Answer:
1
Explanation:
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
Answer:
98% sure the answer is A, as coal, when burning, releases thermal and light energy through the fire.
Explanation:
please help me eseghgtrhj
The correct answer is C.
WILL GIVE BRAINLIEST IF YOUR RIGHT!!!! Please hurry
Answer:
1 = celsius 4 = watts 5 = displacement/time 6= distance/time
Explanation:
3= newtons 2= joules
What is the average kinetic energy of an object's particles?
Question 3 options:
Heat
Thermal Energy
Thermodynamics
Temperature
please include explanation
What is the average kinetic energy of an object's particles?
the answer is temperature
In this image of Earth and the Moon from the Sim, what does the circle around Earth represent?
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
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
Answer:The total kinetic and potential energy of its particles
Explanation:
True or False: Waves become stronger as they travel away from their source
Answer:
False
Explanation:
They become weaker as they travel away from their source.
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
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 gThe 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,
https://brainly.com/question/12355314
#SPJ6
Water that is moving across Earth’s surface is called
erosion
sediment
runoff
precipitation
Answer:
I'm pretty sure the answer is runoff
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.
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?
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.
Create a kwl chart of electromagnetism marking brainlest
k=know
w=want
l=learn
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:
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.
Answer:
mercury
Explanation:
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?
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
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?
Answer:
the awnser is c
Explanation:
i took the test
Apple juice in a bottle has a volume of 475 cubic centimeters and a mass of 494 grams .Calculate its destiny
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
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.
Answer:
500n
Explanation:
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
Answer:
The answer is B.
Explanation:
Which of the following metals is most reactive?
A. aluminum
B. sodium
C. copper
D. calcium
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.
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.
Answer:
1,000
Explanation:
because the ground won't stop the ball so it is always going to stay the same
Objects that are denser than water will sink in water. Question 1 options: True False
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 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
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
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)
Help me please it’s urgent
Answer:
I Think A But Im Not Sure About It
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.
What is the connection between our sense of hearing and our balance?
I'll give brainlest to whoever answers first.
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.
9. If you have two or more risk factors for a disease, you will get the disease no matter what you do. True False
Answer:
id say false
I might be wrong but ye i think its false
Explanation:
What must be true about the system for this to be possible?
