Why do we use an electromagnet?

Answers

Answer 1
The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. ... Electromagnets are also employed in industry for picking up and moving heavy iron objects such as scrap iron and steel
Answer 2

Answer:

an electromagnet is simply coil of w


Related Questions

HELP DUE 3 MINUTES
Sssssdds

Answers

The last one is the correct answer,Also can I get brainliest

Answer:

&3?.&.)/&282/8//8338/.)9

Explanation:&3?.&.)/&282/8//8338/.)9

PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer this correctly!!!! (40pts)

Answers

Answer: object is not moving

Explanation:

Which phase of cell division is shown?

Exploring meiosis.


A. metaphase


B. prophase


C. anaphase


D. telophase

Answers

Answer:

Anaphase

Explanation:

This is because the spindle fibres have shortened and is pulling the chromatids towards the poles of the cell. The chromatids have also separated.

The cell division which is shown in the picture is anaphase. The correct option is C.

What are the phases of meiosis?

Meiosis is divided into two main phases, each with its own set of subphases:

1 Meiosis I:

a. Prophase I: This is the longest and most complex phase of meiosis. During this phase, homologous chromosomes pair up and form bivalents, and crossing over occurs between the homologous chromosomes. The nuclear envelope breaks down, and spindle fibers form from the centrioles at opposite poles of the cell.

b. Metaphase I: During this phase, the homologous chromosomes line up along the metaphase plate, with one chromosome from each homologous pair facing each pole of the cell.

c. Anaphase I: During this phase, the spindle fibers contract and pull the homologous chromosomes towards opposite poles of the cell.

d. Telophase I: During this phase, the chromosomes reach the poles of the cell and the nuclear envelope reforms around each set of chromosomes. The cell then undergoes cytokinesis, resulting in two daughter cells.

2. Meiosis II:

a. Prophase II: During this phase, the nuclear envelope breaks down, and spindle fibers form from the centrioles at opposite poles of the cell.

b. Metaphase II: During this phase, the chromosomes line up along the metaphase plate, with sister chromatids facing opposite poles of the cell.

c. Anaphase II: During this phase, the spindle fibers contract and pull the sister chromatids towards opposite poles of the cell.

d. Telophase II: During this phase, the chromosomes reach the poles of the cell and the nuclear envelope reforms around each set of chromosomes. The cell then undergoes cytokinesis, resulting in four haploid daughter cells.

Meiosis involves two rounds of chromosome segregation, resulting in four haploid daughter cells that are genetically distinct from the parent cell.

Therefore, The correct option is C i.e anaphase.

To learn more about Cell structure click:

https://brainly.com/question/22339852

#SPJ3

The diagram below shows some waves traveling along a rope.
State the type of waves travelling on the rope.
Explain how you can tell. *
(2 points)

Answers

-- Well first of all, the waves are transverse waves.  The fibers in the rope, and the hand that generates the waves, are moving up and down, but the wave is moving to the right, towards the wall.  These directions are perpendicular.

-- Later on, after the waves reflect from the wall and travel back toward the hand, there are going to be standing waves on the rope.  But this is probably beyond the scope of the question.

a celebrity i would like to meet mind map​

Answers

Answer:

I would wanna meet juice if he was still alive ofc

Explanation:

I would like to meet Micheal Jackson, he was the sweetest person ever! And one of the best artists in the world! :)

Calculate the power of a pump that can lift 70 kg of water through a vertical height of 16m in 10 seconds?

Answers

Answer:

1120

Explanation:

power =force ×velocity

=700*1.6=1120

What is the number of the strength of gravity on Earth?

Answers

Answer:

i don't know this answer

What are the main differences between the manual, oscillate and pulse functions?

Answers

What are the main differences between the manual, oscillate and pulse functions? Manuel function can be used when we move it. Oscillate function automatically moves on its own. The pulse function mimics the pulse of a heart rate and can only be used by pushing the button.

The main differences between the manual, oscillate and pulse functions are;

Manual function requires work when we move it. Oscillate function works with automation.The pulse function follow pulse of a heart rate is used for pushing the button.

A pulse can be regarded as a signal processing which is  is rapid, transient change in the amplitude of a signal from a baseline value to a higher or lower value.

The Oscillate function works with automation and it requires some automated system.

Learn more about function at;

https://brainly.com/question/25870256

why does a heater having low resistance heating coils get heated more?​

Answers

Answer:

Explanation:

That electrical energy will be dissipated in the form of heat, heating up the wire in the process. This heating is called Joule heating (James Prescott Joule) or ohmic heating or resistive heating. Which tells us that lower resistance (R) will produce higher current. Therefore lower resistance produces more heat.

Help quick (edge 2021)
What is the best description of a wave?
A) a pulse that carries energy
B) a disturbance that moves matter
C) a medium disturbed by a vibration
D) matter that is moved from one place to another

Answers

Answer:

a

Explanation:

Answer:

A) A pulse that carries energy

Explanation:

Edg.

Centripetal acceleration depends directly on the square of the object's speed and inversely on
the radius of the circle.

A-True

B-False

Answers

Answer:

True.

Explanation:

The formula for the centripetal acceleration of an object can be calculated by the formula as follows :

[tex]a_c=\dfrac{v^2}{r}[/tex]

Where

v is the speed of an object

r is the radius of the circle

It means, the centripetal acceleration depends directly on the square of the object's speed and inversely on  the radius of the circle. Hence, the given statement is true.

PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (40pts)

Answers

According to Newton’s second law, there is no acceleration.

What is the difference between velocity and acceleration?
A.
Velocity describes an object's position and acceleration describes how fast it moves.
B.
Velocity is how fast an object moves and acceleration is the rate of change in velocity.
C.
Velocity is used to determine the magnitude of force acting on an object, and acceleration isn't.
D.
Velocity is a time-dependent property of an object, while acceleration is not.

Answers

B is the answer to the question

PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (40pts)

Answers

Answer:

False, true

Explanation:

Answer:

an unbalanced force is always needed to a moving object FALSE

an object in motion will stay in motion unless it is acted on by an unbalanced force TRUE

Explanation:

Please Brainliest :)

Waves transfer _________________, not the _____________ with it. A ______________________ causes particles in matter to move back and forth at right angles to the direction in which the wave travels. High points in a transverse wave are called ________________. Low points are called ________________. A ________________ wave causes particles in matter to move back and forth along the same direction in which the wave travels. The places in a longitudinal wave in which the coils are squeezed together are called ______________. The places in the wave in which the coils are spread apart are called _________________. The ________________ of a transverse wave is the distance between two adjacent crests or two adjacent troughs. The _________________ of a compressional wave is the distance between two adjacent compressions or rarefactions.. The _____________ of a wave is the number of wavelengths that pass by a point each second. Frequency is measured in units of _____________. The ___________ of a wave depends on the medium in which the wave travels. To make a wavelength of rope shorter, one should shake the rope at a ____________ frequency. The speed of a wave can be found using the equation ________________. As the wavelength of a wave increases, the frequency of the wave _______________. The energy of a wave depends on its ______________________.

Answers

Explanation:

(Sorry but we can prosses your answer)

A high fountain of water is located at the center of a circular pool. Not wishing to get his feet wet, a student walks around the pool and measures its circumference to be 15m. Next, the student stands at the edge of the pool and uses a protractor to gauge the angle of elevation at the bottom of the fountain to be 55°. How high is the fountain?

Answers

Answer:

The fountain is 3.43 m high.

Explanation:

Circumference of the pool = 15 m.

C = 2[tex]\pi[/tex]r

where C is the circumference and r its radius.

r = [tex]\frac{C}{2\pi }[/tex]

 = [tex]\frac{15}{2(\frac{22}{7}) }[/tex]

r = 2.3864

radius of the pool = 2.40 m

So that the height of the fountain, h, can be determined by applying trigonometric function.

Tan θ = [tex]\frac{opposite}{adjacent}[/tex]

Tan 55 = [tex]\frac{h}{2.4}[/tex]

h = Tan 55 x 2.4

  = 1.4282 x 2.4

  = 3.4277

h = 3.43 m

The height of the fountain is 3.43 m.

Lighting McQueen goes from rest to 30 m/s in 3.0 seconds. What is his
acceleration ?

Answers

Answer:

10 meters per seconds or 10m/s

Explanation:


what is an electrical current which comes from a battery
which supplies a constant flow of electricity in one direction.

Answers

Answer:

Direct current

Explanation:

The current that is supplied by electric cells and batteries.Electons flows in one direction and does not change directions.

What do simple machines decrease the need for, in order to make work easier?

Answers

Answer:

Simple machines can actually make more work due to friction. Simple machines make work easier to do by decreasing the force required by increasing the distance over which the work is done. _____increasing___ the distance that force is applied.

Two by four about a three the espn by the Xbox 360 by the one two three and the logical by the fire the iso cohedron uh the Isosceles and the diameter by the three by four?

Answers

Answer:

divided by 2 plus one entity_secured_pace_nun_box 9 divided by oee burned akward potion tri tour all around divided by 3 divided by 4

Explanation:

So the first few words in this statement talks about two and four being equal to around three therefore giving you "divided by 2" as you need to divide the four by 2 and add one to get 3. The next statement "the espn by the Xbox 360", espn can be deemed as a secured entity that paces around a nun therefore giving you entity_secured_pace_nun and since this is being multiplied by a box and by 360, you apply the "Improve Rule of Baseless Base". This rule allows you to get entity_secured_pace_nun_box_9. Box comes from multiplying what we have with box and the 9 comes from adding 3+6+0. Since a logical fire is present in this equation, you burn the letters in "two three" that have no protection, these letters are t,w,t,h, and r. Next, you can take cohedron that sounds like couldron and brew yourself an akward potion with the tri sided isosceles. The diameter can be seen as a round up rule that allows you to regroup the answer you have so far. The "by the three by four" can easily be translate from the "Baseless Base Rule Compilation" giving you divided by 3 and divided by 4. That is why the answer is divided by 2 plus one entity_secured_pace_nun_box 9 divided by oee burned akward potion tri tour all around divided by 3 divided by 4. No need to thank me.

PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (67pts)

Answers

Answer:

a toy car was on the floor in the play room until the child applied force by starting to race with it. it accelerated and proceeded to move at 5m/s east. it came to a stop when the bedpost applied force to it.

what happens to balloon filled with air when it goes very high attitude from surface of earth why​

Answers

Answer:

The balloon will continue to expand and eventually burst.

Explanation:

Simply, the reason for this is because the density of the atmosphere decreases gradually as you increase in altitude closer to space. This means that the air on the outside of the balloon can't provide enough pressure over the surface of the balloon in order to counteract the gas on the inside of the balloon from expanding.

How much work does a student (m = 60 kg) do when he Climb a tower 80 m high?

Answers

Answer:

W = 47040  J

Explanation:

Given that,

The mass of a student, m = 60 kg

Height of the tower, h = 80 m

We need to find the work done in climbing the tower. The work done is given by :

W = mgh

So,

W = 60 × 9.8 × 80

W = 47040  J

So, the required work done is 47040  J.

Will an objects mass affect the kinetic energy? (If then because answer)

Answers

Answer: Mass and kinetic energy have a positive relationship, which means that as mass increases, kinetic energy increases, if all other factors are held constant

Explanation:

Yes, mass affects the kinetic energy due to their positive relationship.
The formula for kinetic energy is
K = 1/2 x Mass x Velocity^2

So if the mass changed then the kinetic will change

which of the following is the equation to determine current using resistance and voltage?

1) current = voltage + resistance
2) current = voltage × resistance
3) current = voltage - resistance
4) current = voltage / resistance

​Does anyone know?

Answers

Answer:

Current =voltage /resistance.

what is the definition of the word amplitude

Answers

Explanation:

Amplitude, in physics, the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position. It is equal to one-half the length of the vibration path. ... Waves are generated by vibrating sources, their amplitude being proportional to the amplitude of the source.

What inference can be drawn from the following evidence? Specific atoms of carbon from a dead animal can be traced to the leaves of a living plant.
A. Carbon exists only in animals
B. Carbon is moved throughout many different objects, but the total amount of carbon doesn’t change.
C. The animal must be eating the plant for food
D. Carbon is found more in plants than it is in animals.

Answers

Answer:

C

Explanation: Trust

During spring semester at MIT, residents of the parallel buildings of the East Campus dorms battle one another with large catapults that are made with surgical hose mounted on a window frame. A balloon filled with dyed water is placed in a pouch attached to the hose, which is then stretched through the width of the room. Assume that the stretching of the hose obeys Hooke's law with a spring constant of 88.0 N/m. If the hose is stretched by 4.20 m and then released, how much work does the force from the hose do on the balloon in the pouch by the time the hose reaches its relaxed length

Answers

Answer:

The work done on the hose by the time the hose reaches its relaxed length is 776.16 Joules

Explanation:

The given spring constant of the of the spring, k = 88.0 N/m

The length by which the hose is stretched, x = 4.20 m

For the hose that obeys Hooke's law, and the principle of conservation of energy, the work done by the force from the hose is equal to the potential energy given to the hose

The elastic potential energy, P.E., of a compressed spring is given as follows;

P.E. = 1/2·k·x²

∴ The potential energy given to hose, P.E. = 1/2 × 88.0 N/m × (4.20 m)²

1/2 × 88.0 N/m × (4.20 m)² = 776.16 J

The work done on the hose = The potential energy given to hose, P.E. = 776.16 J

Explain the relationship between magnetic fields and magnetic force.

Answers

Answer:

Magnetic field is the strength of magnetism created by a magnet, whereas the magnetic force is the force due to two magnetic objects. The concepts of magnetic field and magnetic force are widely used in fields such as classical mechanics, electromagnetic theory, field theory and various other applications.

Explanation:

Help help please and you will get the brainlist

Answers

Explanation:

5, w=f×s and s=w/f

=200÷40=5m

Q5 w=Fs
=450 *2
=900Nm
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