il get back to you soon with the answer

Explanation: need to eat lunch

The negative electrons are in motion around the positive nucleus to which they are attracted is true related to atom. Thus option a is correct.

What are atoms?

Atoms are defined as the smallest unit into which matter can be divided without the release of electrically charged particle.

It is also defined as a building block of all the matter, created after big bang theory.

Electrons are defined as a negatively charged subatomic particles that together with protons and neutrons form an atoms nucleus.

Nucleus are defined as the central region of an atom where the majority of masses are concentrated and contains protons and neutrons.

Thus, the  negative electrons are in motion around the positive nucleus to which they are attracted is true related to atom. Thus option a is correct.

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What is convection?

a Transfer of heat through objects touching the source

b Transfer of heat through direct physical contact

c Transfer of heat through electromagnetic waves

d Transfer of heat through the movement of particles

Answers

I think it’s d sorry if I’m wrong

how waves affect matter at the macroscopic and particle levels.

Answers

In a macroscopic object, each particles wave is being absorbed and combined with the waves of the other particles to create one wave for the entire object. Since this object is able to be seen, the wave function immediately collapses.

Anytime you possess anykind of information about the world around us, some wave, somewhere function collapses.

In short, if we can see the object, then it has no wave function.

1. Pick an example of a wave. Describe one piece of evidence that the wave carries energy from one place to another.

Answers

Answer:

mass

Explanation:

Mass.........................


Whats the effect of this?
A wave enters a medium where its wave speed is slower.

Answers

Answer:

Wave speed, frequency and wavelength in refraction

Although the wave slows down, its frequency remains the same, due to the fact that its wavelength is shorter. When waves travel from one medium to another the frequency never changes. As waves travel into the denser medium, they slow down and wavelength decreases.

Explanation:

havvee advvanncceed

Answer:

Waves. Refraction is an effect that occurs when a light wave, incident at an angle away from the normal, passes a boundary from one medium into another in which there is a change in velocity of the light. Light is refracted when it crosses the interface from air into glass in which it moves more slowly.

Calculate the mass of a liquid with a density of 4.7 g/mL and a volume of 15 mL. *
anyone i give brainest

Answers


Mass = 70.5 grams
D = m/v
D=4.7 g/mL
V=15mL
4.7=m/15
4.7=1/15m
M=70.5g

Calculate the mass of a liquid with a density of 4.7 g/mL and a volume of 15 mL. pls help me

Answers

Answer:0.31

Explanation:that the answer

Answer:

biraz naruto izle

Explanation:

When complete, the lab report should be read as a coherent whole. Make sure you connect different pieces with relevant transitions. Review for proper grammar, spelling, punctuation, formatting, and other conventions of organization and good writing.

Answers

Answer: you need to specificlly write down what you did for your lab report and do what all of thet stuff says to do

Explanation:

Answer:

So I went threw the student guide and read it carefully. Then I went threw the walk threw with the teacher and the step by step guide to get the lab done. when did multiple test an example is the height of the track and we did multiple times on that height to see it the results where same or had little difference.  As I went threw it I recorded the data because I was asked to. then i filled out the questions for the lab!

Explanation:

just did it hope it helps future people

Hi, Im new! But, why is physical and chemical changes are different?

Answers

Answer:

Physical and chemical changes are different because one deals with changes to ones shape or form, while chemical is changing one substance to another.

Explanation:

A example of a physical change would be cutting a block of wood into a cube of would, its physical change changes from a block to a cube. A chemical change is changing the substance into another substance so for example, burning that cube of wood in a fire. The fire is burning the wood into ash meaning it's no longer wood but ash.

Hope this helps.

Anybody want to share dark jokes?
And just so this doesn’t get taken down

Why does water and milk have to be pasteurized before it is consumed?

Answers

Answer:

i laughed at a dead body lowkey

Explanation:.

Answer:

Because pasteurization kills harmful organisms responsible for such diseases as listeriosis, typhoid fever, tuberculosis, diphtheria, Q fever, and brucellosis. Pasteurizing is important to prevent these diseases....I hope this helps you

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