explain why magnets have poles​

Answers

Answer 1

Answer: The force of a magnetic field on a particle with spin causes the particle to rotate it's spin to align with the magnetic field. ... Taking these two ideas together, then, the Earth's magnetic field will cause the magnet to align north to south. That's why people named them the north and south poles.

Explanation: Hope i could help please mark as brainliest!


Related Questions

A right triangle with base labeled Vector J = 6, the height labeled Vector K = unknown and the hypotenuse labeled Vector L = 10 meters. What is the magnitude of vector K

Answers

Answer:

K = 8

Explanation:

The magnitude of k can be found using Pythagoras theorem.

Given hypotenuse L = 10

J = 6

K = ?

L^2 = J^2 + k^2

Therefore

10^2 = 6^2 + k^2

10 x 10 = 6 x 6 c k^2

100 = 36 + k^2

Subtract 36 from both sides

100 - 36 = 36 - 36 + k^2

64 = k^2

K^2 = 64

K = squared root of 64

K = 8

what is quantum programing

Answers

Answer: Quantum programming is the process of assembling sequences of instructions, called quantum programs, that are capable of running on a quantum computer. Quantum programming languages help express quantum algorithms using high-level constructs.

Explanation:

Final answer:

Quantum programming involves creating algorithms and software for quantum computers, utilizing qubits and principles like superposition and entanglement. It requires knowledge of quantum mechanics and is supported by programming languages like Q# and Qiskit.

Explanation:

Quantum Programming

Quantum programming is a field within computer science that focuses on the development of algorithms and software for quantum computers. These computers leverage the principles of quantum mechanics to process information in ways that traditional computers cannot. Quantum programming often involves the use of quantum bits or qubits, which, unlike classical bits, can exist in multiple states simultaneously. This state is known as superposition, and it allows quantum computers to perform certain computations much faster than classical computers. Another key concept in quantum computing is entanglement, which enables qubits that are entangled to be correlated with one another even when separated by large distances.

Quantum programming languages, such as Q# by Microsoft and Qiskit by IBM, provide frameworks for developers to write programs that can run on quantum computers. The field is highly interdisciplinary, drawing from areas such as physics, mathematics, and computer science.

When it is cloudy, many of the sun’s rays never reach the Earth. What does this do to the temperature

Answers

Answer:

When it is cloudy, many of the sun’s rays never reach the Earth. It leads to cooler temperatures.

Explanation:

During the day, the sun warms the earth. When the sky is clear, more heat reaches the earth's surface . This leads to warmer temperatures.

However, when the sky is cloudy, a few drops of clouds reflect some of the sun's rays. As a result, less solar energy can reach Earth's surface, causing Earth to heat up more slowly. This leads to cooler temperatures.

If cloudy skies are forecast when forecasting daytime temperatures, expect lower temperatures than you would expect if clear skies were forecast.

Similarly, cloud cover at night has the opposite effect. When the sky is clear, the heat emitted from the earth's surface freely escapes into space, resulting in cooler temperatures.

However, when there are clouds, some of the heat from the earth's surface is captured by the clouds and returned to the earth. As a result, temperatures drop more slowly than when the sky is clear.

Final answer:

Cloud cover influences Earth's temperatures, with thick clouds leading to cooler days by blocking sunlight and warmer nights by trapping heat. Low clouds primarily cool the Earth while high clouds can contribute to warming due to trapping of infrared radiation. This results in different temperature outcomes depending on cloud type and time of day.

Explanation:

When it is cloudy, many of the sun’s rays are either reflected or absorbed by clouds, which can significantly influence temperature conditions on Earth. During the day, thick clouds can prevent the sun's energy from warming the Earth's surface as effectively, leading to cooler daytime temperatures. Conversely, at night, these same clouds can act as an insulating layer, trapping longwave radiation that is emitted from the Earth's surface and preventing it from escaping into space, resulting in warmer nighttime temperatures.

Furthermore, cloud cover affects the radiation balance of Earth differently based on the type of clouds. Low clouds generally have a net cooling effect since they reflect more sunlight back into space. On the other hand, high cirrus clouds tend to have a net warming effect by trapping more infrared radiation. This dynamic leads to a complicated system of cloud feedbacks that influence global temperature patterns.

In summary, clouds play a critical role in the Earth's climate system by influencing how much of the sun's energy is absorbed or reflected, and how much earthly heat is retained or released, thereby affecting the overall temperature experienced at Earth's surface.

please help!!!!!!! (attached to the file)

Answers

Answer:

B

Explanation:

the battery isn't chemical energy so any answer saying that you can cross out and that leaves you with B

PNEWTON
What is the ist law of motion?

Answers

Answer:

Newton's First Law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. It may be seen as a statement about inertia, that objects will remain in their state of motion unless a force acts to change the motion.

Explanation:

mark brainliest answer please

without fluid friction, all objects accelerate at?

Answers

Answer:

Acceleration of gravity=[tex]9.8m/s/s[/tex]

Explanation:

Newton's Second Law-acceleration is proportional to the net force acting on an object.

All objects usually free fall at the same acceleration of [tex]9.8m/s/s[/tex]-this regardless of their mass. This acceleration is known as acceleration of gravity.

A missile is moving 1350 m/s at a 25.0 degree angle. It needs to hit a target 23500 m away in a 55.0 degree direction in 10.20s. What is the direction of its final velocity?

Answers

Answer:

V=[tex]3204m/s[/tex]

Direction is normal to the incline

Explanation:

This question tests on projectile motion.

First, calculate the acceleration of the missile.

Incline=55º,Distance=23500m, t=10seconds.

Horizontal motion of projectile

[tex]x=V_xt+0.5a_xt\\23000Cos55\textdegree=1350Cos25\textdegree\times10.20+0.5a_x(10.20)^2\\a_x=19.2m/s^2[/tex]

Final velocity

[tex](V_x)\prime=V_x+a_xt=1350Cos25\textdegree+19.2\times10.20=1419m/s[/tex]

The vertical motion of the missile can be calculated as:

[tex]23500 Sin55.0\textdegree =1350Sin25\textdegree\times10.2+0.5a_y\times10.2^2\\a_y=258.2m/s^2[/tex]

Final Velocity is:

[tex](V_y)\prime=V_y+a_yt=1350Sin25\textdegree+258.2\times10.20=3204m/s[/tex]

Combining both we get

[tex]V=\sqrt(V\prime x^2+V\primey^2)=3504.2m/s[/tex]

*Misile's motion is normal to the 55º incline.

An Inter City Express train traveling at 250 km/h is
braked to a stop in a distance of 4820 m. If the mass of the
train is 8.63 X 105 kg, what is the average braking force?

Answers

Answer:

F = 431671.31 [N]

Explanation:

This problem can be solved using the work and energy theorem, which tells us that the initial mechanical energy (potential energy + kinetic energy) plus the sum of the work from the initial position to the end will be equal to the final mechanical energy.

[tex]E_{M1}+W_{1-2}=E_{M2}\\0.5*m*v_{1}^{2}+W_{1-2}=0.5*m*v_{2}^{2}[/tex]

As the train stops at the end, the speed at Point 2 is equal to zero,so we can determine the work, we first convert the speed from [km/h] to meters per second.

[tex]250[\frac{km}{h}]*1[\frac{h}{3600s} ]*1000[\frac{m}{1km} ]\\= 69.44[\frac{m}{s} ][/tex]

[tex]0.5*(8.63*10^{5})*(69.44)^{2}+W_{1-2}= 0.5*(8.63*10^{5})*(0)^{2}\\W_{1-2}=-2080.66*10^6[J][/tex]

The negative sign means that the work is done in the opposite direction to the movement.

Knowing the work we can calculate the force, since an initial input data is the distance

W = F * d

F = W / d

F = (2080.66*10^6) / 4820

F = 431671.31 [N]

2. A 4-kg gun shoots a 0.1-kg bullet at 400 m/s. Find the recoil speed of the gun.

Answers

Answer:10m/s

Explanation:

M=mass of gun=4kg

U=recoil velocity of gun

m=mass of bullet=0.1kg

V=velocity of bullet=400m/s

M x U=m x V

4 x U=0.1 x 400

4xU=40

Divide both sides by 4

(4xU)/4=40/4

U=10m/s

Recoil velocity=10m/s

Which of these is not a part of the
cardiovascular system?

Answers

Answer:I don't see any

Explanation:

Answer: (B)  The pancreas is a part of the cardiovascular system. The heart and your circulatory system is a part of it (which includes blood and your veins/arteries).

Explanation:

Possible reasons why seascorpions went extinct

Answers

Sea scorpions or Eurypterids lived about 251.9 million years ago. They were formidable predators and hunters, but they were wiped out in the Great Permian Mass Extinction, which is also known as the Great Dying (96% of all species on Earth went extinct).The largest species like Jaekelopterus was over 7 feet long! They were mainly thought to go extinct because of a slew of natural disasters that occurred when a comet hit the Earth, as well as increased volcanic activity polluting the seas that Sea scorpions lived in, as well as rising sea temperatures. The Silurian, when these Sea scorpions proliferated was when the water was cooler, holding in more nutrients, allowing both Sea Scorpions and other animals to spread all over the world. But as the oceans became polluted from the volcanoes (and the ash they produced) and the global ocean temperatures began to rise, many animals may not have been able to cope or adapt to the extreme change, becoming helpless in their nutrient deficient water (compared to what they were used to).

I hope this helps!

A box sliding down a hill going 3m/s accelerates at 2m/s2. How fast is going after 4 seconds.

Answers

Answer: the speed after 4seconds is 11m/s

Explanation:

Every object with mass exerts a gravitational force on every other object with mass. The gravitational force between which of the
following two objects would be easiest to detect with measuring equipment?
A.
an electron and a bowling ball
OB. the Moon and the Earth
C.
a baseball and a bowling ball
D.
a human and a dog

Answers

OB or B is the answer

A man pushes a cart with force of 120-N at an angle of 50 degrees with the ground. If he walks a horizontal displacement of 20-m going to cashier who’s much work is done!

Answers

Answer:

1543 J

Explanation:

The work done by a force when moving an object is given by the equation:

[tex]W=Fd cos \theta[/tex]

where:

F is the magnitude of the force applied on the object

d is the displacement of the object

[tex]\theta[/tex] is the angle between the direction of the force and of the displacement

For the  cart pushed in this problem, we have:

[tex]F=120 N[/tex] is the force applied by the man

[tex]d=20 m[/tex] is the displacement of the cart

[tex]\theta=50^{\circ}[/tex] is the angle between the directions of the force and of the displacement

Solving for W, we find the work:

[tex]W=(120)(20)(cos 50^{\circ})=1543 J[/tex]

in addition to power output light bulbs should also be labelled with the rate at which they emit visible light ​

Answers

Final answer:

To compare the brightness of light bulbs, you should look for the luminous flux in lumens on their labels, as this measures the perceived power of light by the human eye, offering a more accurate representation of brightness than wattage alone.

Explanation:

To compare the brightness of light bulbs for sale in a store, you should look on the labels to see how they are rated in terms of luminous flux, which is measured in lumens (lm). The luminous flux is a measure of the perceived power of light by the human eye. Energy-saving light bulbs like compact fluorescent lamps and LED bulbs provide more luminous flux for a given use of electricity, meaning they have higher luminous efficacy, represented in lumens per watt. When replacing an old incandescent bulb with an energy-saving one, it is important to compare lumens to ensure the same level of brightness is achieved.

Traditionally, people have been accustomed to associating the brightness of a bulb with its power consumption in watts due to the prevalence of incandescent bulbs. However, as technology has advanced, the importance of comparing lumens, rather than just wattage, has become clear for a more accurate representation of a bulb's light intensity. A higher wattage does not necessarily mean more visible light, since not all electrical power is converted into visible light. Also, different types of bulbs convert electricity to light with varying efficiencies.

Note: The efficiency of a light bulb, which is the fraction of its total light output that falls within the visible range, is never 100% due to the nature of thermal sources and the distribution of emitted wavelengths.

Learn more about luminous flux here:

https://brainly.com/question/31054405

#SPJ12

A balloon has a volume of 18.0-L at a pressure of 87.6 kPa. What will be the new volume when the pressure is 48.2 kPa?

Answers

Answer:

32.71 L

Explanation:

We can solve this question using Boyle's law of ideal gas. The law states that the volume and pressure are inversely proportional when the temperature is constant. At first, the volume is 18L (V1) and the pressure is 87.6 kPa(P1). Then the pressure changed into 48.2 kPa(P2). We are asked to find the volume(V2).

The calculation will be:

P1 * V1= P2 * V2

87.6 kPa  *18L = 48.2 kPa * V2

V2=  87.6 kPa  *18L / 48.2 kPa

V2=32.71 L

What is the charge on an object that has 1.09x10^13 excess electrons?

Answers

Answer:

[tex]-1.74\cdot 10^{-6} C[/tex]

Explanation:

The electron is the particle that rotates around the nucleus of the atom; it has a negative electric charge equal to :

[tex]e=-1.6\cdot 10^{-19}C[/tex]

which is known as fundamental charge.

For an object containing N excess electrons, the total charge of the object is

[tex]Q=Ne[/tex]

In this problem, the number of excess electrons in the object is:

[tex]N=1.09\cdot 10^{13}[/tex]

Therefore, by plugging it the numbers, we can find the value of Q, the total charge of the object:

[tex]Q=(1.09\cdot 10^{13})(-1.6\cdot 10^{-19})=-1.74\cdot 10^{-6} C[/tex]


What is a mutation?​

Answers

Answer:

the changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations, caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes

Explanation:

Which phase of matter consists of particles that vibrate only?

Answers

Answer: Solids

Explanation: Solids have very little movement and the particles have barely enough movement to vibrate. We can't see it but the particles are indeed vibrating. Solids have the least amount of kinetic energy which is moving energy.

When you're asked to calculate moments and torque, what's the main difference in calculation? Also what is a couple?

Answers

Answer:

a) Explanation below. b) Explanation below

Explanation:

Torque is defined as the product of a force by a radius, while momentum is defined as the product of force by a distance. Mathematically we would have

T = F * r

M = F * d

where:

T = torque = [N*m]

M = moment = [N*m]

F = force =[N]

d = distance [m]

r = radius [m]

Although they have the same units, the difference between them is the application. For the case of torque this is always applied in parts that are in rotation, such as the shafts of cars, the shafts of pumps, torque in gears and etc. While the moment can be applied to a body without the need for it to rotate.

A couple, is as its name suggests a couple of forces of equal magnitude but opposite sense and do not share a line of action. A body under the action of a couple of forces tends to rotate the body without moving it from one point to another.

What is the value, in meters per second squared, of the acceleration of
gravity?

Answers

Answer:

9.80665 is the value in meters per second squared

without fluid friction, all objects accelerate at?

Answers

Answer:

Without fluid friction, all objects accelerate at the gravity acceleration.

Explanation:

When an object moves through a fluid, like air, water or oil, the object experiences a resistance to flow; this is, to pass through the fluid.

This resistance force is the fluid friction.

In few words, fluid friction is a force that opposes the motion of the objects through the fluid.

Then, in the abscence of fluid friction, all objects falling accelerate at the gravity acceleration.

If 600 J of work is done in 38, what is the power? ​

Answers

If 600 J of work is done in 38 hours, the power is 0.00439 watt.

what is the order of magnitude of the speed of light

Answers

Answer:

The order of magnitude of speed of light in S.i. units is 8. Therefore c=3×10^8 meter / second.

Explanation:

The body weighing 2 kg moves through the horizontal surface and crosses the path x = 75 cm The coefficient of friction of the body and horizontal surface is 0.8. If the kinetic energy of the body in the starting position is 16J, how much will the kinetic energy of the body be in the definitive position?

Answers

The kinetic energy of the body in definitive position is 4.24 J.

Explanation:

As per the work energy theorem, the work done on any system or object to move it from one position to another is equal to the change in kinetic energy of the object. In this case, the body weighing 2 kg is moved over an horizontal surface for a distance of 75 cm. As there will be frictional force acting on the body while moving over the surface. This frictional force multiplied by the distance the object is moved will give the work done on the body.

Frictional force = Coeffficent of friction × Normal force.

As the weight of the body is 2 kg, the normal force acting on it will be mass multiplied with acceleration due to gravity.

Frictional force = - 0.8×9.8 × 2 =-15.68 N

So the work done will be the product of frictional force with the displacement of 75 cm or 0.75 m.

Work done =  Frictional force × Displacement

Work done = -15.68×0.75 = -11.76 J.

So the work is done by the object.

If the kinetic energy of the body at starting is 16 J, then the kinetic energy of the body at definitive position will be obtained as below.

Work done = change in kinetic energy

-11.76 J = Final kinetic energy-16 J

Final Kinetic energy = - 11.76+16

Final kinetic energy = 4.24 J

Thus, the kinetic energy of the body in definitive position is 4.24 J.

What is the wavelength of a radio wave with a frequency of 2.00 x 10^4 Hz? (hint: what is the speed of all electromagnetic radiation?)
ОА
6.67 x 105 m
O
B
1.50 x 104 m
6.00 x 1012 m
6.67 x 10m

Answers

Answer: Option B

The wavelength for a radio wave with a frequency of  2 × 10⁴ Hz is

1.5 × 10⁴ m.

Explanation:

Wavelength is the measure of distance between two successive crests or troughs in a standing wave. Also wavelength can be measured as the ratio of velocity of light to frequency. It is like this because wavelength is inversely proportional to the frequency.

[tex]Wavelength =\frac{c}{frequency}[/tex]

As c = 3 × 10⁸ m/s and the frequency is 2 × 10⁴ Hz, then the wavelength will be

[tex]Wavelength =\frac{3*10^{8} }{2*10^{4} } =1.5*10^{4} m[/tex]

So, the wavelength for a radio wave with a frequency of  2 × 10⁴ Hz is

1.5 × 10⁴ m.

What is the kinetic energy of a 7.26kg bowling ball Thai is rolling at a speed of 2m/s

Answers

Answer:14.52joules

Explanation:

Mass(m)=7.26kg

Velocity(v)=2m/s

Kinetic energy=(mv^2)/2

Kinetic energy=(7.26x2^2)/2

Kinetic energy =(7.26x4)/2

Kinetic energy =29.04/2

Kinetic energy =14.52joules

How do electrons and protons differ in their electric charge?

Answers

Answer:opposite sign, but same magnitude

Explanation:

Electrons are negative and protons are positive

Check
Use the drop-down menus to choose the planets being described.
This planet had the Great Dark Spot.
This planet has the most visible rings.
This planet rotates from top to bottom.
This planet has the Great Red Spot.

Answers

Answer:

the first one is: Neptune

second one: Saturn

third one: Uranus

fourth one: Jupiter

Explanation:

The classification is as follows:

This planet had the Great Dark Spot - Neptune .This planet has the most visible rings - Saturn.This planet rotates from top to bottom - Uranus. This planet has the Great Red Spot - Jupiter.  

Learn more: https://brainly.com/question/537797?referrer=searchResults

the speed of the sound wave in the chosen m_____ should be known

Answers

Answer:

meters or meter...

Explanation:

....

Other Questions
the electrical current in a circuit is measured in which of the following units.volts resistance amperes pressure Suppose Dylan marries woman with type O blood. Is it possible for any of theirchildren to also here? Why or why not? C2 = 20.0 F, and C3 = 25.0 F. If no capacitor can withstand a potential difference of more than 100 V without failure, what are (a) the magnitude of the maximum potential difference that can exist between points A and B and (b) the maximum energy that can be stored in the three-capacitor arrangement? 2 A town park has two biking trails. Marsh Trail is 5 miles long, Woodland Trail is25 miles long. How much longer is Marsh Trail than Woodland Trail?A. 31c. 733D. 2 Which of the following statements is true? The value is a rational number. The number 0 is a natural number. The number is an integer. The number -5 is a real number.? collectively living organisms, air, water, and soil constitute the Samneric tell Ralph all of the following EXCEPT: Who where the leaders in Egypt and how would they lead ?? On April 1, 2018, On April 1, 2018, Shoemaker Corporation realizes that one of its main suppliers is having difficulty meeting delivery schedules, which is hurting Shoemaker's business. The supplier explains that it has a temporary lack of funds that is slowing its production cycle. Shoemaker agrees to lend $570,000 to its supplier using a 12-month, 11% note. Required: 1. The loan of $570,000 and acceptance of the note receivable on April 1, 2018. 2. The adjustment for accrued interest on December 31, 2018. 3. Cash collection of the note and interest on April 1, 2019. Record the above transactions for Shoemaker Corporation. (If no entry is required for a transaction/event, select "No journal entry required" in the first account field.)Shoemaker Corporation realizes that one of its main suppliers is having difficulty meeting delivery schedules, which is hurting Shoemaker's business. The supplier explains that it has a temporary lack of funds that is slowing its production cycle. Shoemaker agrees to lend $570,000 to its supplier using a 12-month, 11% note. Required: 1. The loan of $570,000 and acceptance of the note receivable on April 1, 2018. 2. The adjustment for accrued interest on December 31, 2018. 3. Cash collection of the note and interest on April 1, 2019. Record the above transactions for Shoemaker Corporation. (If no entry is required for a transaction/event, select "No journal entry required" in the first account field.) KNOWLEDGE CHECK!!!ALEKKSSSS When a 70 kg man sits on the stool, by what percent does the length of the legs decrease? Assume, for simplicity, that the stool's legs are vertical and that each bears the same load. Temperature-sensitive mutations are useful in understanding essential life processes. A temperature-sensitive mutant will be normal at a lower (non-restrictive) temperature; when shifted to a higher (restrictive) temperature, the mutant will reveal its mutant (and potentially deleterious) phenotype. You isolate a plant with a temperature-sensitive mutation in the water-splitting complex. You grow the plant at a non-restrictive temperature, then shift it to its restrictive temperature. The outcome you would most expect to see upon shifting temperature would be decreased NADPH production. increased NADPH production. no change in NADPH production. decreased sugar production. no change in sugar production. increased oxygen production. During the 1967 Six-Day War, Israel gained control of Egyptian and Syrian land. In the 1973 Yom Kippur War, Egypt tried to retake___and Syria tried to retake___, but Israel kept control of both territories. A dendritic or langerhans cell is a specialized ________. Can someone please help ! A web designer quits a project where she was paid $50,000 on completion of the project. She starts a new company with sales revenues of $550,000 last year, while spending $250,000 on compensation for employees (excluding herself), $70,000 on capital, and $30,000 on materials. What was the firms economic profit? Which European power controlled the mouth of the Mississippi River and closed it to American trade in the 1780s in the hope it would keep Americans from expanding westward? Past records indicate that the probability of online retail orders that turn out to be fraudulent is 0.08. Suppose that, on a given day, 20 online retail orders are placed. Assume that the number of online retail orders that turn out to be fraudulent is distributed as a binomial random variable. a. What are the mean and standard deviation of the number of online retail orders that turn out to be fraudulent? b. What is the probability that zero online retail orders will turn out to be fraudulent? c. What is the probability that one online retail order will turn out to be fraudulent? d. What is the probability that two or more online retail orders will turn out to be fraudulent? Emanuel is planting trees along a new city sidewalk. He plants the same number of trees on each city block. After 3 blocks, he has planted 15 trees. After 5 blocks, he has planted 25 trees. At what rate is Emanuel planting trees? The following transactions for the month of March have been journalized and posted to the proper accounts. Mar. 1 The business received $7,000 cash and issued common stock to stockholders. Mar. 2 Paid the first month's rent of $700. Mar. 3 Purchased equipment by paying $3,000 cash and executing a note payable for $8,000. Mar. 4 Purchased office supplies for $700 cash. Mar. 5 Billed a client for $10,000 of design services completed. Mar. 6 Received $7,800 on account for the services previously recorded What is the balance in Cash on March 6?