Which magnets need electric current for magnetism?
a. Bar magnets b. Temporary magnets c. Permanent magnets magnets

Answers

Answer 1
Probably temporary magnets, but I’m. It sure
Answer 2

Temporary magnets require electric current to produce magnetism and magnetic field lines B) Temporary magnets

In electromagnets, their magnetism is dependent on electricity  with an iron core in the center. If we add an iron core to a solenoid, we can increase its magnetic field strength . When we connect  a battery to a solenoid and wrap the sanded copper wire around a nail, a magnetic field is created. This force is generated by the magnetic field that's  created when current flows through the coil.

As long as there is a direct current running  through the coil, the nail will retain its magnetic properties. However, once the current stops, the magnetism of the nail is lost .  Creating electromagnets can be achieved by winding wire around the iron core.

The advantages of electromagnets are :

Electromagnets can be turned on and off magnetic Fields can be increased and decreased Electromagnets can be cheap compared to permanent magnets. The same cannot be said for a permanent magnet.

To learn more about Magnets

https://brainly.com/question/33942199


Related Questions

is a rare disorder that includes the inability to feel pain.
A. Somatoform pain disorder
B. Congenital analgesia
C. Kinesthesis
D. Anesthesia
Please select the best answer from the choices provided
Ο Ο Ο
B.
D

Answers

The rare disorder that includes the inability to feel pain is called Congenital analgesia. That is option B.

What is Congenital analgesia?

Congenital analgesia is defined as ,the name implies, a genetic disorder that rarely occurs which makes one not to be able to feel pain.

It is an autosomal recessive disorder in which there is genetic changes in the PMRD12 gene.

Therefore, the rare disorder that includes the inability to feel pain is called Congenital analgesia.

Learn more about pain here:

https://brainly.com/question/25753221

#SPJ1

In order to increase the final momentum of a golf ball, we could

a) follow through when hitting the ball
b) increase the force acting on it
c) increase the time of contact with the ball
d) swing as hard as possible
f) All of the above

Answers

Answer:

option f) all of the above

We will see that all of the given options would increase the momentum, so the correct option is f "all of the above"

How to increase the momentum?

Momentum is defined as the amount of motion, and it is given by:

P = m*v

Where m is the mass of the object and v is the velocity.

We can't change the mass of the golf ball, but we can change the velocity, and to do it, we need to increase the acceleration that we apply to the ball.

To increase the acceleration we can:

follow through when hitting the ball (the force is applied for more time, so the acceleration is larger).increase the force acting on it (it directly increases the acceleration).increase the time of contact with the ball (similar to the first option).swing as hard as possible (similar to the second option).

Then all the options are correct, which means that the correct option is f.

If you want to learn more about momentum:

https://brainly.com/question/7538238

#SPJ2

. Rohit had only one light source in his room. He was told by his friend that he can make the room more lighted by using mirror. What type of mirror can be used for the purpose?

Answers

Answer:

very smooth and polished glass mirror

Explanation:

The best type of mirror for this would be a very smooth and polished glass mirror. A metal mirror will also work but it would need to be extremely polished. This would allow light to efficiently be reflected across the room, thus effectively adding an "extra" light source to the room. If the mirror is not smooth then the light may become distorted and not reflect properly as it is supposed to. This may defeat the entire purpose of the mirror for this scenario.

AFTER a ringing tuning fork passes very quickly in front of a stationary observer...
a) The sound waves are equally spaced out
b) The sound has a lower pitch
c) The sound waves have equal amplitudes
d) all could apply

Answers

According to the Doppler effect page I just read it should be D

A car manufacturer wants to change its car’s design to increase the car’s acceleration. Which changes should the engineers consider making to the design? increase the force that the engine provides decrease the force that the engine provides increase the mass of the car decrease the mass of the car increase the top velocity the car can travel decrease the top velocity the car can travel

Answers

Answer:

I. increase the force that the engine provides.

II. decrease the mass of the car

Explanation:

Newton's Second Law of Motion states that the acceleration of a physical object is directly proportional to the net force acting on the physical object and inversely proportional to its mass.

Mathematically, it is given by the formula;

Force = mass * acceleration

[tex] Acceleration = \frac {Force}{mass} [/tex]

In this scenario, a car manufacturer wants to change its car’s design to increase the car’s acceleration. Thus, the changes the engineers should consider making to the design is to increase the force that the engine provides and decrease the mass of the car.

Answers:

increase the force that the engine providesdecrease the mass of the carincrease the top velocity the car can travel

These are the reactant in a chemical equation: 6 CO2 + 6 H2O --> C6H12O6 + 6 O2

Answers

Answer:

Carbon Dioxide and Water.

Explanation:

This is the chemical formula for photosynthesis!

PLS HELPPP!! ITS DUE TODAY!
I will make brainliest!
Answer the following question:

Which process is an example of a physical change?

a. carrots are cut into small pieces and mixed into a salad
b. a peanut butter sandwich is eaten and broken down by enzymes in the stomach
c. sodium metal and chlorine gas are combined to form a sodium chloride, or table salt
d. sodium metal and water are combined to form a basic compound and a flammable gas

Answers

A is an example of physical change

A box of mass 5.0 kg is initially at rest. A 500 N force causes it to move horizontally through a
distance of 12.00 m. How much work would there be?

Answers

Answer:

Workdone = 6000Nm

Explanation:

Given the following data;

Mass = 5kg

Force = 500N

Distance = 12m

To find the work done;

Workdone = force * distance

Workdone = 500 * 12

Workdone = 6000Nm

What is the main force that must be overcome in order to push an object
along a horizontal surface?

Answers

Answer: Friction

Explanation:

Friction and the normal force would be the two initial forces to overcome.

Answer: Friction

Explanation: The object must be pushed along which will create friction which nmust be overcome.

A body vibrates 100 times in 20 seconds. Find its frequency and time period.
plz answer this its urgent

Answers

Answer:

Vibrates 5 times  a / every second

Explanation:

A washing machine spin dries clothes. It starts spinning at 20 rad/s and slows down to 8 rad/s while turning through 500 revolutions.
a. What is the angular acceleration?
b. How much time does it take to slow down?

Answers

Answer:

i do not know man

Explanation:

lol

The angular acceleration of the washing machine spin is 53.5 x 10⁻³.

What is meant by angular acceleration ?

Angular acceleration is defined as the time rate of change of angular velocity in a circular motion.

Here,

Initial angular velocity, ω₁ = 20 rad/s

Final angular velocity, ω₂ = 8 rad/s

Angular displacement, θ = 2[tex]\pi[/tex] x no. of revolutions

θ = 2[tex]\pi[/tex] x 500 = 1000[tex]\pi[/tex]

a) Using the equation of circular motion,

ω₂² - ω₁² = 2αθ

Therefore, the angular acceleration,

α = (ω₂² - ω₁²)/2θ

α = (20² - 8²)/2 x 1000[tex]\pi[/tex]

α = 53.5 x 10⁻³ rad/s²

b) Time taken by the machine spin to slow down,

t = (ω₂ - ω₁)/α

t = (20 - 8)/53.5 x 10⁻³

t = 224.2 s

Hence,

a) The angular acceleration of the washing machine spin is 53.5 x 10⁻³.

b) Time taken by the washing machine spin to slow down is 224.2 s.

To learn more about angular acceleration, click:

https://brainly.com/question/30237820

#SPJ3

Use the following information about Earth and its moon to determine the distance between them. Earth's mass = 6.0 x 1024 kg Moon's tangential speed = 1,025 m/s Earth's radius = 6.4 x 10 m Moon's mass = 7.3 X 1022 kg 4.6 x 106 m O 3.8 x 108 m O 3.9 x 1011 m​

Answers

Answer:

3.8 × 108 m

Explanation:

Use formula: v^2 = G x m central / r

G = 6.77 e-11

Also, it was right on Edge.

Good luck!

The distance between Earth and its moon is 3.8×10⁸ m.

What is centripetal force?

A force that causes a body to follow a curved path is known as a centripetal force. It always moves in a direction that is the opposite of the body's velocity and in the direction of the immediate center of curvature of the path.

It is "a force by which bodies are dragged or driven, or in any manner tend, towards a point as to a center," according to Isaac Newton.

Given parameters:

Mass of the Earth: M = 6.0 × 10²⁴ kg.

Mass of the moon: m = 7.3 × 10²² kg.

Moon's tangential speed: v = 1,025 m/s

Let the distance between the center of Earth and the moon is r.

Hence,

GMm/r² = mv²/r

r = GM/v²

= 6.7 × 10 ⁻¹¹ × 6.0 × 10²⁴ / (1,025)²

= 3.82×10⁸ m.

Hence, by subtracting Earth's radius = 6.4 x 10⁶ m, we get, the distance between Earth and its moon is 3.8×10⁸ m.

Learn more about centripetal force here:

https://brainly.com/question/11324711

#SPJ2

Think of one obstacle that you know YOU CAN, YOU WILL, & YOU MUST overcome.

Answers

Answer:

myself tbh

Explanation:

hope this helps

Answer: Depression and myself, love life

Hope this helps have a awesome day❤️✨

Explanation:

1) A 2.5 kg ball strikes a wall with a velocity of 8.5 m/s to the left. The ball bounces off with a
velocity of 7.5 m/s to the right. If the ball is in contact with the wall for 0.25 s, what is the
constant force exerted on the ball by the wall?

Answers

Answer:

Force = -10 Newton.

Explanation:

Given the following data;

Initial velocity = 8.5m/s

Final velocity = 7.5m/s

Time = 0.25 seconds

Mass = 2.5kg

To find the force exerted;

First of all, we would determine the acceleration of the ball;

Acceleration = (v - u)/t

Acceleration =(7.5 - 8.5)/0.25

Acceleration = -1/0.25

Acceleration = -4 m/s²

Now, to find the force exerted;

Force = mass * acceleration

Force = 2.5 * -4

Force = -10 Newton

Note: The force is negative because it is an opposite reaction.

Why sound waves are called mechanical waves ​

Answers

Answer:

Because they travel by interacting within other particles.  

Explanation:

Sound cannot travel in a vacuum, sound waves need to interact with other particles in order to be carried and this makes sound waves a mechanical wave.

Why would you consider Joule’s early experiments with electric motors important even though he did not
achieve his goal?

Answers

Answer:

It counts as a learning experience

Explanation:

He can learn from his mistakes and take important steps to achieve his goal In the future.

Setting objectives can lead to better direction, enhanced attention, higher levels of motivation, and increased productivity. You may change your behaviours, mindset, confidence, and daily activities by setting clear, measurable goals.

What important even though achieve his goal?

More essential than monetary or material rewards is achievement. Greater personal satisfaction comes from completing the task or reaching the goal than from being praised or recognized.

Additionally, crucial is commitment. It is less probable that you will succeed if you don't give your aim your all. This enables you to change your future expectations and strategy.Feedback enables you to discover your strengths and weaknesses.

Therefore, people who are driven by achievement are always looking for methods to do things better.

Learn more about goal here:

https://brainly.com/question/470262

#SPJ2

Empujamos un baúl 3 metros, para ello aplicamos una fuerza de 200 Newton. ¿Cuál es el trabajo realizado?

Answers

Answer:

Trabajo realizado = 600 Nm

Explanation:

Dados los siguientes datos;

Fuerza = 200 Newton

Distancia = 3 metros

Para encontrar el trabajo realizado; Trabajo realizado = fuerza * distancia

Sustituyendo en la ecuación, tenemos; Trabajo realizado = 200 * 3

Trabajo realizado = 600 Nm

Explain why a charged body loses its charge if we touch it with our hand?

if u answer me I can give u brainliest ☺️​

Answers

Answer:

Explanation: A charged body loses its charge when we touch it with our hand because some of the charge flows through our body to the ground earthing. As a result the charge on the body decreases every time we touch it. This is because of earthing.

Explanation:

yw .

Explanation:

When we touch a charged body, it loses its charge, due to the process of earthing. Our body is a good conductor of electricity. It transfers the charges to the earth

A mass sitting on a horizontal, frictional surface is attached to one end of a spring; the other end is fixed to a wall. 3.0 J of
work is required to compress the spring by 0.20 m. If the mass is released from rest with the spring compressed, it
compresses a maximum acceleration of 15 m/s?.

a) Determine the spring constant.
b) Determine the mass.
d) What is the velocity when the mass reaches maximum acceleration?
c) Deterinine the net force when the mass passes 0.10m compression
d) Determine the acceleration when the mass passes 0.10m compression.
e) Determine the velocity when the mass passes 0.10m compression

Answers

Answer:

I started answering this before everything was erases, but briefly

W = 1/2 K x^2     so K = 2 W / x^2 = 6 * 25 = 150

Also F = - K X = 150 * 1/5 = 30 N at max extension

m = F / a = 30 /15 = 2 kg

Since max extension occurs at t = 0 you can write

x = A sin ω t

v = ω A cos ω t

a = -ω^2 A sin ω t            note that there is no phase angle here

Also at .1 compression

.1 = .2 sin ω t     and sin ω t = 1/2    and ω t = 30 deg = pi / 6

Substiture these values above to get velocity and acceleration when

ω t = 30 deg

Five independent measurements are made of the diameter of a cylinder. Results, in mm, are: 21.8; 21.6; 22.1; 21.9; 22.1. What should be the reported value of the cylinder's diameter?

Answers

Answer: 21.9 mm

Explanation:

Given that five independent measurements are made of the diameter of a cylinder. Results, in mm, are: 21.8; 21.6; 22.1; 21.9; 22.1. What should be the reported value of the cylinder's diameter?

The measurement of the diameter of cylinder is measured several time in order to reduce the uncertainty called random error.

The reported value of the cylinder's diameter should be the average or the mean value of the whole measurement.

That is

Mean = (21.8 + 21.6 + 22.1 + 21.9 + 22.1) ÷ 5

Mean = 109.5 ÷ 5

Mean = 21.9 mm

Therefore, the reported value of the cylinder diameter will be 21.9 mm

How are clouds related to water vapor and water droplets?


A.Water vapor in the air condenses to form tiny water droplets, and these water droplets make up clouds.

B.Water vapor in the air makes up clouds, but water vapor does not condense to form tiny water droplets that make up clouds.

C.Water vapor in the air condenses to form tiny water droplets, but the water vapor and water droplets do not make up clouds.

D.Water vapor in the air stays in the air as water vapor. The water vapor does not make up clouds, and it does not condense to form tiny water droplets.

Answers

Answer:

A!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Objects that are able to roll have what type of energy?

A. potential
B. mechanical
C. thermal
D. chemical

Answers

A because of the object isn’t rolling yet and it’s circular then it has the potential to roll

pulling a 15 kg mass from a bucket from a depth of 6 meters well a man shook 20 sec what was his power

Answers

Answer:

power=44.1 watts

Hope it helped

PLS mark BRAINLIEST

HELP PLEASE

44. Two wave pulses are traveling along a string
toward each other as represented in the diagram
below.

(D is interference)

Answers

The phenomenon of interference occurs when two wave pulses are traveling along a string toward each other. Option D is correct.

What is the interference of waves?

The result of two or more wave trains flowing in opposite directions on a crossing or coinciding pathways. This phenomenon is known as the interference of waves.

The effect is the sum of the individual wave amplitudes at each site where more than one wave is present.

When two wave pulses are traveling along a string toward each other. They meet and the phenomenon is occur known as interference.

Hence the phenomenon of interference occurs when two wave pulses are traveling along a string toward each other.

To learn more about the interference of waves refer to the link;

https://brainly.com/question/16098226

is there a gravitational force of attraction between your phone and the earth?

Answers

Yes. When you let go of your phone it will fall to the earth because of Gravitational pull. If it did not exist the phone would float like in space

A 55 kg boy is riding a skateboard at a speed of 1.0 m/s. What is his
kinetic energy?

Answers

Answer:

27.5

Explanation:

KE=1/2m(v)^2

14. Saeed is pulling a 6 kg heavy rock with an upward force of 40 N but does not succeed to lift it up. What is the magnitude of the normal force on the rock?

Answers

Answer:

58.8 N

Explanation:

The normal force is calculated as equal to the perpendicular component of the gravitational force.

Thus; N = mg

We are given m = 6 kg

Thus;

N = 6 × 9.8

N = 58.8 N

Thus, magnitude of normal force on the rock = 58.8 N

Which of the following describes a change in energy that occurs as an acorn falls from a tree toward the ground

Answers

the last one which is D

As an acorn falls from a tree toward the ground, gravitational potential energy is converted into kinetic energy.

To find the correct option among all the options, we need to know about the conversation of energy.

How are the gravitational potential energy and kinetic energy defined near the earth surface?Near the earth surface, the gravitational potential energy is given as mass×g×height from the earth surface.Kinetic energy is given as 1/2×mass×velocity².How are the gravitational potential energy and kinetic energy converted when acorn falls from a tree?When an acorn is going to fall, it is at maximum height of its journey, so it has maximum gravitational potential energy.Also, at that time, its kinetic energy is zero as it's at rest.But when it moves down, its potential energy decreases as the height decreases and kinetic energy increases due to increasing velocity. So that its total mechanical energy is conserved.

Thus, we can conclude that option (d) is correct.

Learn more about the conversation of gravitational potential energy to kinetic energy here:

brainly.com/question/11333389

#SPJ2

the driver of the bus brought the students to the playground and returned to the garage on the same road when the bus engine was doing more work: A when the students were driving: B when they returned to the garage, explain why

Answers

Answer: A driver must not drive a vehicle at such a slow speed ... When driving under adverse weather, road or traffic ... before the school bus stops to pick up or let off students

Explanation:

hope this helps :)

The graph shows the amplitude of a passing wave over time in seconds (s) What is the approximate frequency of the wave shown? A. 6 Hz B. 0.2 0.4 Hz

Answers

Answer:

0.2 I took the test

Explanation:

I took the test

The time period of the whole wave cycle is 6 seconds but the time period of one complete wave is about 4 seconds here. The inverse of this time period is the frequency, that is 0.2 Hz.

What is frequency ?

Frequency by definition is the number of events per unit time. Frequency of a wave is the number of wave cycles in one second. It is the inverse of the time period.

Frequency is directly related to the energy of the wave. As the frequency increases, energy of the wave also increases. In the given graph the wave cycle is given for a time of 6 seconds.

The time period for one complete wave  is 4 second from the graph.

thus, T = 4 s

v =  1/T

  = 1/4 = 0.2 s⁻¹ or 0.2 Hz  

Therefore, the frequency of the wave shown, is 0.2 Hz.

Find more on frequency:

https://brainly.com/question/14316711

#SPJ5

Other Questions
Part A: What is the approximate y-intercept of the line of best fit and what does it represent? (5 points) Part B: Write the equation for the line of best fit in the slope-intercept form and use it to predict the number of matches that could be won after 13 months of practice. Show your work and include the points used to calculate the slope The real payoff of driving forces is to help managers understand: A. the extent to which rivals have more than two competitively valuable competencies or capabilities. B. what strategy changes are needed to prepare for the impacts of those driving forces. C. the overall strength of the five competitive forces model versus a strategic group map. D. whether the industry's strategic group map will be static or dynamic. E. what conditions exist in the economy at large. Which is the expanded form of 567,000,200?OA) 500,000,000 + 60,000,000 + 7,000,000 + 200OB) Five hundred sixty-seven million, two hundredsOC) 567,000 + 200OD) 567 + 200 In which choice is y a nonlinear function of x? Geologic and fossil evidence suggests that all landmasses were once connected in a supercontinent named PangaeaWhat geologic phenomenon can exp the change from Pangaea to the current arrangement of continents?A. Changes in tectonic plate positionsB. Changes in volcanic activity in the oceansC. Changes in rock weathering and soil erosionD. Changes in oceanic currents and temperatures Connie has to solve the following problem. 5 boxes of cereal costs $12.50. How much will 18 boxes cost. Choose EVERY proportion Connie could use to solve this problem. - 12.5/5 = 18/x- 5/12.5 = 18/x- 5/12.5 = x/18- 5/18 =12.50/x What is the answer for m/1 = What is the percent composition of a 16.75 g sample of a compound containing 14.02 g oxygen and 2.73 g hydrogen? Select the correct answer below: 83.7% oxygen, 16.3% hydrogen O 17% oxygen, 13% hydrogen O 68.2% oxygen, 31.8% hydrogen 89.5% oxygen, 10.5% hydrogen Can someone help me with 6? What are the advantages and disadvantages of the serial dilution-agar plate procedure? The beta phase occurs when (6 points)Group of answer choicesyour brain is completely shut downyour brain is multitaskingyour brain is sleepingyour brain is reading and learning What % of $7,000 = $1,750 450 is invested at 3% simple interest.How much interest will be earned in 4 years? Read this excerpt from The Myth of Hercules.Hercules was the son of the great god Zeus and a human woman named Alcmene. The goddess Hera did not like Alcmene and vowed to destroy Hercules when he was born. Hera sent two snakes to kill the baby as he lay in his crib, but Hercules was strong and strangled the snakes with his tiny hands before they could bite him with their sharp fangs.The excerpt gives clues that later in the story, Hercules will most likelyprove that he does not have heroic traits. seek revenge against the goddess Hera. make peace with the goddess Hera. show strength when facing obstacles. Mark this and return Suppose that in a certain country, 10% of the elderly people have diabetes (call this Event D). It is also known that 30% of the elderly people are living below poverty level (call this Event P), 35% of the elderly population falls into at least one of these categories, and 5% of the elderly population falls into both of these categories. If a randomly selected elderly person is living below the poverty level, what is the probability that she/he has diabetes can you make a triangle with 5cm, 8cm, 15cm 3-1/6 please help me I dont feel like doing the math Can someone write all these topics as a thesis statement please???? Me not being a complete id.iot- Please..!!!!!Help!!!!!!! Please!! Help!!!!