Physics Middle School

Plz help
The energy diagram shows the changes in energy during a chemical reaction.
Which statement best describes the total energy change of the system?

Plz HelpThe Energy Diagram Shows The Changes In Energy During A Chemical Reaction.Which Statement Best

Answers

Answer 1

Answer:

the awnser is c

Explanation:

i took the test

Related Questions

What is the thermal energy of an object?

Question 2 options:

Its average temperature


Its ability to conduct heat.


The amount of radiation it emits.


The total kinetic and potential energy of its particles


please include explanation

Answers

The thermal energy of an object is the energy contained in the motion and vibration of its molecules. Thermal energy is measured through temperature. The energy contained in the small motions of the object's molecules can be broken up into a combination of microscopic kinetic energy and potential energy.

Answer:The total kinetic and potential energy of its particles

Explanation:

what energy transformation occur when propane gas is used to lift a hot air balloon?

A. Mechanical --> light --> chemical
B. Chemical ---> mechanical --> light
C. thermal --> chemical --> light
D. chemical --> thermal --> mechanical

Answers

Answer:

the answer is D. chemical, thermal, and mecanical

The energy transformation occur when propane gas is used to lift a hot air balloon is Chemical-> mechanical-> Light.

What is Propane gas role in hot air balloon?

Propane can be produced from the components of liquid which is recovered during natural gas processing. Also these components include ethane, methane, propane, and butane, as well as heavier hydrocarbons.

The molar mass of propane is C₃H₈ - (12x3) + (1x8)= 44 g/mol.The number of moles of propane present - 0.200 mol1 mol weighs - 44 gMass of propane present  - 8.8 g

The energy conversion for the propane, that is, energy transformations that occur when propane gas is used to lift the balloon will be:

The chemical propane will be burned at first.All the process in the balloon will be checked and concluded as good mechanism without any leakage.When the propane gas was fired the balloon goes up and its gets lifted with thermal energy.The thermal energy give the Light.

Thus, the process can be simplified as the Chemical energy converting to mechanical energy which later converted to thermal energy and to the Light energy.

Hence, Option B is the correct answer.

To know more about propane gas,

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WILL GIVE BRAINLIEST IF YOUR RIGHT!!!! Please hurry

Answers

Answer:

1 = celsius     4 = watts 5 = displacement/time           6= distance/time

Explanation:

3= newtons   2= joules

Temperature, Power, Speed, Work, Velocity, Force I think

Which of the following metals is most reactive?


A. aluminum

B. sodium

C. copper

D. calcium

Answers

Answer:

A. aluminum

Explanation:

Aluminium is soft, lightweight and ductile with excellent thermal and electrical conductivity. It is highly reactive, though the metal is protected by a surface layer of inert transparent oxide (Al2O3) that forms rapidly in air, providing excellent corrosion resistance.

a aluminum because sodium isnt really one so cross that out calcium cross that out copper nah but aluminum yes

If you were an engineer of an actual roller coaster, what information would you need to know to ensure that your coaster would be safe?

Answers

To ensure the roller coaster is 100% safe you would have to make sure that the acceleration is a a good force so it can be safe and you have to know how to uses the forces correctly like for example a big change in speed or direction it will make a bigger acceleration and a slower speed or a small change in direction would be a smaller acceleration.

Which factors affect the gravitational force between objects? Check all that apply.

difference in speed of objects
direction of movement of objects
distance between objects
masses of the objects
volumes of the objects

Answers

Answer:

difference between objects, volumes of objects, masses of objects

Explanation:

i think thats it

Answer:

Which factors affect the gravitational force between objects? Check all that apply.

difference in speed of objects ---- wrong

direction of movement of objects ----- wrong

distance between objects ---- correct

masses of the objects ---------- correct

volumes of the objects --- wrong

Explanation:

i risked my grade for this an hopefully people finds this helpful

What is an example of a reservoir?
1. Beach
2. Cloud
3. Desert
4. Lake

Answers

I think that the best answer is Lake.

A reservoir (/ˈrɛzərvwɑːr/; from French réservoir [ʁezɛʁvwaʁ]; lit. 'storehouse') is, most commonly, an enlarged natural or artificial lake, pond, or impoundment created using a dam or lock to store water.

Please give brainiest if correct, would rlly appreciate it :D

Answer:

Lake

Explanation:

The meaning of reservoir is a large natural or artificial lake used as a source of water supply.

PROCESS OF ELIMINATION

 ____________________

A beach is not a reservoir.

Clouds have little water so we cannot do that.

Desserts have little to no water

That just leaves us with 4, (Lake)

According to Archimedes' principle, when an object is placed in a fluid, the buoyant force acting on it is equal to the weight of the fluid the object displaces. Question 3 options: True False

Answers

But the Archimedes principle states that the buoyant force is the weight of the fluid displaced. So, for a floating object on a liquid, the weight of the displaced liquid is the weight of the object. Thus, only in the special case of floating does the buoyant force acting on an object equal the object's weight

please help me eseghgtrhj

Answers

The correct answer is C.

9. If you have two or more risk factors for a disease, you will get the disease no matter what you do. True False

Answers

Answer:

id say false

I might be wrong but ye i think its false

Explanation:

The answer is false ................

Scientists discovered how to use x-rays over 100 years ago. They found that x-rays
could pass through soft parts of the human body but were stopped by hard body
parts. How do doctors use x-rays today?
A.to find injuries
B.to cure diseases
C.to prevent illnesses
D.to protect body parts

Answers

A - to find injuries
A is the answer , bc doctors use it to look for any broken parts of the body or any damage parts

What is the average kinetic energy of an object's particles?

Question 3 options:

Heat


Thermal Energy


Thermodynamics


Temperature


please include explanation

Answers

What is the average kinetic energy of an object's particles?

the answer is temperature

The answer is Temperature!

The gravity of Earth is attracting a person towards the center with 500N of gravitational force. The person is exerting a reactionary force on the Earth with how much force? Explain your thinking behind this.

Answers

Answer:

500n

Explanation:

Gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter. ... On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects.

Help me please it’s urgent

Answers

Answer:

I Think A But Im Not Sure About It

the correct answer is A

What must be true about the system for this to be possible?

Answers

OH I DID THAT IN 7th grade, ok so the system must have enough gravity for you to continue to stay at the same pace up and down. You would have to have enough gravity so that eventually you don’t just stop.
ok, so the system must have sufficient gravity for you to continue to stay at the same pace up and down. You would have to have enough gravity so that eventually you don't just stop.

If a bowler rolls the bowling ball down the alleyway with a force of 1,000N. The ball exerts a reaction force again the alleyway with approximately how much force? Explain your thinking behind this.

Answers

It’s 1,000 because it stays the same

Answer:

1,000

Explanation:

because the ground won't stop the ball so it is always going to stay the same

True or False: Waves become stronger as they travel away from their source

Answers

Answer:

False

Explanation:

They become weaker as they travel away from their source.

Answer : false

Explanation:

Objects that are denser than water will sink in water. Question 1 options: True False

Answers

Answer: True

For example, a very dense metal will sink to the bottom while something like wood will float on the surface. The wood is less dense compared to the water, which is why it floats. Density is the measure of how much stuff you can pack in a certain volume. The higher the density, the more stuff per volume. Think of it like packing a suitcase. If there's barely anything in there, then we can say its density is low. The more stuff crammed in the suitcase will increase the density (and therefore the weight), while keeping the volume the same.

Answer:

true

Explanation:

i think

Which of the following statements uses a connotative word to evoke the most negative feeling?

Mary’s mother complained that Mary’s bedroom was messy.
Mary’s mother complained that Mary’s bedroom was neat.
Mary’s mother complained that Mary’s bedroom was untidy.
Mary’s mother complained that Mary’s bedroom was disorganized.

Answers

i think it’ll be a or d
It’s A yea gotta be or d

What is the connection between our sense of hearing and our balance?
I'll give brainlest to whoever answers first.

Answers

Answer:

When the head moves, fluid within the labyrinth moves and stimulates nerve endings that send impulses along the balance nerve to the brain. Those impulses are sent to the brain in equal amounts from both the right and left inner ear.

Explanation:

Answer:

well since you posted this 5 days ago then i will say thank you for the free points

Explanation:

also thank you if you have read this then i want you to know that god is always on your side no matter what so always make the right desitions.

Apple juice in a bottle has a volume of 475 cubic centimeters and a mass of 494 grams .Calculate its destiny

Answers

Oakoqmsoqpslqpwpwpw I honestly don’t know why is y’all middle school so difficult

Water that is moving across Earth’s surface is called

erosion
sediment
runoff
precipitation

Answers

Answer:

I'm pretty sure the answer is runoff

the answer is runoff .

A transverse wave has oscillations (movements) where the particles move perpendicular to the direction the wave is traveling. This means:

A. Both the medium and the energy move forward together

B. As the energy in the wave moves forward the medium moves up and down

C. As the medium moves forward the energy moves up and down

Answers

Answer:

The answer is B.

Explanation:

I think the answer is B

What is the best explanation for seasons?
1 point
A. The Sun orbits the Earth
B. The Earth spins once a day, causing day and night
C. The Earth is tilted, causing the incoming sun's rays to hit the rounded surface of the Earth at different angles in opposite hemispheres.
D. The Earth is father away from the Sun at times and closed at other times.

Answers

C is the correct answer! Trust me i promise lol
I believe the answer for this question is C.

Mike is doing a project for science class. He is making an analogy of a cell and relating it to the structure and function of a city. He is looking for a building to represent the mitochondria. Which building in a city has a similar function and would best represent the role of the mitochondria in the cell?

Answers

Answer: Mitochondria are organelles that make energy for a cell; they are inherited from ... In this chapter, we will look at the structure and function of the eukaryotic cell. ... to functions of a city to emphasize that all parts are needed. ... We begin by looking at ... cell, as he peered through a primitive microscope of his own construction.

The density of a substance equals its mass divided by its volume. Talia listed the density of some common materials at 20 °C.

Material
Density (g/cm3)
gasoline
0.70
mercury
13.6
milk
1.03
water
0.998

If Talia has 10 grams of each material, which material has the greatest volume?
Show your work below.

Answers

Answer:

mercury

Explanation:

Remember that volume = mass/density.
Therefore, if you have 10 grams of a substance, divide that by its density to find its volume.

In this image of Earth and the Moon from the Sim, what does the circle around Earth represent?

Answers

Answer: This is the orbit (of the moon around Earth).

An orbit is a circular/oval path that planets, moons, comets, etc follow with a "subject" in the middle. In this case, the circle is the orbit of the moon around Earth.

The circle around the earth represents the orbit.

What is an orbit?

It is considered to be the regular, repeating path where one object should be in space that takes around the another one. The object in the orbit known as the satellite. It could be in natural way such as earth or moon. Also, it is the circular oval path where the planets, moons could follow the subject.

Therefore, The circle around the earth represents the orbit.

Learn more about earth here: https://brainly.com/question/19766567

Based on Newton’s 3rd Law of motion, if an archer shoots an arrow at the target, the action force is the bowstring against the arrow. Explain where the reaction force can be found.

Answers

Answer: the reaction force is the arrows push against the bow sting

Explanation:the two objects must react the same , bowstring and arrow.

a student built a fire using coal. the coal started to burn. which statement best describes the energy changes that occurred.
A. the chemical energy stored in the coal changed to thermal energy and light energy
B. the thermal energy stored in the coal changed to light energy and chemical energy.
C. the light energy and thermal energy stored in the coal changed to mechanical energy.
D. the light energy and thermal energy stored in the coal changed to chemical energy

Answers

Answer:

98% sure the answer is A, as coal, when burning, releases thermal and light energy through the fire.

Explanation:

ANSWER: B. The thermal energy stored in the coal changed to light energy and chemical energy.
.
EXPLANATION: thermal energy is already within the coal and because of the light from the fire, that's obviously light energy. And in the end, there is a chemical reaction after the coal burns to ash, and that is chemical energy! I hope this helps!☺️ Please give Brainliest!!

Create a kwl chart of electromagnetism marking brainlest
k=know
w=want
l=learn

Answers

Answer:

I want to know what is electromagnetism

I know that it has something to do with magnets

I learned that the north pole and south pole stick together

Explanation:

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