In an electric motor, the armature spins due to the interaction between the magnetic field produced by the stator (the stationary part of the motor) and the magnetic field produced by the armature itself.
Here's a simplified explanation of the process:
Supplying Power: When electric current flows through the motor's coils (which are part of the armature), it creates a magnetic field around the coils. This process usually involves a commutator and brushes to direct the current flow in the coils effectively.
Magnetic Fields: The stator also has its own set of coils that are arranged in such a way that when current passes through them, they create a magnetic field. This magnetic field interacts with the magnetic field produced by the armature.
Electromagnetic Force: Due to the interaction of these magnetic fields, an electromagnetic force is generated. This force causes the armature (which contains the coils) to rotate. The direction of rotation depends on the direction of the current and the orientation of the magnetic fields.
Continuous Rotation: As long as the electric current is supplied to the motor, this process continues, resulting in continuous rotation of the armature.
In summary, it's the interaction of magnetic fields generated by the armature and the stator, along with the flow of electric current, that causes the armature to spin in an electric motor.
Which organism in the food web above is sometimes a first-level consumer and sometimes a second-level consumer?Explain
The smallmouth bass is the organism in the food web that can be a first-level consumer or a second-level consumer depending on its diet.
Explanation:In the given food web, the organism that is sometimes a first-level consumer and sometimes a second-level consumer is the smallmouth bass.
The smallmouth bass is a first-level consumer when it feeds on the primary consumers, such as crayfish and insects. However, it can also be a second-level consumer when it feeds on other first-level consumers, like the minnows and sunfish.
Therefore, the smallmouth bass can occupy different trophic levels depending on its diet, making it a versatile consumer in the food web.
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Please Help!
Complete each sentence or statement.
15. like charges____and opposite charges________.
16. A complete path through which charge can flow is an electric____.
17. To calculate power, multiply voltage measured in ____ by _____ measured in amps.
18. The magnetic field lines of a bar magnet begin near the magnet's_______.
19. A charged particle moving in a magnetic field will be deflected in a direction ______ to the magnetic field.
20. In a solenoid, there will be no magnetic field if there is no ______ in the wires of the coil.
21. Large power plants in the united states use ___________ generators.
Circular motion occurs only at or near earths surface true or false
Answer:
FALSE
Explanation:
Circular motion refers to the motion of an object in a circular path. This occurs at or near the surface of the earth as well as outside the earth in the space. This can be supported by the following pieces of evidence-
(1) The moon and the other artificial satellites that are moving constantly around the earth in a circular path.
(2) The planets going around the sun forming the solar system also maintains a circular and elliptical plane.
(3) Tying a stone with a rope and swinging it in circles maintaining a constant velocity also satisfies the condition of circular motion at or near the surface of the earth.
Thus, the above-given statement is false.
Which statement does NOT explain the concept of the Doppler Effect?
The answer is: As a sound source moves away from a stationary object, the sound waves are compressed, increasing the pitch.
Why?
Do I just have the question wrong I am so confused I thought that as a sound source moved away, the sound waves don't compress decreasing the pitch?
Plz help!!!!!
*best answer gets brainliest*
25 POINTS FOR CORRECT ANSWER
Stefan is writing a report about the law of reflection. In his report, he says that the angle of incidence is the angle between the surface of the mirror and the incoming ray. Do you agree with him? Why or why not?
The angle of incidence is the angle formed between the incident ray and its normal drawn on the plane. So, his statement is wrong.
What is law of reflection ?Law of reflection states that, when a light ray falls on a reflecting surface and gets reflected, the angle of incidence becomes equal to the angle of reflection.
Here,
The report given by Stefan is about the law of reflection. In the report, he says that the angle of incidence is the angle between the surface of the mirror and the incoming ray.
This not correct and I disagree with his statement because,
The angle of incidence in optics is defined as the angle formed between the incident ray on the surface and the normal drawn at the point of incidence at the surface of the mirror.
The formation of angle of incidence is given in the figure.
Hence,
The angle of incidence is the angle formed between the incident ray and its normal drawn on the plane. So, his statement is wrong.
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Attaching the image here.
What is the period of a wave if the wavelenght is 110m and the speed is 200m/s? 2 s 100s 200,000 s 0.5 s
Answer:
hello im not here to answer the question, sorry.
There is somthin familar about your name Katelyn.
Are you Katelyn.H? from k12, 8th grade? because Im Rukaiya
Explanation:
The Invariable wave property in the Doppler effect is the
The answer to you qustion is velocity
-got 95%
a cup on a table is pushed horizontally with a force of 0.7N. the cup remains at rest. what are all the forces that make up the net force on the cup, and what is the net force on the cup, in newtons
You move a 2.5 kg book from a shelf that is 1.2 m above the ground to a shelf that is 2.6 m above the ground. What is the change in potential energy of a system containing the book and Earth?
The change in potential energy of the book, moved from 1.2 m to 2.6 m above the ground, is 34.3 J.
Change in Potential Energy of a Book
To find the change in potential energy of the system containing the book and Earth, we use the formula for gravitational potential energy: PE = mgh, where m is the mass, g is the acceleration due to gravity (approximated as 9.8 m/s²), and h is the height.
First, calculate the initial potential energy of the book when it is at 1.2 m:
PEinitial = mghinitial
PEinitial = (2.5 kg)(9.8 m/s²)(1.2 m) = 29.4 J
Next, calculate the final potential energy of the book when it is at 2.6 m:
PEfinal = mghfinal
PEfinal = (2.5 kg)(9.8 m/s²)(2.6 m) = 63.7 J
The change in potential energy (ΔPE) is the difference between the final and initial potential energy:
ΔPE = PEfinal - PEinitial
ΔPE = 63.7 J - 29.4 J = 34.3 J
Thus, the change in the potential energy of the system is 34.3 joules.
the force of the racket and the opposite force of the tennis ball do not cancel each other out. why?
Wind energy is used to rotate the sails of a windmill. The rotating sails have A) heat energy. B) kinetic energy. C) potential energy. D) electromagnetic energy.
three features describe the motion of an object. they are...
A) direction, speed, energy
B) position, direction, and speed
C) energy, position, and direction
D) position, direction and energy
A ball is thrown into the air
#26: Why is spear fishing much more successful for scuba divers than someone spear fishing from above the water? Explain your reasoning related to light waves.
(OSS.01)
Based on the Nebular theory, which of these is a step in the formation of a new planetary system? (1 point)
evaporation of water
nuclear fission of gases
repulsion of gaseous masses
change of gases into liquids
2. (OSS.01)
A student explains the Nebular theory of formation of planets as follows.
"A cloud of gas and dust in space, called nebula, began to rotate and condensed into a flattened disk. Gravitational force pulled the gas and dust closer together. This resulted in the nuclear fusion of gases and dust to create the sun and planets at the outer flattened portion of the disk."
What is the flaw in the student's explanation? (1 point)
nuclear fission created the sun and planets
the nebula evaporated instead of condensing
the sun was formed at the center of the nebula
gravitational forces kept the gases well separated
3. (OSS.01)
The diagr
The answer is the evaporation of water. As the gas begins to collapse, thermonuclear fusion as a result of the immense gravity at the center of the cloud results in the generation of immense heat and radiation that turns solids and liquid into gaseous form, close to the center of the cloud.
There is a flaw in the statement “This resulted in the nuclear fusion of gases and dust to create the sun and planets at the outer flattened portion of the disk." The sun forms in the center of the cloud since the gravitation effect that drives thermonuclear fusion are strongest in this region. Planets form in the outer regions of the accretion disks where matter attract each other into clumps and gain even more gravitational pull to yank even more matter.
The Nebular theory of planetary system formation does not involve the evaporation of water, nuclear fission of gases, repulsion of gaseous masses, or the change of gases into liquids.
Explanation:The steps involved in the formation of a new planetary system according to the Nebular theory include:
Evaporation of water: This step is not part of the Nebular theory. The theory focuses on the formation of planets from a cloud of gas and dust in space. Water evaporation is not mentioned in this process.Nuclear fission of gases: Nuclear fusion, not fission, is the process that occurs in the core of the Sun, leading to the release of energy. Fusion involves the merging of atomic nuclei, not the splitting of them.Repulsion of gaseous masses: This is not a step in the formation of a new planetary system according to the Nebular theory. Instead, gravitational force acting on the cloud of gas and dust causes them to condense and come closer together.Change of gases into liquids: The Nebular theory explains the formation of planets from gas and dust, not the change of gases into liquids. The condensation of gas and dust leads to the formation of solid bodies like planets.Learn more about Nebular theory of planetary system formation here:https://brainly.com/question/1477348
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a 63 kg object needs to be lifted 7 in a matter of 5 Seconds approximately how much horsepowers is required to achieve this task
What is the mechanical advantage of a hockey stick that is gripped at point D and hits the puck at point A?
Two charged objects have a repulsive force of .080 N. if the charge of both of the objects is doubled, then what is the new force?
Answer:
0.32
Explanation: The guy above me said the answer was 4 times the original number. 0.08 times 4 equals 0.32
If the charge of both of the objects is doubled, then the new force would be 0.32 N.
Force between two charged objects
The electrostatic force between two charged objects is determined by using Coulomb's law as follows;
F = kq₁q₂/r²
when the charges are doubled
F₂ = k(2q₁)(2q₂)/r²
F₂ = 4kq₁q₂/r²
F₂ = 4F
F₂ = 4 x 0.08 N
F₂ = 0.32 N
Thus, if the charge of both of the objects is doubled, then the new force would be 0.32 N.
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Four large grocery food chains sell approximately how much of the nation’s food?
one-fourth
one-half
three-fourths
100 percent
Answer:
one-fourth
Explanation:
In a recent year, over 1 trillion was spent on food in the US, about half of that at grocery stores, and about half for restaurants, food service, and other food outlets. About 250 billion was spent at the four largest grocery chains.
Approximately one-fourth of the nation's food is sold by the four largest grocery chains.
Four large grocery food chains sell approximately three-fourths of the nation’s food
To understand why three-fourths is the correct answer, let's consider the context of the question. The question asks for the approximate percentage of the nation's food sold by four large grocery food chains.
Here are the options provided:
- one-fourth
- one-half
- three-fourths
- 100 percent
Now, let's analyze these options:
- If one-fourth of the nation's food were sold by these chains, it would mean that three-fourths is sold by other, smaller chains or independent stores, which seems unlikely given the market share of large chains.
- If one-half of the nation's food were sold by these chains, it would still imply a significant portion of the market is held by smaller entities, which might be possible but is not the best answer given typical market concentrations.
- If three-fourths of the nation's food were sold by these chains, it would indicate a high level of market consolidation, which is more in line with what we know about the grocery industry in many countries, where a few large chains control a substantial portion of the market.
- If 100 percent of the nation's food were sold by these chains, it would mean there are no other significant sellers of food in the nation, which is highly unlikely.
Given this information, three-fourths is the most accurate approximation of the market share controlled by four large grocery food chains. It reflects the reality that while these chains are dominant, there is still a considerable portion of the market served by other retailers, including smaller chains, independent stores, and specialty markets.
Which statement about the free enterprise system is true?
The free enterprise system allows the citizen to own and operate a private business for profit.
The basic principles of a free enterprise system were laid out by Scottish philosopher Adam Smith in an influential book published in 1776: An Inquiry into the Nature and Causes of the Wealth of Nations. The Nobel-prize winning 20th century economist Milton Friedman said of Adam Smith, "The key insight of Adam Smith's Wealth of Nations is misleadingly simple: If an exchange between two parties is voluntary, it will not take place unless both believe they will benefit from it." Smith argued for such voluntary exchanges within a free market system. He labeled the government-manipulated economic system that was prevailing in his day as "mercantilism," a system in which governments specifically authorized some merchants as the official agents of commerce (rather than endorsing free enterprise). The mercantilist system also viewed wealth as though there were a fixed amount of it available in the world, represented by precious metals such as gold and silver, and that nations were in competition over who got more of that fixed amount of world wealth. Smith saw that wealth was something that could be created and increased through voluntary exchange and free enterprise. Smith's ideas formed the basis for what we have come to know as capitalism.
Match what is seen through a telescope in Column A with the information that is learned from it in Column B. Column A 1. the visible light spectrum emitted by a star : the visible light spectrum emitted by a star 2. the brightness of a star : the brightness of a star 3. the color of a star : the color of a star Column B a. the distance between the star and Earth b. the chemical composition of the star c. the temperature of the star
Answer:
the visible light spectrum emitted by a star → the chemical composition of the star
the brightness of a star → the distance between the star and Earth
the color of a star → the temperature of the star
Explanation: plato :3
Calculate the potential difference across a 25- resistor if a 0.3-A current is flowing through it. V
Answer:
7.5 V
Explanation:
Why does increasing the heat under a pan of boiling water not decrease the cooking time for hard-boiled eggs? (Select all that apply.)
increasing the heat under the pan will not raise the water temperature
increasing the heat under the pan will raise the temperature, but eggs are not affected by this
increasing the heat under the pan will only evaporate water faster increasing the heat under the pan will raise the pan temperature, but not affect the eggs increasing the heat under the pan will increase the boiling point of water and therefore not affect the eggs
Answer:
increasing the heat under the pan will not raise the water temperature
increasing the heat under the pan will only evaporate water faster
Explanation:
i got this question too, these are the right answers
why do hurricanes tend to form in warmer climates
A circuit is made of 0.4 ohm wire, 150 ohm bulb and a 120ohm rheo stat connected inseries. Determine the total resistance of the resistance of the circuit?
Land near the ocean along the coast experience weather that is more moderate than the inland climate. So along the coast you can predict that compared to inland weather it should be during the summer and during the winter
Coastal climates are moderated by the ocean's heat inertia, leading to cooler summers and milder winters compared to inland areas. This is due to water heating and cooling more slowly than land, which stabilizes temperatures year-round.
Explanation:Coastal areas tend to experience more moderate weather compared to inland areas due to the influence of large bodies of water like oceans. The heat inertia of water means it heats and cools much more slowly than land does, resulting in coastal climates that are less variable and more moderate, even in places far north that would otherwise experience extreme temperatures. During the summer, one can expect that coastal areas would be cooler than inland regions because the ocean absorbs and retains heat more slowly. Likewise, winters along the coast are typically milder than those experienced inland because the ocean retains heat from the summer longer, releasing it slowly over time.
Facts such as Norway's coastal areas remaining ice-free through winter despite being within the Arctic region, and Canada's west coast receiving significant precipitation, illustrate how nearby water bodies moderate local climates. Similarly, urban areas in Australia like Sydney, Melbourne, and Adelaide experience moderate Type C climates because they are near the ocean, which tends to stabilize temperatures throughout the year, making them more mild compared to the greater fluctuations found in inland or more extreme latitudinal locations.
as the temperature of the water gets colder, the speed of its molecules:
To test the hypothesis that plants grow faster in green light, a student set up 3 of the same type of plants. She placed the first plant under a green light, the second plant under a regular light bulb, and the third plant under a red light. What is the dependent variable in this experiment?
what are some chemical properties of oreos??