Answer:
Avogadro's law states that, at the same temperature and pressure, equal volumes of all gases have the same number of molecules.
Explanation: Another statement is, "Volume is directly proportional to the number of moles."
The mass of planet x is one tenth that of the earth, and its radius is one half that of the earth. the acceleration due to gravity at the surface of planet x is most nearly: (a) 2m/s2 (b) 4m/s2 (c) 5m/s2 (d) 7 m/s2 (e) 10 m/s2
The acceleration due to gravity at the surface of planet X is most nearly 4 m/s².
Gravity is a fundamental force of nature that attracts objects with mass or energy toward each other.
The acceleration due to gravity can be calculated using the formula: g = (G * M) / r², where g is the acceleration due to gravity, G is the gravitational constant, M is the mass of the planet, and r is the radius of the planet.
Given that the mass of planet X is one-tenth that of Earth and its radius is one-half that of Earth, we can substitute these values into the formula.
Let's assume the mass of Earth is Mₑ and the radius of Earth is rₑ. Therefore, the mass of planet X is Mₓ = Mₑ/10 and the radius of planet X is rₓ = rₑ/2.
Substituting these values into the formula, we have gₓ = (G * Mₓ) / rₓ². Simplifying this equation, we get gₓ = (G * (Mₑ/10)) / (rₑ/2)².
Since G, Mₑ, and rₑ are constants, we can simplify the equation further: gₓ = (1/5) * gₑ, where gₑ is the acceleration due to gravity on Earth.
Given that gₑ is approximately 9.8 m/s², we can substitute it into the equation to find gₓ: gₓ = (1/5) * 9.8 m/s² ≈ 1.96 m/s².
Rounding to the nearest whole number, the acceleration due to gravity at the surface of planet X is most nearly 4 m/s².
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2. On the third day, the student sits 6 meters from the bell. What happens to the
intensity of the sound that she hears the third day compared with the first day? Recall
that the student sat 2 meters from the bell on the first day.
On the third day, the pupil is seated six meters away from the bell. the first day's student seat was 2 meters away from the bell . Sound intensity is expressed in decibels (dB).
What is meant by intensity of sound?Acoustic intensity, also referred to as sound intensity, is the amount of energy carried by sound waves per unit of area in a direction perpendicular to that area. The SI measure for intensity, which also covers sound intensity, is the watt per square meter (W/m2). Sound intensity is expressed in decibels (dB).
A 10 dB rise will result in an intensity that is 10 times larger since the scale of sound perception is logarithmic. For instance, a whisper is 1,000 times quieter than the sound of the waves at the seaside, which is a rise of 30 dB. The distance between a wave's resting position and its crest is known as its amplitude, whereas the sound intensity is defined as the sound power per unit area.
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Why does the comet have tails
Answer:
Comets leave long beautiful tails when they come close to the sun. ... But when it approaches the sun, the heat evaporates the comet's gases, causing it to emit dust and microparticles (electrons and ions). These materials form a tail whose flow is affected by the sun's radiation pressure.
Explanation: I just searched it up on the internet lol.
Answer:
when it approaches the sun, the heat evaporates the comet's gases, causing it to emit dust and micro particles
Explanation:
:)
Why do seat belts help protect passengers when a car stops quickly? Explain your answer in terms of forces and motions.
Answer:
If the driver is wearing a seat belt, the seat belt rather than the windshield applies the unbalanced force that stops the driver's forward motion. The force from the seat belt is applied over a longer time, so the force causes less damage.
Explanation:
Compare and contrast how heat flows between a person and the environment for someone submerged in water and for someone in the air
Heat transfer between a person and the environment occurs through the processes of convection, conduction, and radiation. The rate of heat transfer depends on factors such as the temperature difference between the person.
What is a conduction ?Conduction is a process of heat transfer that occurs through a material or between two materials that are in direct contact with each other. In this process, heat flows from a region of higher temperature to a region of lower temperature through molecular collisions. The heat energy is transferred through the material or the contact surface by means of the vibration and movement of the molecules.
Conduction is responsible for heat transfer in solids, such as metals, ceramics, and polymers, and it can also occur between different solids in contact with each other. The rate of conduction depends on several factors, including the thermal conductivity of the material, the temperature difference between the two regions, the thickness of the material, and the surface area of contact.
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Suppose a small car and a large truck run out of gas at the same location. Which vehicle will be
more difficult to push to the gas station? Explain your response in terms of Newton's second law.
According to Newton's second law of motion, the force required to accelerate an object is directly proportional to its mass. This means that the larger the mass of an object, the greater the force required to move it.
Which vehicle will be more difficult to push to the gas station?In this scenario, the large truck has a much greater mass than the small car. Therefore, the large truck would be more difficult to push to the gas station. It would require a much greater force to overcome its inertia and start its motion. Once the truck is in motion, it would also require a greater force to keep it moving at a constant speed.
On the other hand, the small car has a smaller mass and would require less force to push it to the gas station. Once in motion, it would require less force to maintain its speed.
Therefore, due to the larger mass of the truck, it would be more difficult to push to the gas station compared to the smaller car.
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What can cause electricity to jump across a gap
Answer:
It often happens in a circuit which was conducting,and a switch is opened. Any inductance in the circuit will help the voltage increase due to back emf,and this can cause breakdown of the air insulation and an arc can form.
Explanation:
Which of toby's answers is a correct description of what happens when a 1-kg cart traveling at 1 m/s collides inelastically with another 1-kg cart at rest?.
Answer:
hi I don't know sorry sorry forgive me
Explanation:
sorry
an iron rod of length 100m at 10 degree Celsius is used to measure a distance of 2km on a day when the temperature is 40 degree Celsius. Calculate the error in measuring the distance
Answer:
0.68 m
Explanation:
α = dL / L1*(dT)
dL = L1(dT) * α
Initial length, L1 = 100
Chang in Length =dL
α linear expansivity ; dL = change in length ; dT = change in temperature ; L1 = initial length
α of iron rod = 1.13 * 10^-5 k
dL = 100(40 - 10) * 1.13 * 10^-5
dL = 100(30) * 1.13 * 10^-5
dL = 3000 * 1.13 * 10^-5
dL = 3390 * 10^-5
dL = 0.0339 m
Error :
Distance measured = 2km = (2 * 1000) = 2000m
[Distance measured / (initial length + change in length)] × change in length
Error = (2000 / (100 + 0.0339)) * 0.0339
Error = (2000 / 100.0339) * 0.0339
Error = 19.993222 * 0.0339
Error = 0.6777702
Error = 0.68 m
if you swim with the current in a river, your speed is increased by the speed of the water; if you swim against the current, your speed is decreased by the water's speed. the current in a river flows at 0.52 m/s. in still water you can swim at 1.73 m/s.
When swimming with the current, your speed would be more than 2.25 m/s, and when swimming against the current, your speed would be more than 1.21 m/s.
Let's consider the scenario of swimming with the current first. If the current is flowing at 0.52 m/s and you can swim at 1.73 m/s in still water, your total speed when swimming with the current would be the sum of the two speeds: 1.73 m/s + 0.52 m/s = 2.25 m/s. So, when swimming with the current, your speed would be more than 2.25 m/s.
Now, let's consider the scenario of swimming against the current. When swimming against the current, your speed is decreased by the speed of the water. Therefore, your effective speed would be the difference between your swimming speed and the speed of the current.
In this case, your effective speed would be 1.73 m/s - 0.52 m/s = 1.21 m/s. So, when swimming against the current, your speed would be more than 1.21 m/s.
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Electric field lines can never cross. What would crossed electric field lines indicate?
a field pointing in two directions
an attractive force on a charge
a nonuniform area of the field
a place where the field strength is zero
Answer:
It indicates that a force has 2 directions at the point at which they cross
Answer:
A. A field pointing in two directions
if a thin thread is placed between a screen and a bright source of light, a pattern of parallel dark and bright fringes appears on the screen. the phenomenon best explaining the formation of this pattern is:
If a thin thread is placed between a screen and a bright source of light, a pattern of of parallel light and dark strips appears on the screen. This phenomenon is called the diffraction of light.
When a thin thread comes in the path of light waves, it obstructs the upfront of the light wave causing the change in the phase difference of the wave. Overlapping of these different waves of different phase differences cause the dark and light pattern appearance on the wall. On the other hand, thin thread also cast a thin shadow due to the obstruction in the path of light. Pattern on the wall depends on the phase difference in the wave-upfront.
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Will the capacity of three phase transformer change with the
change of the configuration
If yes give example
The capacity of a three-phase transformer can change with the change of configuration. The capacity of a transformer is determined by the ratio of the number of turns on the primary and secondary windings. When the configuration of the windings is changed, the turns ratio also changes, which affects the capacity of the transformer.
For example, let's consider a three-phase transformer with a Y-Y configuration. In this configuration, the primary and secondary windings are connected in a star or Y configuration. If we change the configuration to a delta or Δ configuration, the turns ratio will change, resulting in a different capacity for the transformer. This means that the transformer can handle a different amount of power in the new configuration.
In summary, the capacity of a three-phase transformer can change with the change of the configuration. When the configuration of the windings is changed, the turns ratio changes, which affects the capacity of the transformer. An example is changing from a Y-Y configuration to a delta or Δ configuration, which results in a different capacity for the transformer.
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Two point charges, q1 and q2, are placed 0.30 m apart on the x-axis, as shown in the figure above. Charge q1 has a value of -3.0 x 10-9 C. The net electric field at point P is zero.
How much work must be done by an external force to bring an electron from infinity to the point at which the electric potential is zero? Explain your reasoning.
To bring an electron from infinity to the point where the electric potential is zero, an external force must work against the electric field created by the two-point charges q1 and q2. The work done by the external force is equal to the change in the electric potential energy of the electron. In summary, no external work is required.
The electric potential at infinity is defined as zero, so the initial electric potential energy of the electron is also zero. As the electron moves closer to the point where the electric potential is zero, the electric potential energy increases. At the point where the net electric field is zero, the electric potential energy of the electron is maximum.
Therefore, the work done by the external force is equal to the maximum electric potential energy of the electron at the point where the net electric field is zero. This work can be calculated using the equation:
Work = (electron charge) x (maximum electric potential)
Since the charge of an electron is -1.6 x 10^-19 C, and the maximum electric potential is equal to the electric potential at point P, which is zero, the work done by the external force to bring the electron from infinity to point P is zero.
In summary, no external work is required to bring an electron from infinity to the point at which the electric potential is zero, as the maximum electric potential energy of the electron at point P is zero.
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how much force is needed to accelerate a 48 kg object to 3 m/s²
Answer:
144 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 48 × 3
We have the final answer as
144 NHope this helps you
A 15 cm length of wire is moving perpendicularly
through a magnetic field of strength 1.4 T at the rate
of 0.12 m/s. What is the EMF induced in the wire?
A. OV
C. 0.025 v
B. 0.018 V
D. 2.5 V
Answer: C or B
Explanation:
The EMF induced in the wire moving perpendicularly through a magnetic field is 0.025V. The correct option is C.
What is EMF?The EMF is the electro motive force which causes the current to induce in the object moving in the magnetic field.
Given is the length of wire L =15cm =0.15m, magnetic field strength B = 1.4T and velocity of wire V =0.12 m/s
EMF is related to the length of wire, magnetic field strength and velocity of wire proportionally.
ε = B x L x V
Plug the values, we get
ε = 1.4 x 0.15 x 0.12
ε = 0.025 Volts
Thus, the correct option is C.
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Referring to the information PEI received through March 2010 from the Stop the Static Campaign reading, what was the general pattern for gas pump fires by month? Why do you think this trend
emerged?
The common cause for gas pump fires is static electrical discharge.
What is static electricity?Static electricity is an imbalance of electric charges within or on the surface of a material or between materials.
In petrol pumps,
During refueling, many petroleum products become electrically charged when they flow through pipes and hoses, including gasoline, kerosene, petrol, diesel etc. which are poor electrical conductors.
Charge remains until it is able to move away by means of an electric current or electrical discharge which causes the static spark that can ignite gasoline vapors, causing a flash fire.
Hence, static electrical discharge is common cause of gas pump fires.
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A 2kg box has a speed of 10m/s at the bottom of a 37 degree inclined ramp
A)how far up the ramp does the box slides if the ramp was friction less
B)how far does it slides if the coefficient of kinetic friction is 0.2
The box travels 3.33 meters up the ramp with no friction and 1.56 meters with friction.
Calculation-Frictionless ramp:
K_i = (1/2)mv_i^2 = (1/2)(2 kg)(10 m/s)^2 = 100 J
K_f = 0
U_f = mgh
Since energy is conserved, we have:
K_i = U_f
(1/2)mv_i^2 = mgh
h = (1/2)(v_i^2)/g * sin^2(theta) = (1/2)(10 m/s)^2 / (9.81 m/s^2) * sin^2(37 degrees) = 3.33 m
Ramp with friction:f_friction = μ_k * f_norm
W_friction = f_friction * d = μ_k * f_norm * d
K_i = U_f + W_friction
(1/2)mv_i^2 = mgh + μ_k * f_norm * d
d = (v_i^2 - 2gh)/(2μ_kf_norm) = ((10 m/s)^2 - 2*(9.81 m/s^2)sin(37 degrees)(3.33 m))/(20.22 kg*cos(37 degrees)*9.81 m/s^2) = 1.56 m
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A car accelerate uniformly from rest at 5m/s2 . Determine it's speed after 10s
Answer:
50m/s.
Explanation:
Let's take acceleration as A and speed as S:
A = 5m/s²
S = A × 10s = 5 × 10 = 50m/s
The answer is 50m/s.
Answer:
50m/s
Explanation:
Given:
a=5m/s^2
t=10s
Required:
v=?
Formula:
a=v/t
Solution:
a=v/t
v=a*t
v=5m/s^2*10s
v=50m/s
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draw the structure of the product(s) obtained when d-ribose reacts with br2/h2o/caco3
The balance of the equation 2Br2 + CaCO3 + H2O = CaBr2 + CO2 + 2HBrO is ensured by the equal distribution of each element between the reactants and the products.
Bromination can take place in a number of ways, depending on the reactant. A saturated molecule is bromine using the free radical technique. An unsaturated hydrocarbon undergoes bromination through an addition mechanism. An aromatic compound is bromined by an electrophilic substitution procedure.
Meta-bromo-benzoic acid and hydrogen bromide are the end products of the chemical reaction between bromine and benzoic acid described above. The bromine water test is a simple way to tell fructose from glucose. The glucose undergoes an oxidation reaction to produce glucuronic acid after interacting with the bromine water solution. Since bromine water has a modest oxidizing effect, fructose does not oxidize in it.
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A bird can fly 25 km/hr. How long does it take to fly 10 km?
Answer:
25 minutes
Explanation:
A charged, parallel-plate capacitor is isolated. If the distance separating the plates of the capacitor decreases to half the original distance, what happens to the magnitude of the electric field between the two plates?
Hi there!
Recall the following:
\(C = \frac{Q}{V}\)
C = Capacitance (F)
Q = Charge (C)
V = Potential difference (V)
The equation for the capacitance of a parallel-plate capacitor:
\(C = \frac{\epsilon_0 A}{d}\)
C = Capacitance (F)
ε₀ = Permittivity of Free Space
A = Area of plates (m²)
d = distance between plates (m)
If the distance is halved, the capacitance will DOUBLE since there is an inverse relationship between capacitance and distance.
Thus, something has to change in regards to the charge or voltage for it to match the doubled capacitance.
Since the capacitor is ISOLATED, it is not connected to a battery, so the voltage is NOT maintained constant. The VOLTAGE will consequentially be changed, while the electric field will be unchanged.
Recall the equation for potential difference:
\(V = Ed\)
If the distance is halved, the voltage will be halved. This is mirrored by the doubled capacitance. Thus, the electric field will remain the SAME.
A specified volume of space contains an electric field for which the magnitude is given by E=E0cos(ωt). Suppose that E0 = 20 V/m and ω = 1.0 × 107 s−1. What is the maximum displacement current through a 0.40 m2 cross-sectional area of this volume?
Answer: \(0.708\ mA\)
Explanation:
Given
\(E_o=20\ V/m\)
\(\omega =10^7\ s^{-1}\)
Cross-sectional area \(A=0.40\ m^2\)
Current density is given by
\(J=\epsilon_o \dfrac{dE}{dt}\)
Displacement current
\(\Rightarrow I=JA\\\Rightarrow I=8.854\times 10^{-12}\times 20\times 10^7\times 0.4\\\Rightarrow I=0.708\times 10^{-3}\ A\)
The required value of the maximum displacement current of the given space is \(7.08 \times 10^{-4} \;\rm A\).
Given data:
The intensity of electric field is, \(E_{0}=20 \;\rm V/m\).
The angular frequency of electric field is, \(\omega=1.0 \times 10^{7} \;\rm s^{-1}\).
The cross-sectional area of space is, \(A =0.40 \;\rm m^{2}\).
In the given problem, the instantaneous electric field is given by \(E = E_{0} \times cos(\omega t)\)
So, the expression for the current density is,
\(J= \epsilon_{0} \times \dfrac{dE}{dt}\)
Here, \(\epsilon_{0}\) is the permittivity of free space. Solving as,
\(J= \epsilon_{0} \times \dfrac{d(E_{0} \times cos(\omega t))}{dt}\\\\J= -\epsilon_{0} \times E_{0} \times \omega \times sin(\omega t)\)
And the expression for the maximum displacement current is,
\(I = J \times A\)
And the maximum displacement current is possible only when, J is positive and J will be positive for \(sin(\omega t)=-1\).
Then solving as,
\(I = (-\epsilon_{0} \times E_{0} \times \omega \times sin(\omega t)) \times A\\\\I = (-8.85 \times 10^{-12} \times 20 \times (1.0 \times 10^{7}) \times (-1)) \times 0.40\\\\I = 7.08 \times 10^{-4} \;\rm A\)
Thus, we can conclude that the required value of the maximum displacement current of the given space is \(7.08 \times 10^{-4} \;\rm A\).
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which best describes one main difference between rachel carson’s silent spring and winona laduke’s a case for waawaatesi?
Rachel Carson's "Silent Spring" is more of a scientific work, with an emphasis on the negative effects of pesticides. It is written in a very straightforward, logical manner that presents the facts in a clear and concise manner.
One main difference between Rachel Carson's "Silent Spring" and Winona LaDuke's "A Case for Waawaatesi" is that "Silent Spring" was written to warn the public about the dangers of pesticides, while "A Case for Waawaatesi" was written to raise awareness about the impact of mining on Native American land. According to the given question, it is clear that we have to find out the main difference between Rachel Carson's "Silent Spring" and Winona LaDuke's "A Case for Waawaatesi. "Rachel Carson's "Silent Spring" Rachel Carson's "Silent Spring" was published in 1962.
Rachel Carson used the metaphor of a "silent spring" to describe the devastation wrought by DDT and other pesticides, which she argued threatened to destroy natural habitats and cause cancer and other health problems in humans. Carson's book, which is widely regarded as a classic of environmental literature, played a key role in launching the modern environmental movement. Wiona LaDuke's "A Case for Waawaatesi" Wiona LaDuke's "A Case for Waawaatesi" is a powerful indictment of the mining industry's impact on Native American communities. LaDuke argues that mining companies have destroyed native lands and resources, polluted the environment, and threatened the health and well-being of indigenous peoples.
One main difference between Rachel Carson's "Silent Spring" and Winona LaDuke's "A Case for Waawaatesi" is that "Silent Spring" was written to warn the public about the dangers of pesticides, while "A Case for Waawaatesi" was written to raise awareness about the impact of mining on Native American land.
Therefore, some more differences between these two books are as follows: Rachel Carson's "Silent Spring" is more of a scientific work, with an emphasis on the negative effects of pesticides. It is written in a very straightforward, logical manner that presents the facts in a clear and concise manner. In contrast, Winona LaDuke's "A Case for Waawaatesi" is more of a political work, with an emphasis on activism and raising awareness about the impact of mining on Native American communities. La Duke uses vivid language and storytelling techniques to make her argument, and her work is infused with a sense of urgency and a call to action. Overall, the main difference between these two books is their focus: Rachel Carson's "Silent Spring" is focused on the dangers of pesticides, while Winona LaDuke's "A Case for Waawaatesi" is focused on the impact of mining on Native American communities.
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A ladder with a length of 12.3 m and weight of 591.0 N rests against a frictionless wall, making an angle of 61.0° with the horizontal. Find the horizontal force exerted on the base of the ladder by Earth when a firefighter weighing 898.0 N is 3.91 m from the bottom of the ladder. Answer in units of N.
The horizontal force exerted on the base of the ladder by Earth is approximately 50.9 N.
To find the horizontal force exerted on the base of the ladder by Earth, we need to consider the torque equilibrium of the ladder.
First, let's determine the vertical and horizontal components of the ladder's weight. The weight of the ladder is given as 591.0 N. The vertical component is given by:
Vertical Component = Weight of Ladder × sin(61.0°)
= 591.0 N × sin(61.0°)
≈ 505.0 N
The horizontal component of the ladder's weight is given by:
Horizontal Component = Weight of Ladder × cos(61.0°)
= 591.0 N × cos(61.0°)
≈ 299.7 N
Next, we need to consider the weight of the firefighter. The weight of the firefighter is given as 898.0 N. The vertical component of the firefighter's weight does not exert any torque because it passes through the point of contact. Therefore, we only need to consider the horizontal component of the firefighter's weight, which is:
Horizontal Component of Firefighter's Weight = Weight of Firefighter × cos(61.0°)
= 898.0 N × cos(61.0°)
≈ 453.7 N
Now, let's consider the torque equilibrium. The torques exerted by the ladder and the firefighter must balance each other out. The torque exerted by the ladder is given by the product of the vertical component of the ladder's weight and its distance from the bottom:
Torque by Ladder = Vertical Component of Ladder's Weight × Distance from Bottom
= 505.0 N × 3.91 m
≈ 1976.6 N·m
The torque exerted by the firefighter is given by the product of the horizontal component of the firefighter's weight and its distance from the bottom:
Torque by Firefighter = Horizontal Component of Firefighter's Weight × Distance from Bottom
= 453.7 N × 3.91 m
≈ 1775.7 N·m
Since the ladder is in equilibrium, the torques exerted by the ladder and the firefighter must balance each other out:
Torque by Ladder = Torque by Firefighter
To maintain equilibrium, the horizontal force exerted on the base of the ladder by Earth must balance out the torques. Therefore, the horizontal force exerted on the base of the ladder by Earth is:
Horizontal Force = (Torque by Ladder - Torque by Firefighter) / Distance from Bottom
= (1976.6 N·m - 1775.7 N·m) / 3.91 m
≈ 50.9 N
Therefore, the horizontal force exerted on the base of the ladder by Earth is approximately 50.9 N.
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A particular lightbulb is designed to consume 40 W when operating on a car's 12-V DC electric power. If you supply that bulb with 12-V AC power from a transformer, how much power will it consume
Most of the mass of the milky way exists in the form of.
Answer: Dark matter.
Explanation: Hope it helps :)
If the resistance of an electric iron is 40 and a current of 2.2 A flows
through the resistance. Find the voltage between two points. *
Answer:
88 volts
Explanation:
Ohm's law gives the formula : I = V/R
In this case, since we are solving for voltage, you simply rearrange the equation to be : V = I * R
Therefore, given the resistance and current, you just plug in the numbers.
Voltage = 40 ohms * 2.2 amperes
Voltage = 88 volts
Describe how could you use an electromagnete to sort a mixture of iron and copper pieces into two seprate piles of iron and copper
Answer:
Electromagnetic cranes are used to separate copper from iron in a scrap yard. The current is switched on to energies the electromagnet and pick up the iron pieces from the scrap. Then these iron pieces are moved to another position, the electromagnet in switched off and the iron pieces are released.
Explanation:
What kinds of stars have either no habitable zones or very inferior ones