Physics Middle School

In the first law of thermodynamics, ΔE=Q−W , what does Q stand for?


the change in the internal energy of the system


the work done by the piston


the internal energy of the system


the heat added to the system

Answers

Answer 1

Answer: The change in the internal energy of the system

Explanation:

The first law of thermodynamics states that the change in internal energy of a system equals the net heat transfer into the system minus the net work done by the system. ... ΔE= change internal energy of the system.

Answer 2

Answer:

THE ANSWER IS DOWN BELOW :)

Explanation:

In The First Law Of Thermodynamics, E=QW , What Does Q Stand For?the Change In The Internal Energy Of

Related Questions

What type of energy travels through space as waves?

chemical

thermal

electromagnetic

potential

Answers

Answer:

electromagnetic energy

Radiant energy is the energy of electromagnetic waves

In a heat engine, if 500 J of heat enters the system, and the piston does 300 J of work.

What is the final internal (thermal) energy of the system if the initial energy is 1,500 J?


200 J


800 J


1,300 J


1,700 J

Answers

Answer: The final answer is 1,700 J

Explanation: According to first law of thermodynamics:

=Final energy-initial energy=Change in internal energy

q = heat absorbed or released

w = work done by or on the system

w = work done by the system=  {Work done by the system is negative as the final volume is greater than initial volume}

q = +500J   {Heat absorbed by the system is positive}

w = work done by the system = -300J

U2- 1500J= + 500J --300J

U2= 1700J

1700 J you’re welcome

Two students drop an object into sand from a height of 1.5 meters. They record the depth of the hole made in the sand by each student’s object. What is the most likely explanation for the results?

Answers

Answer:

C.

Explanation:

The greater kinetic Energy and object has the great velocity, and often mass an object has (I'm not 100% sure but this is my best guess)

Tissues types
Please help

Answers

Answer:

Explanation: what grade are u in?

plz help the ones i looked up are wrong
As a girl pushes a bike up a hill, the _____.

kinetic energy of the bike is increasing

kinetic energy of the girl is increasing

potential energy of the bike is increasing

potential energy of the bike is decreasing

Answers

Answer:

As a girl pushes a bike up a hill, the kinetic energy of the bike is increasing.

Explanation:
As a bike goes up hill it’s easy to determine wether it’s decreasing or increasing depending on which way it goes downhill or uphill!

Please answer it correctly. I’ll give brain-list to correct answer

Answers

Answer: I'm sure it's B.

Explanation: Magnets attract paper clips because magnets have a magnetic field, which creates a force, that pulls on other ferromagnetic materials. A paper clip is usually made of steel wire. Steel is an alloy of iron and carbon. Iron is a ferromagnetic material that is attracted by magnets. Hope this Helps!

It’s B. Bc the magnetic force travels through that’s why when you put both negatives of a magnet towards each other they don’t stick theres always a little after

Density of water is 1000 kg/m^3. What will be the volume of 35000 kg water?

Answers

Volume = mass/density
Volume = 35000/1000
Volume = 35m^3

The melting point of pure water is _____.

32°C

100°C

0°C

212°C

Answers

Answer:

0°C and 32°F

Explanation:

ihavetotypemoresouhyeahig

The melting point of pure water is _____.

32°C

100°C

0°C

212°C

The answer is 0

Cell Structure and Functions Activity

Being a scientist isn't all about using microscopes, beakers, and Bunsen burners. Scientists do a lot of reading to gain knowledge. It also helps them stay current with new theories, tools, and technologies. For this assignment, you are going to read like a scientist!

Open the article The Amazing World Inside a Human Cell. After you read the article, answer the questions on the activity worksheet. You will submit your completed worksheet for grading. Be sure to review the grading rubric before you begin.

Answers

Answer:

Labster’s virtual lab simulations allow students to work through real-life case stories, interact with lab equipment, perform experiments and learn with theory and quiz questions.

A Labster virtual lab simulation is an immersive 3D interactive learning environment. The learning environment may look like a laboratory – or sometimes like a forest or like the desert plains of our imaginary exoplanet, Astakos IV.

Over 1000 schools, colleges, and universities around the world are using Labster as a pre-lab, supplemental learning resource, or as a replacement for a face to face lab during the pandemic.

Explanation:

Answer:Labster’s virtual lab simulations allow students to work through real-life case stories, interact with lab equipment, perform experiments and learn with theory and quiz questions.

A Labster virtual lab simulation is an immersive 3D interactive learning environment. The learning environment may look like a laboratory – or sometimes like a forest or like the desert plains of our imaginary exoplanet, Astakos IV.

Over 1000 schools, colleges, and universities around the world are using Labster as a pre-lab, supplemental learning resource, or as a replacement for a face to face lab during the pandemic.

Explanation:

ASAP PLS HELP

Which statement accurately describes what happens when water turns to steam in terms of energy?


The water absorbs energy which causes the water molecules to have more kinetic and potential energy, changing their configuration from a liquid to a gas.


The water absorbs energy which causes chemical bonds to break, changing water to steam.


The water releases energy which causes chemical bonds to break, changing water to steam.


The water releases energy which causes the water molecules to have less kinetic and potential energy, changing their configuration from liquid to gas.

Answers

Answer:

The water absorbs energy which causes chemical bonds to break, changing water to steam.

Explanation:

The first answer is correct,
the water releases energy which causes chemical bonds to break, changing water to steam.

An example for this could be when you put a pot of water on the stove and you see steam coming from the boiled water.

If the thermal energy of the system increases by 400 J, and 1,100 J of heat were added to the system, how much work did the system do?


400 J


700 J


1,100 J


1,500 J

Answers

Answer:

700 j

Explanation:

The answer is 700 J. Hope I helped have a great day!

7 the grade science I REALLY NEED HELP!!! WILL MARK BRAINLIEST!!
What is the name of each structure?
Choices:
o bone
o cartilage
o ligament
o muscle
o tendon

Answers

Answer:

(I might be totally wrong)

A=muscle

B=ligament

C=cartilage

D=tendon

E=bone

Darwin observed fossils of glyptodonts, which are now extinct. Living armadillos are the only animals remaining on Earth that are similar to glyptodonts. Armadillos live in the same places that glyptodonts lived.

What did Darwin most likely conclude about the two types of animals?

Glyptodonts were better adapted to the environment.
Glyptodonts outcompeted armadillos for food.
Glyptodonts were early relatives of armadillos.
Glyptodonts had the exact same adaptations as armadillos.

Answers

Answer:

3. Glyptodons were early relatives of armadillos.

Explanation:

Darwin would have come to this conclusion because glyptodons over time became armadillos, which you can tell by evolution that they were better evolved to survive than glyptodons. Due to this, they outlived the glyptodons.

Answer:

C Glyptodons were early relatives of armadillos.

Explanation:

Darwin would have come to this conclusion because glyptodons over time became armadillos, which you can tell by evolution that they were better evolved to survive than glyptodons. Due to this, they outlived the glyptodons.

Explanation:

Wher is the Continental Shelf on the East coast of the United states the Widest?

Answers

Explanation:

The widest continental shelf is from Siberia all the way to the Arctic Ocean The widest continental shelf is about 930 miles long (1,500 km)

Answer:

im pretty sure it is:

The continental margin off Cape Hatteras, North Carolina (at 35° North latitude) displays the typical Atlantic Ocean shelf-slope-rise sequence (Fig. 1a). Off the Georgia/South Carolina coast, however, the continental margin is anything but typical

Explanation:

The families on the period table is arranged and organized based on common

A. Properties
B. States of Matter
C.Types of elements

Answers

Answer: by atomic mass

Explanation:

Max hears on the news that a total solar eclipse will be visible from his town in the coming week. Which of the following explains why the total solar eclipse will be visible where Max lives?
A. His town will be located within the umbra during the eclipse.
B. His town will be located within the penumbra during the eclipse.
C. A total solar eclipse is visible from all places on Earth's night side.
D. A total solar eclipse is visible from all places on Earth's day side.

Answers

i believe that the answer is A but correct me if i’m wrong

Can someone please help me with my answer?

Answers

Answer:

student 2 is correct.

Explanation:

isotopes of the same element have the same number of protons in the nucleus but a different number of neutrons.

Why do plates moves?


A.Convection currents in the Lithosphere move the plates.

B. Lithosphere plates move into a trench away from the ridge.

C. Lithosphere plates move away at a ridge.

D. Convection currents in the Mantle move the plates.

Answers

I believe the answer is D, there is a chance the answer is a but im not too sure
Tectonic shift is the movement of the plates that make up Earth's crust. ... The heat from radioactive processes within the planet's interior causes the plates to move, sometimes toward and sometimes away from each other. This movement is called plate motion, or tectonic shift.

Please help me (I struggle with this subject)

Answers

Answer:

What happens: The copper wire will spin around. When the wire touches the top of the battery and the magnet, it is making a circuit, which allows electrons to flow – this is the current. ... This force, which is called a Lorentz Force, acts on the wire and causes it to move, which makes the wire spin around.

Explanation:

Plz mark me as brainliest

Answer:

The answer is A :)

A student is drawing a diagram to show the positions of Earth, the Moon, and the Sun
during a full moon.
Where on the diagram should the student place the moon to accurately show its
position relative to the Earth and the sun during a full moon? A.1 B.2 C.3 D.4

Answers

D.4

rays of sunlight hit the moon fully at this position

To depict the positions of the Earth, the Moon, and the Sun during a full moon, a student is creating a diagram. The moon should be placed before earth. The correct option is D.4

What is a full moon day?

A natural satellite is a moon. The moon orbits the planets. On each planet, there are a variable number of moons, ranging from only one on Jupiter to numerous on Earth.

The moon's various phases are visible in various parts of Earth as it orbits the planet. There are many shapes like the moon is full, C-shaped or crescent moon and no moon.

Full moon day is when the moon is fully visible to the earth. The round moon. It happens every 28 days.

Therefore, in the diagram, the moon will be placed at the number 4, before, the earth. The correct option is D.4

To learn more about full moon day, refer to the below link:

https://brainly.com/question/8690537

#SPJ6

Which electromagnetic waves can have wavelengths of 300 nm?
A. visible light
B. microwaves
C. ultraviolet waves
D. X-rays

Answers

I believe that the answer is A

If a liquid is heated and the temperature at which it boils is measured, the _____ property is being measured.

molecular

atomic

chemical

physical

Answers

Answer: atomic think so

Explanation:

Answer:

Physical.

Explanation:

It is physical because atomic is dealing with something with the elements constructing the substance. Molecular is similar. Chemical is changing the chemical makeup of a substance. So through the process of elimination, it is physical.

Anand’s height is 156 cm. He stands in front of a large vertical plane mirror. If the distance of
image from Anand is 4 m, how far is Anand from the mirror?
please show work
fasttt!!!

Answers

Two meters cause the distance between him and his reflection is double the distance between him and the mirror

Would you classify petroleum as a renewable or nonrenewable resource? Justify your answer in two or more complete sentences.

Answers

Answer:

Petroleum is a nonrenewable resource. This being because it is a natural gas that take millions of years for it to reform which means each part of it is a once in a lifetime use.

In a parallel circuit, if one bulb goes out the other bulbs will continue to work because they each have their own path.

a. True

b. False

Answers

Answer:b

Explanation:

False! The answer is B!

This question is about light transmission.

Answers

When a light wave with a single frequency strikes an object, a number of things could happen. The light wave could be absorbed by the object, in which case its energy is converted to heat. ... When this occurs, objects have a tendency to selectively absorb, reflect or transmit light certain frequencies.

Answer:

When light hits an object, it is transmitted, absorbed, and/or reflected. The light on the left is reflected, the light in the middle is absorbed and the light on the right is transmitted. Any object you can see must at least partially reflect light to your eyes. Objects can ALSO absorb and/or transmit light.

What are the chemical symbols?

Answers

The one on the left is O for oxygen the one on the right is F for fluorine
I agree O for oxygen and F for fluoride

Why do scientists believe the universe is still expanding?
a.The further away an object is, the higher the temperature and pressure eventually become, causing nuclear fusion
b. Distant objects shift in frequency toward red on the electromagnetic spectrum, which tells us objects are moving away from us
c. Spiral galaxies spin, so they appear to be a rotating disk of stars and dust
d. Distant objects shift in frequency toward blue on the electromagnetic spectrum, which tells us objects are closer to us us

Answers

I don’t understand the question

riddle of the day

What gets wet while drying?

Answers

Answer:

A towel!

Explanation:

The towel gets wet when it dries something off!

Answer:

lol a towel?

Explanation:

because like- I don't know but you get where I'm coming from right?

Hey there! I need help with this question, it's about electromagnets. No absurd answers, please. I will be flagging them. Thanks!

Answers

Answer: D Moreecethadev get's 5 stars, Thanks.

Explanation:

Answer is D.

Answer: I think it’s C. because it definitely needs more wire but it also needs a higher voltage to pick up more, so I don’t know but I think C.

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His Detroit Industry Murals a National Historic Landmark-celebrated Americanindustry and Detroit's factory workers' strength and dignityLatino/a Americans have been some of the most vocal and successful advocates for civil rights in the United States. During the 1960s, labor activistsDolores Huerta and Cesar Chavez formed the United Farm Workers of America, a joint Latino/a and Filipino organization that created the firstpermanent agricultural labor union in the United States. Along with the efforts of Filipino activists like Larry Itlong the UFW establishedheadquarters at Forty Acres in Delano. California's farm workers successfully executed the Delano grape strike and boycott, which drew nationalattention to unsafe working conditions and resulted in a 1970 settlement with California's entire table grape industry.1Select the correct answer from the drop-down menu.Read the excerpt. 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ANSWER ASAP Determine the number of moles in each of the following:45.2 g Ag67.1 g Cr53.9 g MnDetermine the number of grams in each of the following:1.56 mol K2.5 mol Ba110 mol HeDetermine the mass in grams of each of the following:5.04 x 1024 atoms N2.01 x 1024 atoms Ca8.32 x 1021 atoms SnDetermine the number of particles contained in each of the following:50.3 g Cu145g Si0.67 g Cl Please help me!! I really need a grade boost!! Of the pizzas recently sold at Pizza Pies, 6 had pepperoni and 26 did not. Considering this data, how many of the next 16 pizzas sold would you expect to have pepperoni? Draw a Lewis structure for H3O+ . Include all hydrogen atoms and show all unshared electrons and the formal charges, if any. Assume that bonding follows the octet rule. My question is below this:)))) have a great dayyyy.