Answer:
Greenhouse gas emissions from transportation primarily come from burning fossil fuel for our cars, trucks, ships, trains, and planes. Over 90 percent of the fuel used for transportation is petroleum based, which includes primarily gasoline and diesel.
Explanation:
An Expert, please answer this question!
A student made the table shown to list some contact and non-contact forces.
Which statement best explains why the table is incorrect?
A)Spring force is a force acting at a distance.
B) Air resistance is a force acting at a distance.
C) The student and desk have to be in contact to apply the force.
D) The electromagnet and wire have to be in contact to apply the force.
Incorrect answers = 2 stars (Nothing personally just to let others know so they don't get a bad score)
Correct answer = 5 stars and a thanks! (And maybe Brainliest!)
Incomplete/Absurd/link answers = 1 star and I will report (if it's incomplete I will ask you to finish it but if you don't iI will report and give 1 star)
Answer:
C) The student and desk have to be in contact to apply the force.
Explanation:
I am pretty sure :)
Answer:
C
Explanation:
Friction is similar to drag. Like drag it acts on an object in the opposite direction from the object’s motion.
How does the friction slow motion?
Answer:
• Friction is a force that occurs when two surfaces slide past
one another.
• The force of friction opposes the motion of an object,
causing moving objects to lose energy and slow down.
• When objects move through a fluid, such as air or water, the
fluid exerts a frictional force on the moving object. The
frictional force from a fluid is called a drag force.
• Friction examples: tires skidding to a stop on a road,
sandpaper rubbing against wood, air pushing against the
nose of an airplane
• Friction drag force causes objects to slow down as they move through a
fluid, such as air or water.
• Drag force depends primarily on the following variables:
– Cross‐sectional area of an object moving through the fluid
– Speed of moving object
– Density of the fluid
– Drag coefficient (determined by experiments; related to the shape of
the object)
• Drag force is especially dependent on the speed of an object. As an
object’s speed increases, the drag force from the fluid increases
exponentially.
• For example, when you drive at high speeds, the frictional force of air on
the car increases and fuel economy decreases
Hope this helps, have a nice day/night! :D
scientist created diagram X to represent the molecules of a kind of gas in a closed container. Diagram Y represents the molecules in the container after the size of the container was reduced. The temperature in the container was not changed. What most likely happened to the system when the scientist changed the size of the container? A. Matter was added. B. Matter was removed. C. The pressure increased. D. The pressure decreased.
The most likely outcome when the scientist changed the size of the container is that the pressure increased.
Option (C) is correct.
When the size of the container is reduced while keeping the temperature constant, the gas molecules experience a decrease in volume. According to Boyle's law (P₁V₁ = P₂V₂), if the volume decreases, the pressure of the gas will increase.
Diagram X represents the initial state with larger volume, and diagram Y shows the final state with reduced volume. Since the temperature remains constant, the pressure must change to counterbalance the change in volume.
As the volume decreases, the gas molecules have less space to move around, and they collide more frequently with the container walls. This increased collision rate results in a higher pressure exerted by the gas on the container walls.
Hence, the most likely outcome when the scientist changed the size of the container is that the pressure increased, which corresponds to option C.
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If my skater begins at a height of ______ meters, then the skater will have enough total energy to successfully complete the skate park ramp from start to finish. (Fill in the blank with a height between 0 and 10 meters.)
JUST PLS FILL IN THE BLANK
Answer: 5
Explanation:
If my skater begins at a height of 5 meters, then the skater will have enough total energy to successfully complete the skate park ramp from start to finish
Brainliest me
If my skater begins at a height of 5 meters, then the skater will have enough total potential energy to successfully complete the skate park ramp from start to finish.
If my skater starts at a height of 5 metres, he or she will have enough total potential energy to complete the skate park ramp from beginning to end. Potential energy is a physics notion that is affected by an object's height and mass. Because of its position in a gravitational field, an object at a specific height above the earth has potential energy.
The skater has a particular amount of potential energy connected with their starting height of 5 metres. As they go down the ramp, this potential energy is turned into kinetic energy, or motion energy. As the skater moves down the ramp, their speed rises, as does their kinetic energy.
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How would you classify this atom of oxygen?
Answer:
Oxygen is a chemical element – a substance that contains only one type of atom. Its official chemical symbol is O, and its atomic number is 8, which means that an oxygen atom has eight protons in its nucleus. Oxygen is a gas at room temperature and has no colour, smell or taste. Oxygen is found naturally as a molecule.
Explain 3 examples of kinetic and Potential energy
Answer:
1. Planets; movement of planets around the sun and other stars in the galaxy is kinetic energy
2. Rubber Bands; can be classified as both potential and kinetic energy, depending on the state of the band (when stretch=potential energy; when released=kinetic energy)
3. Rivers; strictly kinetic energy. the water is constantly moving creating kinetic energy.
Explanation:
If two trucks are moving at the same speed, but truck A has a mass of 3,000 kg, and truck B has a mass of 4,500 kg, what statement is true?
Truck B has less kinetic energy.
Truck A has greater kinetic energy.
Truck B will have a greater stopping distance.
Truck A will have a greater stopping distance.
Answer:
Truck B will have a greater stopping distance.
Explanation:
I did it before
Can someone help me??? Its for Science Fair
I need to write a Rationale
My project is on candles and wax.
If it'll help, here is my hypothesis: If the waxes being tested are beeswax, palm wax, paraffin wax, and soy wax, then the palm wax should burn the slowest and last the longest.
Answer:
OK, you can say:
Waxes are a diverse class of organic compounds that are lipophilic, malleable solids near ambient temperatures. They include higher alkanes and lipids, typically with melting points above about 40 °C (104 °F), melting to give low viscosity liquids. Waxes are insoluble in water but soluble in organic, nonpolar solvents. Natural waxes of different types are produced by plants and animals and occur in petroleum.
And for more explanation you can visit
https://en.m.wikipedia.org/wiki/Wax
Why do you think the older scientist disregarded the younger scientist's prediction?
What is the function of peristalsis?
Multiple choice question.
A)
to move food through the digestive system
B)
to remove excess liquid from the body
C)
to chemically digest food to release nutrients
D)
to absorb nutrients into the blood
Answer: A
Explanation
The digestive tract carries out the function of peristalsis by moving food through the system. Peristalsis also removes excess liquid from the body. Chemical digestion breaks down food into small nutrients, but this process does not involve peristalsis. Finally, absorption of nutrients into the blood does not fall under the purview of peristalsis.
Are all mutations harmful? Explain.
Answer:
Most mutations are not harmful
Explanation:
but some can be. A harmful mutation can result in a genetic disorder or even cancer. Another kind of mutation is a chromosomal mutation. Chromosomes, located in the cell nucleus, are tiny threadlike structures that carry genes.
by the way this is copyed
Does a wave transport energy, matter, or both? Explain your answer in 1-2 sentences (Will give brainliest)
Answer in Explanation form
A wave carries its energy without transporting matter. Waves are seen to move into an ocean or lake, yet the water always returns to its resting position.
A wave transports energy, but not matter. Waves are created by the transfer of energy from one point to another, and they are able to transmit this energy over long distances without physically moving any matter.
What is a wave?A wave is a disturbance that travels through space and matter, transferring energy from one place to another. Waves can take many forms, including mechanical waves (such as sound waves and seismic waves) and electromagnetic waves (such as light waves and radio waves).
Waves are created by the transfer of energy from one point to another, and they are able to transmit this energy over long distances without physically moving any matter. For example, sound waves can transmit energy through the air without moving any air molecules, and light waves can transmit energy through empty space without moving any particles. However, waves can still have an impact on matter by interacting with it, such as when a wave causes an object to vibrate or when a wave of light is absorbed by a substance.
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When does the first step of digestion usually occur?
Multiple choice question.
A)
when the organism discovers the food
B)
when the food is chewed
C)
when the food is swallowed
D)
when the nutrients are absorbed
Answer:
B
Explanation:
Firstly, when the food is chewed then the saliva is secreted and mixed with food. Then the food is swallowed and nutrients are absorbed.
In both the Japanese and San Francisco earthquakes, fire killed more people than collapsing buildings. Why do you think this was the case?
How could you break down the compound calcium carbonate into the elements that make it up ? A. by melting B. by crushing C. with filter D. with chemical changes
Answer:
A: By melting
Explanation:
When calcium carbonate is heated it decomposes into calcium oxide and carbon dioxide.
Provide 3 examples of substances that are mixtures and list the substances in them.
Why does transporting materials during production release carbon dioxide?
-Materials release carbon dioxide as they move around in vehicles.
-Materials exposed to air get warm easily. The warm materials release more carbon dioxide.
-Materials break down as they move and cause pollution. Pollution releases carbon dioxide.
-Vehicles used to move materials consume fuel and release carbon dioxide.
Answer:4
Explanation:
5 SENTENCES DESCRIBE THE STEP BY STEP PROCESSES OF HOW THE IMMUNE SYSTEM PROTECTS US. Pls and thank u
Watch this video to help u with the question https://kidshealth.org/en/kids/ismovie.html?WT.ac=k-ra
Answer:
The immune system
Explanation:
The immune system has a vital role: It protects your body from harmful substances, germs and cell changes that could make you ill. It is made up of various organs, cells and proteins. As long as your immune system is running smoothly, you don't notice that it's there.
Write a paragraph comparing protons, neutrons, and electrons. Be sure to include mass, location, and electric charge.
Answer:
Explanation:
Dalton's Atomic Theory explained a lot about matter, chemicals, and chemical reactions. Nevertheless, it was not entirely accurate, because contrary to what Dalton believed, atoms can, in fact, be broken apart into smaller subunits or subatomic particles. We have been talking about the electron in great detail, but there are two other particles of interest to us: protons and neutrons. We already learned that J. J. Thomson discovered a negatively charged particle, called the electron. Rutherford proposed that these electrons orbit a positive nucleus. In subsequent experiments, he found that there is a smaller positively charged particle in the nucleus, called a proton. There is also a third subatomic particle, known as a neutron.
Protons, neutrons, and electrons are fundamental particles that constitute the building blocks of atoms.
Protons and neutrons are found in the nucleus, the central core of the atom, whereas electrons are located in electron shells surrounding the nucleus. Protons carry a positive electric charge and have a mass of approximately 1 atomic mass unit (amu).
Neutrons, on the other hand, are electrically neutral, meaning they have no electric charge, but they also have a mass of about 1 amu. Electrons, which are much smaller than protons and neutrons, have a negligible mass of approximately 1/1836 amu and bear a negative electric charge that exactly balances the positive charge of protons, resulting in an overall neutral charge for the atom. The combination of these three particles determines an element's chemical properties and behavior in chemical reactions.
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Why does an object with less mass move faster after a collision with an object with more mass?
Answer:
if two objects of different mass have the same momentum, then the object with the least mass has a greater velocity
The greater the force that is applied to an object of a given mass, the more the object will accelerate
Explanation:
For example, doubling the mass of an object results in only half as much acceleration for the same amount of force
Use the space below to tell the probability of Tom and Tina having a child with sickle-cell and explain how you determine that.
Provide 3 examples of substances that are mixtures and list the substances in them
Answer:
Water and salt = salt water
Oxygen and water = sea foam
Smoke and fog = smog
Explanation:
Hope this helped, nya~ :3
ILL GIVE U 100 POINTS!!!!
Using the letters from Betelgeuse and Aldebaran, see how many different words of four letters or more you can make in ten minutes. Each word you make counts as 5 points. Record your words in the Report document.
Answer:
I
Explanation:
There is a large marble with a large amount of mass, including kinetic energy. Not too far from it, there's a small marble with a small amount of mass that stands still. The large marble moves towards it and collides with the small marble.
When the large marble collides with the small marble, is the large marble transferring kinetic energy to the small marble?
Answer:
Yes it is I think
Explanation:
how do you word an informative essay in science class about newton's laws of motion seventh grade
Try looking at informative essays to help with the base then brain storm what your topic is about! this is the method that helps me the most! i will elaborate if needed! :)
Why do you think the older scientist disregarded the younger scientist's prediction?
Answer:
pls explain, can you show what the younger scientist did.
Explanation:
Draw Bohr diagrams for the following
example calculation for a.)
N = 39 - P
N = 39 - 19
N = 20
P = 19
HELP PLS 5 MINUTES
Which statement best compares competition, cooperation, and predation between two organisms?
Cooperation is a positive interaction between the two organisms, and predation and competition result in a negative interaction for at least one organism.
Cooperation and competition are positive interactions between the two organisms, and predation results in a negative interaction for at least one organism.
Cooperation and predation are negative interactions between the two organisms, and competition results in a positive interaction for at least one organism.\
Cooperation results in a negative interaction for at least one organism, and competition and predation are positive interactions between the two
Answer: Its the First One
Cooperation is a positive interaction between the two organisms, and predation and competition result in a negative interaction for at least one organism.
Explanation:
predation is preying on the other so its negative for at least one of them.
competition is fighting so its negative for at least one of them.
Cooperation makes them help each other so its positive.
Answer: predation is preying on the other so its negative for at least one of them.
competition is fighting so its negative for at least one of them.
Cooperation makes them help each other so its positive.
What is the Uncontrolled variables/limitations for this science expirement? Does the shape of an ice cube affect how quickly it grows? Need help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAP
What substances can be released in a volcanic eruption