Physics Middle School

Which best contrasts an electric generator and an electric motor? In a generator, slip rings function as a solenoid, and in a motor, an armature functions as a solenoid. In a motor, slip rings function as a solenoid, and in a generator, an armature functions as a solenoid. A generator converts electrical energy to kinetic energy, and a motor converts kinetic energy to electrical energy. A generator converts kinetic energy to electrical energy, and a motor converts electrical energy to kinetic energy.

Answers

Answer 1

Answer: (D)

A generator converts kinetic energy to electrical energy, and a motor converts electrical energy to kinetic energy.

Explanation:

Just remember a generator makes electricity, and motors move things therefore creates kinetic energy.

Answer 2

The best contrast between an electric generator and an electric motor is,

A generator converts kinetic energy to electrical energy and a motor converts electrical energy to kinetic energy. The main difference between the two is, that the generator works on the principle of Electromagnetic induction, and the motor works on the principle of the Effect of Magnetic field on a current-carrying coil.

Electromagnetic Induction:Electromagnetic induction is the process of generating electric current with a magnetic field. Whenever a current flowing conductor is passing through lines of force in a magnetic field, electrical energy is generated.In this way a generator converts mechanical energy into electrical energy

Effect of Magnetic field on a current-carrying coil:A force is applied when an electric current is present in a magnetic field. This results in mechanical action.In this way an electric motor converts electrical energy into mechanical energy.

Thus, the best contrast between a generator and an electric motor is the energy conversions. A generator converts mechanical energy into electrical energy and an electric motor converts electrical energy into mechanical energy.

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Related Questions

In this lab, you will use a magnet and a simple circuit to examine the concepts of electricity and magnetism. Think about how these ideas can be shown experimentally. In the space below, write a scientific question to address by doing this experiment.

Answers

Sample Response: How can magnetic and electric fields be demonstrated?

Electromagnetism is defined as the branch of physics, in which interaction between electric and magnetic fields is studied.

In the presence of a magnetic field, the electrons move and produce an electric current. The experiment in which electromagnetism can be shown in the making of an electromagnet.

The electromagnet is a type of magnet, in which a magnetic field is generated due to the presence of electric current.

The experiment in which magnet and simple circuit can examine the concepts of electricity and magnets is making of an electromagnet.

To perform the experiment, the things required are:

copper wire, battery, iron nail, and other small magnetic things.

Steps for conducting the experiments include:

The copper wire should be wrapped around the iron nail. The one end of the wire should be loose. The wire should form the coil-like structure on the nail.

The plastic coating of the wire from the loose ends should be removed. The uncoated wires should be attached to the different terminals of the battery.

Now, the iron nail should be placed near the small magnetic objects. Thus, the magnetic objects will be attracted to the iron nail, explaining the phenomenon of the electromagnetism.

In the presence of electric fields, the iron nail can be treated as an electromagnet.

Question:

How does the electric field propagate through the magnetic field?

Therefore, electromagnets are the classic demonstration of electric and magnetic fields working together.

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In a pulley setup that has a moving pulley, __________.

A.) you have to pull the string a greater distance, but the force needed to lift the mass is cut in half
B.)you have to pull the string a greater distance, and it takes more work to lift the mass
C.) you don't have to pull very much to lift the mass
D.)your work doubles because the pulley moves

Answers

The usual setup of moving pulleys will reduce the force needed to lift a load is cut in half, BUT the distance to be moved is doubled.
Thus the same amount of work is required to lift the same load the same distance between pulley setups with or without a moving pulley.

In a pulley setup that has a moving pulley, you have to pull the string a greater distance, but the force needed to lift the mass is cut in half.

Which stars have the lowest absolute brightness?
Supergiants
Giants
Yellow stars
Dwarfs

Answers

Answer:

DWARFS

Explanation:

Answer:

Dwarfs

Explanation:

I got it right on my test :)

Hope this helped!~

xox

a bat experts a 120 N force on a 0.134 kg baseball for 0.04 seconds. what impolse is excerted on the bat

Answers

The impulse exerted by a force F on an object in a time [tex]\Delta t[/tex] is given by
[tex]I = F \Delta t[/tex]
In our problem, we have a force of 120 N: F=120 N, applied to the baseball for a time of [tex]\Delta t=0.04 s[/tex]. Therefore the impulse is
[tex]I=F \Delta t = (120 N)(0.04 s)=4.8 Ns[/tex]

why does biodiversity contribute to a habitats sustainability

Answers

The two factors that contribute tobiodiversity are the richness in the number of different species available in the ecosystem, or the richness in the number of individuals of the one species. This is because each species has a role in the ecosystem on which other organisms depend for survival.

every species has a role in their ecosystem on which other organisms depend on for survival

Which magnetic property best describes a magnet’s ability to act at a distance?

Answers

magnetic field describea magnet's ability to act at a distance

Magnets have magnetic fields.

An embryo created by male-female reproduction has traits from _____.

A.the male only
B.the female only
C.both the male and the female
Please help I will mark as most brainliest

Answers

C.) Both male and female
Hope this helped!

The answer would be C. If a person has one parent with blond hair and blue eyes another with brown hair and eyes it is possible for them to have brown hair and blue eyes. That means that it is possible to have traits from both parents.

the small wobble in the orbit of Neptune helped astronomers discover Pluto. this suggests that this wobble was MOST LIKELY caused by A) fusion B) gravity C) friction D) magnetic attraction

Answers

Most likely gravity, because the gravity would pull it off course or wobble.

The small wobble in the orbit of Neptune helped astronomers discover Pluto. This suggests that this wobble was MOST LIKELY caused by

A) fusion. x

B) gravity. correct

C) friction. x

D) magnetic attraction. x

From the usa testprep website

The waves that have shorter wavelengths than visible light are: (check all that apply)

Radio Stations

Ultraviolet Waves

Gamma Rays

Microwaves

Answers

Ultra violet
Gamma rays

------------------

The waves that have shorter wavelengths than visible light are gamma rays and UV rays. Microwaves and radio waves are longer waves than visible light.

What is electromagnetic spectrum ?

The electromagnetic spectrum is the arrangement of waves in the order increasing frequency or decreasing wavelength. The order of the spectra starts from radio waves, microwaves, infrared, visible light, ultraviolet, x -rays and gamma rays.

The visible light that we can see is in between IR and UV rays. Hence, visible light has a frequency greater than IR rays but shorter than IR. Similarly visible light is longer than UV- rays but less frequency than UV rays.

Gamma rays are the most energetic and shorter waves in the electromagnetic spectrum with smaller wavelength and greater frequency. Hence, options b and c are correct.

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A ski lift carries people along a 220-meter cable up the side of a mountain. Riders are lifted a total of 110 meters in elevation. What is the idea mechanical advantage of the ski lift?

Answers

Final answer:

The Ideal Mechanical Advantage (IMA) of the ski lift is 2. It is calculated by dividing the total length of the lift cable by the total change in elevation.

Explanation:

The question is asking about the Ideal Mechanical Advantage (IMA) of a ski lift. The IMA is determined by the ratio of the distance over which the input force is applied to the distance over which the output force is applied.

In the case of a ski lift, the input force is applied over the entire length of the cable, while the output force is applied over the change in elevation. Therefore, the IMA of the ski lift would be the total length of the cable (220 meters) divided by the total change in elevation (110 meters), giving an IMA of 2.

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In the alpha decay of Francium-221, what daughter element is produced? (You may need to refer to the periodic table in the lesson.)

Answers

In an alpha decay, the original nucleus decays into a daughter nucleus + an alpha particle, which consists of 2 protons and 2 neutrons.
The atomic number (number of protons) of the Francium is 87, and since in the decay it loses 2 protons, the atomic number of the daughter nucleus should be 85. Looking at the periodic table ,this corresponds to Astatine, and therefore this is the element produced in the alpha decay of Francium-221.
Moreover, the mass number (number of protons+neutrons) decreases by 4 (because an alpha particle carries 2 protons+2 neutrons), therefore in the reaction the mass number will decrease from 221 to 217.
So, the daughter element is astatine-217.

217 AT

85 (i don't have enough characters so ignore this part)

A car has a mass of 1000 kg and is moving with a velocity of 10 meters/second. What is the momentum of the car?

Answers

P=M*v
1000*10= 10,000
The momentum of the car is 10,000

Find the angle formed by two forces of 7N and 15N respectively if its result is worth 20N

Answers

First, you need to make certain assumptions before solving this question. Why? Because there are no information given about the direction of these forces. In such questions as above, ALWAYS make the following assumptions:

1) Take first force, say [tex]F_{1}[/tex], and assume that it is pointing towards the x-direction.

Let us take the 7N force! By keeping the above assumption in our minds, the force vector would be like:
[tex]F_{1}[/tex] = [tex]7i[/tex], where [tex]i[/tex] = Unit vector in the x-direction.

2) Take the second force, say [tex]F_{2}[/tex], and assume that it is making an angle [tex] \alpha [/tex] with the first force [tex]F_{1}[/tex].

Let us take the 15N force! By keeping the above assumption in our minds, the forces vector would be like:

[tex]F_{2} = (15*cos \alpha)i + (15*sin \alpha )j[/tex]

Now from simple vector addition, we know that,
[tex]F_{R} = F_{1} + F_{2}[/tex] --- (A)

Where [tex]F_{R}[/tex] = Resultant vector.
NOTE: In equation (A), all forces are in vector notation. Assume that there is an arrow head on top of them.

Let us find [tex]F_{1}+F_{2}[/tex] first!
[tex]F_{1}+F_{2}[/tex] =  [tex]7i+(15*cos \alpha)i + (15*sin \alpha )j[/tex]

=> [tex]F_{1}+F_{2}[/tex] =  [tex](7+15*cos \alpha)i + (15*sin \alpha )j[/tex]

Now the magnitude of [tex]F_{1}+F_{2}[/tex] is,
| [tex]F_{1}+F_{2}[/tex]| = [tex] \sqrt{ (7+ 15*cos \alpha)^{2} + (15*sin \alpha )^{2}}[/tex]

=> | [tex]F_{1}+F_{2}[/tex]| = [tex]\sqrt{ 49 + 225*(cos \alpha)^{2} + 210*(cos \alpha)+ 255*(sin \alpha )^{2}}[/tex]

Since [tex](sin \alpha)^{2} + (cos \alpha)^{2} = 1[/tex], therefore,

=> | [tex]F_{1}+F_{2}[/tex]| = [tex]\sqrt{ 49 + 225 + 210*(cos \alpha)}[/tex]

Since  | [tex]F_{1}+F_{2}[/tex]| = |[tex]F_{R}[/tex]|, and the magnitude of the resultant force is 20N, therefore,

|[tex]F_{R}[/tex]| = | [tex]F_{1}+F_{2}[/tex]|
20 = [tex]\sqrt{ 49 + 225 + 210*(cos \alpha)}[/tex]

Take square on both sides,
400 = [tex] 49 + 225 + 210*(cos \alpha)[/tex]
[tex](cos \alpha) = \frac{3}{5} [/tex]

[tex] \alpha = 53.13^{o}[/tex]

Ans: Angle formed by the two forces, 7N and 15N, is: 53.13°

-israr

Which of the following is the best evidence that work has been done on or by an object?

Answers

The answer is A.The energy of the object has changed.

The change in the energy of an object is the best evidence that work has been done on or by an object. Thus, the correct option is A.

What is Work done?

Work is done on an object or by an object whenever a force is applied on the object that moves it over a certain distance or change the energy of the object. This movement is a result of energy change.

We can calculate the energy transferred to an object, or the work done, by simply using the formula where we multiply the force by the distance moved in the direction of the force applied.

Therefore, Energy transferred = work done = force × distance moved in the direction of the force.

W = f × d

Therefore, the correct option is A.

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The power of imagination helps a scientist to propose valid scientific explanations about the solar system use biased methods to answer questions about the solar system pose questions about the solar system which are not reasonable create theories about the solar system which are not acceptable

Answers

The first option is the correct answer - The power of imagination helps a scientist to propose valid scientific explanations about the solar system. As the option implies, what the scientist gets by imagination is simply a proposition (scientifically called an hypothesis), since there is limited evidence. The scientist's imaginations, and the propositions thereof, is the starting point for further investigation that yields valid scientific theories.

The power of imagination is integral to proposing scientific theories, particularly in the study of the solar system; however, these theories must be tested against experimental data to be accepted. Kepler's imaginative approach led to the formulation of laws that underpin our understanding of planetary motion, highlighting the scientific method's reliance on creativity tempered by empirical validation.

The power of imagination plays a crucial role in the scientific method, especially when it comes to understanding the solar system. Scientists use their creativity to construct theoretical models of how the universe could function and then perform experiments to see which models hold. For example, the work of Johann Kepler, who proposed the laws of planetary motion, showcases how imaginative concepts can lead to significant scientific advancements. While Kepler's models were initially based on mystical ideas, they eventually contributed to our modern understanding of celestial dynamics. Thus, the imaginative component of science allows for the proposal of new and sometimes revolutionary theories, but ultimately, it's through experimentation and data that these theories are validated or refuted.

Science thrives on new ideas and is always ready to assess the validity of different models and theories through careful experimentation. As new data come to light, scientists continuously refine their theories to reflect the most accurate understanding of the natural world. This process illustrates the dynamic and adaptive nature of scientific inquiry, which values empirical evidence overall.

Diamonds are a very dense material. Predict what would happen to the light ray if you projected it from air through a diamond.

Answers

It [the diamond] would act like a prism, and make a rainbow, or, the light would break up and disappear

Hope I helped!
~Mathlete12321

With the density given, the thing that'll happen to the light ray is that the diamond would act like a prism, or the light would break up and disappear.

What is density?

Density simply means the degree of compactness of a substance. It's the degree of consistency meaured.

Diamonds are a very dense material. The thing that would happen to the light ray if you projected it from air through a diamond is that the light will disappear.

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The metric unit of measurement for force is the _____.

pound
Newton
foot-pound
Newton-meter

Answers

Newton is the answer

The metric unit of force is the Newton.

According to the Academic Honesty Policy, plagiarism is ______.

Answers

UMUC. this is for the blank answer.

The formula for calculating work is ___.

force divided by distance
force multiplied by distance
power divided by time
distance multiplied by time

Answers

Hey!

Formula for calculating work = Force × distance
Work done = Force applied on the object × distance travelled by it.

Hope it helps...!!!

The formula for calculating work is force multiplied by distance; that is the second option, as work is a measure of the energy transferred to or from an object and is calculated by multiplying the force with distance.

What is the work done by an object?

Work is a physical concept that describes the energy transferred when a force is applied to an object and is caused to move a certain distance and work is said to be done which can be positive, negative, or zero, depending on the direction and magnitude of the force. The formula expresses the fact that the amount of work done on an object depends on both the magnitude of the force applied and the distance, and is written as W = F x d.

Hence, the formula for calculating work is force multiplied by distance; that is the second option.

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which statement accurately describes what happens when ice melts in terms of energy

Answers

When the ice melts, it changes from a solid state to a liquid state.

When it is heated, the kinetic energy of the molecules that compose it, increases, the energy that the ice received, is transformed into potential energy and the content of kinetic energy stays constant. This causes a variation in the order of the ice molecules, which have a fixed position when the matter is in solid state.

In terms of energy the ice absorbs energy causing the molecules of water to have more kinetic and potential energy, changing their configuration from a solid to a liquid.

In the food web shown above, which of the following organisms can be classified as a tertiary consumer?
A.
puffin
B.
jellyfish
C.
krill
D.
eiders

link:https://app106.studyisland.com/pics/200922foodweb.jpg

Answers

Hello,

Here is your answer:

The proper answer to this question is option A "puffin".

Your answer is A.

If you need anymore help feel free to ask me!

Hope this helps!

A? If I’m wrong sorry. Have a good day

I need help fast. what is the definition of Kinetic molecular model

Answers

it state that the average kinetic energy from a gas particle depends only on the temperature of the gas

PLEASE PLEASE HELPP
Which of the following describes how the Mid-Atlantic Ridge formed on Earth at a divergent plate boundary?

Plates moved in closer
Plates slid past each other
Plates moved with each other in the same direction
Plates moved apart

Answers

According to my research on Wikipedia, the plates moved apart and/or slid past each other. I hope this helps. Have a great supercalifragilicsticexpialidocioius day!

It is when plates move in closer together as plate material is subducted and is lighter and more gaseous that magma in the mantle so it rises to the surface and pushes up between the gap in the plates to form the Mid Atlantic Ridge

Which is an action that can cause an object to move or change its state of motion

Answers

The answer is force.

FORCE is the answer

a plane takes off at 34 m/s if it accelerates from rest and takes 7.2 seconds to lift off find the acceleration

Answers

See attachment for your Answer.

Which of the following explains how heat flow within Earth changes its surface?

Molten material moves in one direction, moving the plates in the opposite direction
Molten material moves in one direction, moving the plates in the same direction
Cyclical movement of molten material moves plates in different directions
Cyclical movement of molten material moves all plates in one direction

Answers

The appropriate answer is C. Cyclical movement of molten material moves the plates in different directions. The cyclical movement refers to convection current in the mantle that are driven by heat from the earth's core. The heat from the core heats the the layer of the mantle closest to it. This layer is now less dense than its surroundings which forces it to rise. Once this rising plume reaches the base of the crust it cools and now becomes more dense than surrounding layers so it sinks.

These continuous convection currents cause the crustal plates to converge, diverge or slide past each other in opposite directions.

Answer:

Explanation:

just trust me

A spaceship orbiting earth flies to the moon. How is the gravitational force pulling on the spaceship related to the distance that the spaceship is from the earth? As the distance from the earth decreases, the gravitational pull on the spaceship would decrease. The gravitational pull of the earth is constant and therefore the gravitational pull on would not change. There is no gravity on the moon and therefore only the earth will exert gravitational force on the spaceship. As the distance from the earth increases, the gravitational pull on the spaceship would decrease.

Answers

The correct answer is "As the distance from the earth increases, the gravitational pull on the spaceship would decrease."

In fact, the gravitational force (attractive) exerted by the Earth on the spaceship is given by
[tex]F=G \frac{Mm}{d^2} [/tex]
where G is the gravitational constant, M the Earth's mass, m the mass of the spaceship and d the distance of the spaceship from the Earth. As we can see from the formula, as the distance d between the spaceship and the Earth increases, the gravitational force F decreases, so answer D) is the correct one.

What is an atom? what are electrons,protons,and neutrons?

Answers

An atom is the building block of all matter. Electrons, protons and neutrons make up the atom. protons and neutrons make up the nucleus of the atom, and the electrons are on the electron shell.

Atom is the basic unit of a chemical element. An electron is the negative charge in every atom. A proton is the positive charge of every atom. A neutron is neutral.

A particular star is white. Another star that is much hotter is expected to be ______.
red
yellow
orange
blue

Answers

blue

hope this helps :)

Blue would be my final answer

Which of the following statements about the Sun is true?

Answers

The answer is C.

The sun's size is average compared to other stars in the galaxy, and there are billions of stars in the galaxy.

Hope this helps!

Hi there, friend!

I believe C is the correct choice.

~Brooke❤️

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An elementis made up of compoundsis a homogenous mixturecan be divided by physicalcannot be divided into smaller substances by chemical means One factor of f(x)= 4x^3-4x^2-16x+16 is (x 2). What are all the roots of the function? Use the Remainder Theorem. how do a numner consumers in a marketplace affect demand In the diagram Shown a 2 foot wide flower border surrounds the heart shaped pond.What is the area of the border? How many possible outcomes exist when two fair coins are flipped and a three-section spinner is spun? What is the relative size and composition of the universe, a galaxy, and a solar system? Is the universe endless? ABCD?Which is the answer please help x Catholicism of the Western Roman Empire was centered in A. Rome. B. Constantinople. C. Greece. D. Russia. The higher u hold something above the ground? A. The less potential B. The more kinetic energy it has C. The more potential energy it has A farmer uses genetic engineering to inject dairy cows with a genetically altered hormone (GAH) to result in the production of more milk. What might be a risk of using this technology to produce milk? A. Use of the GAH may allow the farmer to reduce milk prices. B. Use of the GAH may increase the amount of hormones in the milk. C. Use of the GAH may provide extra milk to feed the poor. D. Use of the GAH may increase the availability of milk. Can someone pls help me?? Three times the number of blue marbles exceeds twice the number of red marbles by 18 also five times the number blue marbles is two less than six times number of red marbles how many of each are there What did the Confederates believe? Molly says that 4/8 is always the same 1/2. Andrew says that 4/8 and 1/2 are equivalent fractions, but they could be different amounts. Volume of a Cylinder The average monthly amount Isabella has spent on gasoline since 1990 is shown in the table. Use the data in the table to complete the statements. Let x be the number of years since 1990. The year 2005 corresponds to an x-value of . The function that best models the data, with numerical values rounded to the nearest hundredth, is f(x) = x + 22.08. Models have their limitations. For which year would this model not make sense to use? What is the name of the Roman god for Valentines Day? Which of these BEST describes why decolonization began to occur in Africa after World War II?A) Africans began forming trade unions and helping independence movements. B) European countries were no longer making money from the business on the continent. C) European countries could no longer afford to stay in Africa after the expensive war. D) Africans joined in the fighting of World War II help free themselves of the colonizers. The Civil Rights Act The following is an excerpt from Section 201 of the Civil Rights Act passed in 1964. Read the passage and answer the questions. Transcript of Civil Rights Act (1964) TITLE IIINJUNCTIVE RELIEF AGAINST DISCRIMINATION IN PLACES OF PUBLIC ACCOMMODATION SEC. 201. (a) All persons shall be entitled to the full and equal enjoyment of the goods, services, facilities, and privileges, advantages, and accommodations of any place of public accommodation, as defined in this section, without discrimination or segregation on the ground of race, color, religion, or national origin. (b) Each of the following establishments which serves the public is a place of public accommodation within the meaning of this title if its operations affect commerce, or if discrimination or segregation by it is supported by State action: (1) any inn, hotel, motel, or other establishment which provides lodging to transient guests, other than an establishment located within a building which contains not more than five rooms for rent or hire and which is actually occupied by the proprietor of such establishment as his residence; (2) any restaurant, cafeteria, lunchroom, lunch counter, soda fountain, or other facility principally engaged in selling food for consumption on the premises, including, but not limited to, any such facility located on the premises of any retail establishment; or any gasoline station . . .What is the main idea of Section 201 of the Civil Rights Act?A. To ban segregation based on race, but not on ethnicity B. To ban segregation only in schoolsC. To only allow segregation in places that would be separate but equal D. To ban segregation and other forms of discrimination in public places Consider the normal activation of the gene for polygalacturonase in model 3. what is the end result of activation of this gene