Answer:
I would say that your best answer would be C.
I'm not too sure about this, but it's the best answer on there
Explanation:
Hope this helps you.
C. They can be bonded together to create different substances.
Explanation:Elements are the simplest substances that can get without losing their properties. They can be found on the periodic table.
To help answer this question we can break down each answer choice.
Choice A
Answer A cannot be correct simply because of the definition of an element. A substance of a pure element cannot be broken down into any simpler substance. The only thing beyond an element is subatomic particles like protons and electrons, which are not considered substances. So elements are the simplest substances that exist.
Choice B
Many elements are found in nature. It would be impossible to live if elements were not naturally occurring. For example, oxygen is an element. Oxygen is found naturally in the atmosphere and is replenished by photosynthesis and the carbon cycle. Additionally, all life is carbon-based, so of course, carbon is also naturally occurring.
Choice C
Chemical compounds and substances surround us every day. Just as we need oxygen to breathe, carbon dioxide is also an important part of life. Carbon dioxide is a substance created by the bonding of carbon and two oxygen atoms when we breathe out. So, it is true that elements can be boned to create substances.
Choice D
As stated in the explanation for choice B, elements can be found naturally. There are some elements created in a lab like Technetium, but others such as sulfur and oxygen are not created in labs.
How long will it take a car to cover 870 miles if the car travels 35 mi/hr?
Answer:
To find out how long it will take a car to cover 870 miles at a speed of 35 miles per hour, we can use the formula:
time = distance ÷ speed
Plugging in the given values, we get:
time = 870 miles ÷ 35 miles per hour
Simplifying the right side by dividing 870 by 35, we get:
time = 24.86 hours
Rounding to the nearest hour, the answer is:
time = 25 hours
Therefore, it will take the car approximately 25 hours to cover a distance of 870 miles at a speed of 35 miles per hour.
in the bohr model of the hydrogen atom, an electron orbits a proton in a circular orbit of radius 0.53 x 10e-10 m. what is the electric potential at the electron's orbit due to the proton?
The electric potential is 27.2V
The electric potential (also called the electric field potential, potential drop, the electrostatic potential) is defined as the amount of work energy needed to move a unit of electric charge from a reference point to the specific point in an electric field.When an object is moved against the electric field, it gains some amount of energy which is defined as the electric potential energy. The electric potential of the charge is obtained by dividing the potential energy by the quantity of charge. When work is done in moving a charge of 1 coulomb from infinity to a particular point due to an electric field against the electrostatic force, then it is said to be 1 volt of the electrostatic potential at a point.Electric potential is given by equation: V = kq/r
where,
k = Coulomb's constant = 9 ×10⁹ N m²/C²
r = Radius = 0.53×10⁻¹⁰ m
Putting these values in above equation we get:
V = (9 ×10⁹)(1.6 × 10⁻¹⁹)/( 0.53×10⁻¹⁰) = 27.2 V
So the electric potential is 27.2V
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when a battery is connected to a complete circuit, charges flow in the circuit almost instantaneously. explain.
When a battery is connected to a complete circuit, charges flow almost instantaneously due to the electric field established within the circuit components.
The battery acts as an energy source, creating a potential difference or voltage across its terminals. This potential difference drives the movement of charges, typically electrons, within the circuit.
Electrons experience a force from the electric field, causing them to move from the negative terminal to the positive terminal of the battery. As electrons flow through the circuit, they encounter resistance in the form of various components such as resistors, capacitors, and inductors. Despite this resistance, the charges continue to flow, allowing the circuit to function.
The flow of charges, or current, is maintained by the battery's continuous supply of energy. The speed at which charges flow is determined by the properties of the circuit, such as the resistance and capacitance. Although the flow of individual electrons may be slow, the electric field itself travels at nearly the speed of light. This allows for the almost instantaneous flow of charges within the circuit.
In summary, when a battery is connected to a complete circuit, the electric field established by the potential difference across the battery terminals causes charges to flow almost instantaneously throughout the circuit. The flow of charges encounters resistance from circuit components but is maintained by the continuous energy supply from the battery.
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The composition of a star is determined from... Group of answer choices the amount of shift in the spectral lines in the spectrum. the pattern of spectral lines in its spectrum. the depth of spectral lines in the spectrum. the red or blue shift of spectral lines in a spectrum the width of the spectral lines in the spectrum
The composition of a star is determined from the red or blue shift of spectral lines in a spectrum, the width of the spectral lines in the spectrum.
What is spectroscopy ?The study of light and other radiation absorption and emission by matter is called spectroscopy. Electromagnetic radiation into its constituent wavelengths, in a spectrum, just like a prism splits light into a rainbow of colors.
The composition of a star is determined from the red or blue shift of spectral lines in a spectrum, the width of the spectral lines in the spectrum.
Hence, option D is correct.
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If a mass on the end of a spring takes 3 s to complete one cycle, its frequency isa. 3 s.b. 1/3 s.c. 3 Hz.d. 1/3 Hz
The frequency of an oscillating system can be calculated as the reciprocal of the period.
The frequency (f) of an oscillating system can be calculated using the formula:
f = 1 / T
where T represents the period of the oscillation.
In this case, the mass on the end of the spring takes 3 seconds to complete one cycle. The period (T) is equal to the time taken per cycle, which is 3 seconds.
Applying the formula, we can determine the frequency:
f = 1 / 3
Therefore, the frequency of the system is 1/3 Hz. Hence, the correct answer is option d: 1/3 Hz.
The frequency of an oscillating system is the reciprocal of its period. In this case, with a period of 3 seconds, the frequency is 1/3 Hz. This means that the system completes one cycle every 3 seconds, resulting in a frequency of 1/3 Hz.
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You and a friend each drive 50.0 km. You travel at 90.0 km/h; your friend travels at 95.0 km/h. How long will your friend have to wait for you at the end of the trip?
Answer:
1.08 hours
Explanation:
Distance = speed × time
Time = distance / speed
The time you spend driving is:
t = 50.0 km / (90.0 km/hr)
t = 0.555 hr
The time your friend spends driving is:
t = 50.0 km / (95.0 km/hr)
t = 0.526 hr
The total time is 0.555 hr + 0.526 hr = 1.08 hr.
I only have 3 minutes left this is my last question
If the radius increased between the two objects what would happen to gravitational force between them?
Answer:
The Gravitational Force would decrease
Explanation:
The equation Gm1m2/r^2 is the equation for gravitational force. If you look, as we increase the radius, the overall value will decrease as we move further apart.
The question states "The amplitude of a body undergoing simple harmonic motion is doubled. Which of the following is also doubled?
a) maximum speed
b) frequency
c) total energy
d) period
When the amplitude of a body undergoing simple harmonic motion is doubled then the maximum speed is doubled.
Equation of shm is
x(t) = Xo + Acos(wt + f)
Differentiate it with t
v(t) = wA * sin(wt + f)
Then max speed Vmax is wA
So by above relation if we double the amplitude then velocity will be doubled.
If the force acting on the oscillating body is always in the direction opposite to the displacement of the body from the equilibrium or the mean position and its magnitude is proportional to the magnitude of displacement, the body is said to be executing SHM.
If the displacement vs. time curve of the oscillating body is sinusoidal in nature, the body is said to be executing SHM. This is another definition of SHM.
If the potential energy of the oscillating body is proportional to the square of its displacement with reference to the mean position, the body is said to be executing SHM. This is yet another definition of SHM.
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A biker starting from rest reaches a final speed of 3.0 m/s in 3 seconds. What is the acceleration of the biker?
Answer:
1 m/s²
Explanation:
Given:
v₀ = 0 m/s
v = 3.0 m/s
t = 3 s
Find: a
a = (v − v₀) / t
a = (3.0 m/s − 0 m/s) / 3 s
a = 1 m/s²
Five grams of nitrogen gas at an initial pressure of 3.0 atm and at 20? C undergo an isobaric expansion until the volume has tripled.
a. What is the gas volume after the expansion?
b. What is the gas temperature after the expansion? The gas pressure is then decreased at constant volume until the original temperature is reached.
a. To determine the gas volume after the isobaric expansion, we can use the ideal gas law:
PV = nRT
Where P is the pressure, V is the volume, n is the amount of substance (in moles), R is the ideal gas constant, and T is the temperature (in Kelvin).
Since the pressure remains constant during the expansion, we can write:
(V1)(P1) = (V2)(P2)
where V1 and P1 are the initial volume and pressure, respectively, and V2 and P2 are the final volume and pressure, respectively. We can solve for V2:
V2 = (V1)(P1)/(P2) = (5 g)/(28.0134 g/mol)(3.0 atm) x 3 = 6.39 L
Therefore, the gas volume after the isobaric expansion is 6.39 L.
b. To determine the gas temperature after the isobaric expansion and subsequent decrease in pressure at constant volume, we can use the combined gas law:
(P1)(V1)/(T1) = (P2)(V2)/(T2)
where P1, V1, and T1 are the initial pressure, volume, and temperature, respectively, and P2, V2, and T2 are the final pressure, volume, and temperature, respectively.
Since the volume remains constant during the pressure decrease, we can write:
(P1)/(T1) = (P2)/(T2)
Solving for T2:
T2 = (P2)/(P1)(T1) = (1 atm)/(3.0 atm)(293 K) x 20 + 273 = 300.8 K
Therefore, the gas temperature after the isobaric expansion and pressure decrease is 300.8 K (27.65 °C).
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Which of the following types of material has the highest condensation temperature in the planetary system?
A. nitrogen gas
B. rocks and dust grains
C. gases such as methane, ammonia, water vapor
D. hydrogen
The type of material with the highest condensation temperature in the planetary system is B. rocks and dust grains
Condensation temperature refers to the temperature at which a substance transitions from a gaseous state to a solid or liquid state as the result of cooling. Different materials have different condensation temperatures, depending on their chemical composition and physical properties.
In the context of the planetary system, during the formation of planets and other celestial bodies, there is a process known as accretion where small solid particles collide and stick together, gradually forming larger objects. These solid particles are primarily composed of rocks and dust grains, which have relatively high condensation temperatures compared to gases.
Gases such as nitrogen gas (option A), methane, ammonia, and water vapor (option C), as well as hydrogen (option D), have lower condensation temperatures compared to rocks and dust grains. They typically exist in a gaseous state at temperatures found in the outer regions of planetary systems. However, as we move closer to the central star or a forming planet, where temperatures are higher, these gases can condense and form volatile compounds or liquids.
Understanding the condensation temperatures of different materials helps in explaining the formation and composition of planetary systems, as it provides insights into the distribution and abundance of different substances based on their physical properties. Therefore, Option B is correct.
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You have 12 Mohms of resistance, 9 amps of current, what is the voltage within the circuit?
\( \sf• \: We \: have \: 12 \: ohms \: of \: resistance, \: 9 \: amps \: of \: current.\)
\( \\ \)
\(\bf{ \underline{To \: Find :- }}\)\( \sf{• \: The \: Voltage\: within \: the\: circuit. }\)
\( \\ \)
\( \huge\bf{ \underline{ Solution:- }}\)
\( \sf According \: to \: the \: question, \)
\( \sf• \: Current \: (I) = 9 \: Amps.\)
\( \sf• \: Resistance \: (R) = 12 \: Ω\)
\( \sf{We \: know \: that, }\)
\( \bf \red{ \bigstar{ \: V = IR }}\)
\( \rightarrow \sf V = 9 \times 12\)
\( \rightarrow \sf V = 108\)
\( \\ \)
\( \sf \purple{Therefore, \: the \: voltage \: within \: the \: circuit \: is \: 108 \: v \: .}\)
If the car goes exits a freeway and goes from 65
mph to 35 mph is it accelerating?
Answer:
No, the car is decelerating
Explanation:
No the car is decelerating if it exits a freeway and goes from 65
mph to 35 mph since the change in velocity is negative.
change in velocity = final - initial
change in velocity = 35 - 65
change in velocity = -30mph
Since the change in velocity is negative, hence the car is decelerating. Deceleration is a negative acceleration
a current-carrying wire of length 50 cm is positioned perpendicular to a uniform magnetic field. if the current is 10.0 a and it is determined that there is a resultant force of 3.0 n on the wire due to the interaction of the current and field, what is the magnetic field strength?
Therefore, the magnetic field strength is 0.6 Tesla. The magnetic field strength can be calculated using the formula F = BIL, where F is the resultant force, B is the magnetic field strength, I is the current, and L is the length of the wire. Rearranging the formula to solve for B, we get B = F/(IL).
Given that the current is 10.0 A and the length of the wire is 50 cm (or 0.5 m), and the resultant force is 3.0 N, we can plug these values into the formula to get the magnetic field strength:
B = 3.0 N / (10.0 A x 0.5 m) = 0.6 T
Therefore, the magnetic field strength is 0.6 Tesla.
The magnetic field strength can be calculated using the formula F = BIL, where F is the resultant force, B is the magnetic field strength, I is the current, and L is the length of the wire. Rearranging the formula to solve for B, we get B = F/(IL).
Given that the current is 10.0 A and the length of the wire is 50 cm (or 0.5 m), and the resultant force is 3.0 N, we can plug these values into the formula to get the magnetic field strength:
B = 3.0 N / (10.0 A x 0.5 m) = 0.6 T
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An endothermic reaction is one in which heat is transferred from the surroundings to the reactants.
Please select the best answer from the choices provided
T
F
Answer:
An endothermic reaction is one in which heat is transferred from the surroundings to the reactants.------- true
Answer:
T . Energy is transferred to the reactants
Explanation:
A 10- kilogram box is at static equilibrium and the downward pull of gravity acting on the box is 98 Newton's what is the minimum force that would be required to just pick up the box ?
Answer:
Explanation:
Now
Look at it this way. This box is in equilibrium... Meaning forces around balanced out.
Now...
The Earth's pull on it is 98N
What Minimum external forces is needed to pick this up....
Now... The Minimum Force is 98N
Why?
Since This Box is under the influence of gravity...
Gravity is acting as a resistance
If you apply a force less than 98N... Let's say 50N on this box... It won't budge because your applied force is less than the resisting force on it(98N).
So We need a force ≥98. So the least force is 98N. Nothing below this will move the Box
Answer 98N.
Answer:
See image
Explanation:
Plato
Find the KE of a ball of mass 500 g moving with a velocity of 4 m/s . Plz fast i have just 5 mins
Answer:
4000 J
Explanation:
KE = (1/2)(m)(v^2)
KE = .5*500*(4^2)
KE = 4000 J
how often should a bimetallic stemmed thermometer br calibrated
A bimetallic stemmed thermometer should be calibrated at least once a year. It is important to ensure that the readings are accurate and consistent in order to maintain the integrity of the device. What is a bimetallic thermometer?A bimetallic thermometer is a device that uses two different metals to measure temperature.
The two metals expand at different rates when exposed to heat, causing the thermometer's dial to move and indicate the temperature. To calibrate a bimetallic thermometer, a calibration bath or temperature probe is used to compare the thermometer's readings to a known, accurate temperature.
There are several factors that can affect the accuracy of a bimetallic thermometer, including exposure to extreme temperatures, physical damage, and normal wear and tear. Regular calibration is essential to ensuring that the device remains accurate and reliable over time.
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What does the independent variable do?
Answer:
The independent variable is what you, the scientist, changes, and it causes the dependent variable to change.
Explanation:
Two people are sitting on wheeled chairs 1 metre apart. Person A is holding a 2kg ball. Person A throws the ball to Person. What happens to person A? Explain.
a.) their chair stays still
b.) chair rolls backwards
c.) chair rolls forwards
Answer:
B - Person A's chair rolls backwards.
Explanation:
This can be seen simply through the Conservation of Momentum. When the ball is thrown to be, the ball's momentum(+m) is transfererd to B, so B's chair moves forward(think about it - it makes sense, doesn't it?), meaning A's chair moves backwards.
So, B.
EXTRA TIP: Try drawing a diagram to help you!
A 5-kg ball rolling at a speed of 3 m/s strikes a 2-kg ball at rest. The 5-kg ball then comes to a stop and the 2-kg ball begins to roll forward. Determine how fast the 2-kg ball is moving.
Velocity: _ m/s
Answer:
7.5m/s
Explanation:
Law of conservation of momentum: momentum in a system before collision equals to that after collision/
5kg*3m/s=2kg*v
15kgm/s=2kg*v
v=7.5m/s
the diameter of the wheel of a car is 14 m. it makes 5 revolutions per 11 seconds. what is the speed of the car?
One revolution will cover a total distance equal to the circumference of the wheel. In order to determine the total number of revolutions, divide the total distance by the distance traveled by one revolution.
The x-axis was rotated by the equation y = x 3 x y = x3 - x. A function in the plane is rotated about a line in the plane to create a solid of revolution, which is a three-dimensional object. Integration can be used to determine this solid's volume. The total distance divided by "distance in one revolution" is (176/4.4), which equals the number of revolutions. As a result, a circular wheel needs to make 40 rotations. Vehicle speed is calculated as follows: is the circle constant, which denotes the ratio between the tire's perimeter and the wheels' revolutions per minute.
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A 10.0 kg box is dragged on a horizontal frictionless surface by a horizontal force of 10.0 N. If the applied force is doubled, the normal force on the box will
(a)Increase
(b)Remain the same
(c)Decrease
and explain.
Answer:
It will remain the same.
Explanation:
Because the force is horizontal, there is no y-component to add to the gravitational force to affect the normal force, since the normal force will be directed straight up because it is on a horizontal surface.
If the applied force is doubled, the normal force on the box will (b) Remain the same. Option b is correct.
The normal force on an object is the force exerted by a surface to support the weight of the object in a direction perpendicular to the surface. In the given scenario, the box is placed on a horizontal frictionless surface, so the normal force is equal to the weight of the box, which is given by the equation:
Normal force = Weight = mass × gravitational acceleration
= 10.0 kg × 9.81 m/s²
= 98.1 N.
When a horizontal force is applied to the box, it doesn't affect the normal force because the box is not moving vertically (up or down) and there is no vertical acceleration. Therefore, the normal force remains constant at 98.1 N.
When the applied force is doubled to 20.0 N, it only affects the box's acceleration and the net force acting on it (since there is no friction). The normal force does not change because there is no change in the vertical direction of the box's motion. The box's weight remains the same, and the surface continues to exert the same upward force to support the box's weight.
In summary, the normal force on the box will remain the same (option b) regardless of the change in the applied horizontal force because it is determined by the weight of the box and the absence of vertical acceleration or friction.
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the glowing filament in a lamp is radiating energy at a rate of 60 w. at the filament’s temperature of 1500∘c, the emissivity is 0.23. what is the surface area of the flament
The surface area of the flament is -4 m square feet.
What is surface?Surface means an outside part of an body or object.
We are asked to find the surface area. So we have to use the equation that relates power and surface area. So power is :
H= Ae σ T⁴
Where, H= power (60 watts)
A=area
σ=universal constant (5.67×10⁻⁸ w/m²)
T=Temperature(1773k)
So our surface area is just our area. A. So A. Is equal to power divided by the emissivity times of the Stefan bolts, mons, constant to the times the temperature to the fourth of power.
So now we can the substitute our values
(60/600.23)×5.67×10⁻⁸×1773⁴=4.65×10⁻⁴m²
Area of the filament is 4.65×10⁻⁴m²
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A jet is flying from atlanta to gulfport and is cruising at Mach .79 or 844 km/hr. During the last 89 km it reduces its speed for landing at a rate of -2780 km/hr^2. How long will it take for the jet to reach landing speed? What was the landing speed of the jet?
Answer:
The time it takes for the jet to reach landing speed is approximately 0.136 hours which is approximately 489 seconds
The landing speed is approximately 466.365 km/hr
Explanation:
The given parameters are;
The initial cruising speed of the jet = Mach 0.79 = 844 km/hr
The rate of speed reduction in the last 89 km = -2780 km/hr²
The distance it takes the jet to reduce its speed for landing = 89 km
Given the above information, we make use of the following equation of motion;
s = u·t - 1/2·a·t²
v² = u² - 2·a·s
Where;
s = The distance over which the acceleration (deceleration) is applied = 89 km
u = The initial velocity = 844 km/hr
t = The time taken for the accelerating/decelerating motion
v = The final velocity (landing speed)
Substituting the values gives;
v² = 844² - 2·(2780)·89 = 217496
v = √217496 = 466.365 km/hr
v ≈ 466.365 km/hr
Therefore, the landing speed, v ≈ 466.365 km/hr
The time it takes is given by the equation, v = u - a·t
Therefore;
t = (u - v)/a = (844 - 466.365)/2780 ≈ 0.136 hours
The time it takes for the jet to reach landing speed ≈ 0.136 hours
From, s = u·t - 1/2·a·t², we have
89 = 844·t - 1/2 × 2780 × t²
89 = 844·t - 1390 × t²
1390 × t² - 844·t + 89 = 0
Solving with an online application gives;
t = 211/695 + (√(27187/2))/695 = 0.4715 hours or t = 211/695 - (√(27187/2))/695 = 0.136 hours
We note that the second time is for the time it will take the jet to get back to 89 km after reaching a speed of 0
Therefore, the correct time is t = 0.136 hours
The time it takes for the jet to reach landing speed ≈ 0.136 hours
According to the big-bang theory how the universe might end?
Answer:
If the Universe holds enough matter, including dark matter, the combined gravitational attraction of everything will gradually halt this expansion and precipitate the ultimate collapse. Over time, galaxies, then individual stars, will smash into each other more frequently, killing off any life on nearby planets.
A ball is dropped from the top of a cliff. Which graph best represents the relationship between the ball's total energy and the elapsed time as the ball falls to the ground?
Graph A does.
The work you do to carry the ball up to the top of the cliff is the total energy it has.
Before you drop it, all that energy is potential energy.
Once you drop it, the potential energy starts to turn into kinetic energy as it falls.
When it hits the ground, its kinetic energy is exactly the amount of potential energy it had at the top, and it has no more potential energy.
The total (potential + kinetic) energy is the same amount all the way down. Energy isn't created or destroyed.
The graph that shows the ball's total energy and the elapsed time as the ball falls to the ground is graph A.
For a body that is falling from a height, the potential energy of the body is being converted to kinetic energy. We must note that the total mechanical energy of the body is constant.
As such, the graph that shows the ball's total energy and the elapsed time as the ball falls to the ground is graph A.
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An ekg technician is entering a patient's history into the electronic health record. which one of the following statements by the patient should the technician enter into the social history section?
The statement by the patient that the technician entered into the social history section is "I have smoked cigarettes for a long time."
Technicians are skilled experts employed in nearly every enterprise. They restore, install, replace, and service one-of-a-kind systems and gadgets. Technicians normally work alongside other professional people and ought to be able to study instructions and communicate successfully.
An instance a technician is someone who works in a lab and who runs a gadget that separates microorganisms from blood samples in order to test for illness. An artist, creator, musician, etc. who has notable technical skill or understanding.
Technician careers are a remarkable choice if you need to go into the staff speedy, or are looking for an access-level position. Technicians play an important function across a wide variety of industries, providing essential hard work to keep the general public secure, entertained, linked, and healthful.
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astronomers believe that jupiter’s strong magnetic field is caused by?
First, the size of Jupiter means that it has a larger core than the other planets.
A larger core means more core particles are interacting to generate a stronger electrical current. The other factor is the speed of Jupiter's rotation. Jupiter's strong magnetic field is generated in Jupiter's thick layers of metallic hydrogen.
Its magnetic field creates a magnetosphere to surround the planet and shield it from solar winds. It traps more charged particles than Earth's. They create belts of intense radiation around Jupiter.
The strong magnetic field is produced by the rotation of the planet and convection in a metallic core. Because Jupiter is so large and spins so fast, its magnetic field is very strong. It is over 20,000 times stronger than Earth's.
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