The distance from Earth to Mars is 54.6 millions kilometers. A helium molecule has a length of approximately 280 picometers. Find how many helium molecules could fit between these two planets.(Tip: research what are picometers)
Answers
Answer:
Approximately 1.95 x 10^20 helium molecules
Explanation:
A picometer is a unit of length equal to one trillionth of a meter, or 10^-12 meters. To find out how many helium molecules could fit between Earth and Mars, we need to first calculate the distance between them in picometers:
54.6 million kilometers = 54.6 x 10^9 meters
54.6 x 10^9 meters = 54.6 x 10^21 picometers (since there are 10^12 picometers in a meter)
Next, we need to calculate how many helium molecules can fit in this distance. We can do this by dividing the distance between Earth and Mars by the length of a helium molecule:
54.6 x 10^21 picometers / 280 picometers per helium molecule
= 1.95 x 10^20 helium molecules
Therefore, approximately 1.95 x 10^20 helium molecules could fit between Earth and Mars, assuming they were lined up end to end without any space between them.
Related Questions
Ram and Hari both are good Swimmer and can Swim with same speed in still water, they set off across the river at the same time. Ram moves straight across and Hari is pulled downstream by the current somewhat. Hari head upstream at angle so as to arrive at a point directly opposite to straight point. Who will cross the river first?
Comment.
Answers
As per the given scenario, Ram will cross the river first.
Ram chooses the quickest route and crosses the river without turning. Ram and Hari can both swim in still water at the same speed, hence their respective speeds when crossing the river will be equivalent. Ram will be able to get to the opposing bank the fastest as a result.
Hari, on the other hand, is swimming upstream at an angle and is being dragged downstream by the water.
Hari's overall travel distance will increase due to the downstream current, however his effective speed will drop in comparison to the other bank. Hari will therefore take longer than Ram to get to the opposing bank.
Thus, Ram will cross the river first in this scenario.
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Two people carry identical 40.0N boxes up the ramp. The ramp is 2.00m long and 1.00m high. Person A walks up the ramp in 2.00s. Person B walks up the ramp in 4.00s. What is the difference in power the two people use to carry the boxes up the ramp
Answers
The difference in power for two people carrying the boxes up the ramp is 30 W.
Given the following data:
W = 40.0 N is the weight of a box.
The ramp's length is L = 2.00 m.
The platform height is h = 1.0 m.
t = 2.0 s is the time interval for the first person.
t' = 4.0 s is the time interval for the other person.
Power is the rate at which energy is used. The expression for the Power is given in the given question as,
P = W×(L+h)/t
Assume that you are solving for the first person.
P₁ = W(L+h)/t₁.................................................................. (1)
Substitute the following values into equation (1):
P₁ = 40(2+1)/2
P₁ = 20(3) (3)
P₁ = 60 W.
Regarding the second person,
P₂ = W(L+h)/t₂..................................................................... (2)
Fill in the blanks in equation (2) as follows:
P₂ = 40(2+1)/4
P₂ = 10*(3) *3)
P₂ = 30 W
Obtaining the difference in power as
P = P₁ - P₂
P = 60-30
P = 30 W
As a result, we can conclude that the difference in power for two people carrying the boxes up the ramp is 30 W.
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A car is moving at 30km/h. What is its speed in m/s? Give your answer to 2 significant figures.
Answers
Explanation is in the attachment
hope it is helpful to you
How many more neutrons are in a I SOTOPE of copper-14 than in standard carbon atom
Answers
Answer:
2 more neutrons
Explanation:
To obtain the answer to the question, let us calculate the number of neutrons in carbon–14 and standard carbon (i.e carbon–12). This can be obtained as follow:
For carbon–14:
Mass number = 14
Proton number = 6
Neutron number =?
Mass number = Proton + Neutron
14 = 6 + Neutron
Collect like terms
14 – 6 = Neutron
8 = Neutron
Neutron number = 8
For carbon–12:
Mass number = 12
Proton number = 6
Neutron number =?
Mass number = Proton + Neutron
12 = 6 + Neutron
Collect like terms
12 – 6 = Neutron
6 = Neutron
Neutron number = 6
SUMMARY:
Neutron number of carbon–14 = 8
Neutron number of carbon–12 = 6
Finally, we shall determine the difference in the neutron number. This can be obtained as follow:
Neutron number of carbon–14 = 8
Neutron number of carbon–12 = 6
Difference =?
Difference = (Neutron number of carbon–14) – (Neutron number of carbon–12)
Difference = 8 – 6
Difference = 2
Therefore, carbon–14 has 2 more neutrons than standard carbon (i.e carbon–12)
A fast humvee drove from desert a to desert b for the first 12 hours it travelled at an average speed of 185km/h for the next 13 hours it travelled at an average speed of 160km/h what was the average speed of the whole journey
Answers
Answer:
The average speed of the whole journey is, v = 172 km/h
Explanation:
It is given that, a fast humvee drove from desert a to desert b. The scenario is as follows :
For the first 12 hours, it traveled at an average speed of 185 km/h. Let d₁ is distance. So,
\(d_1=v_1\times t_1\\\\d_1=185\ km/h\times 12\ h\\\\d_1=2220\ km\)
For the next 13 hours, it traveled at an average speed of 160 km/h. Let d₂ is the distance. So,
\(d_2=v_2\times t_2\\\\d_2=160\ km/h\times 13\ h\\\\d_2=2080\ km\)
Average speed = total distance/time taken
So,
\(v=\dfrac{d_1+d_2}{t_1+t_2}\\\\v=\dfrac{2220+2080}{12+13}\\\\v=172\ km/h\)
Therefore, the average speed of the whole journey is 172 km/h.
Find the x- and y- components of a 20 N, 30o south of west vector.
Answers
Answer:
Explanation:
If a force of 20N is situated at 30° south west, the x and y component of the vector will be expressed as:
Fx = -Fcos 30° and Fy = -Fsin30°
They are but negative because the force acts in the third quadrant of a four cardinal point
Fx = -20cos30°
Fx = -20(√3/2)
Fx = -10√3N
Hence the -x component if the force is -10√3N
Fy = -20sin30°
Fy = -20(1/2)
Fy = -10N
Hence the y-component is the vector is -10N
a car's bumper is designed to withstand a 12.7 mph (5.68-m/s) collision with an immovable object without damage to the body of the car. the bumper cushions the shock by absorbing the force over a distance. calculate the magnitude of the average force on a bumper that collapses 0.237 m while bringing a 925 kg car to rest from an initial speed of 5.68 m/s.
Answers
In conclusion, the magnitude of the average force on the car's bumper that collapses 0.237 m while bringing the 925 kg car to rest from an initial speed of 5.68 m/s is approximately 62903.37 Newtons.
To calculate the magnitude of the average force on the car's bumper, we can use the formula:
Force = (mass × change in velocity) ÷ time
Given:
Mass of the car (m) = 925 kg
Initial velocity (u) = 5.68 m/s
Final velocity (v) = 0 m/s
Change in velocity (Δv) = v - u
= 0 - 5.68
= -5.68 m/s (since the car comes to rest)
Distance over which the force is absorbed (s) = 0.237 m
First, we need to calculate the time it takes for the car to come to rest. We can use the equation:
v = u + at
Since the car comes to rest, the final velocity (v) is 0 m/s. Plugging in the values:
0 = 5.68 + a × t
Solving for acceleration (a):
a × t = -5.68
a = -5.68 ÷ t
Next, we need to find the time it takes for the car to collapse the bumper over a distance of 0.237 m. We can use the equation:
s = ut + (1/2)at²
Plugging in the values:
0.237 = 5.68t + (1/2)(-5.68 ÷ t)t²
Simplifying the equation:
0.237 = 5.68t - 2.84t
0.237 = 2.84t
t = 0.237 ÷ 2.84
t ≈ 0.0836 s
Now that we have the time (t), we can substitute it into the equation for acceleration (a):
a = -5.68 ÷ t
a = -5.68 ÷ 0.0836
a ≈ -67.98 m/s²
Finally, we can calculate the force using the formula:
Force = (mass × change in velocity) ÷ time
Force = (925 kg × -5.68 m/s) ÷ 0.0836 s
Force ≈ -62903.37 N (negative sign indicates the force is acting in the opposite direction)
In conclusion, the magnitude of the average force on the car's bumper that collapses 0.237 m while bringing the 925 kg car to rest from an initial speed of 5.68 m/s is approximately 62903.37 Newtons.
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HELP!!!
7. A block rests on a frictionless table on Earth. After a 20-N horizontal force is applied to the
block, it accelerates at 3.9 m/s^2.Then the block and table are carried to the moon, where the
acceleration due to gravity is 1.62 m/s^2. A horizontal force of 10 N is then applied to the block.
What is the acceleration?
A)2.0 m/s2
B)2.1 m/s2
C)1.8 m/s2
D)2.3 m/s2
E)2.5 m/s2
Answers
Problem 11.14 A woman of mass m stands at the edge of a solid cylindrical platform of mass M and radius R. At t 0, the platform is rotating with negligible friction at angular velocity wo about a vertical axis through its center, and the woman begins walking with speed v (relative to the platform) toward the center of the platform
Answers
This can be expressed as,T2 = (M + m)aT1 = Mg/2where,T2−T1= (M + m)a − Mg/2 Solving the above equations will give the value of α and then we can find out the final velocity of the platform.
Here's the solution to the given problem: Let the origin of our coordinate system be located at the center of the platform. We can assume that there is no friction between the platform and the ground. If v Rw, the woman will collide with the center of the platform after the platform stops moving because it is not able to move with the required speed to reach the center of the platform before it stops. The net torque about the origin, assuming that the angular momentum is conserved, is Iα = τ, or, assuming that the angular momentum is conserved,T2−T1=IwoR2wR2+mr2αT2 = Mg/2 + Mv/RT1 = (M + m)g/2Let a be the speed of the platform just after the woman reaches the center, which is given by a = v + αr. This can be expressed as,T2 = (M + m)aT1 = Mg/2where,T2−T1= (M + m)a − Mg/2Solving the above equations will give the value of α and then we can find out the final velocity of the platform.
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Which of the following is a chemical change?
A. Water vapor in the air turns to liquid water in the form of rain
B. The oxygen in the air forms ozone in presence of UV rays
C. Dust and soot particles being suspended in the air
D. Sulphur dioxide being released in the air
Answers
Answer:
B
Explanation:
Fill in the blanks! Please, help me ASAP
I’ll give extra points
Answers
Answer:
Please find attached the required filled diagram created with MS Visio
Explanation:
Waves → Are produced by → Vibrating molecules → Which pass energy to → neighboring molecules
Waves → Are → Repeating disturbances → That transfers → Energy → Through → Matter or Space
Waves → that need a → Medium → are called → Mechanical → And can be either → Compressional → Or → Transverse
A Ford Shleby GT 500 has a horsepower of 760 hp. What is that is Watts? DO NOT include units - just the numeric answer. I QUESTION 15 An object of mass 100 kg is moved with an acceleration of 10 m/2, and goes fron an initial position of 10 m to a final position of 30 m. What work was done on the object? DO NOT include units - just the numeric answer.
Answers
the work done on the object is 20000 J.
The conversion factor from horsepower to watts is 1 hp = 746 watts.
Therefore, the Ford Shelby GT 500's horsepower of 760 hp can be converted to watts as follows:
760 hp × 746 watts/hp = 567760 watts
To convert horsepower to watts, you simply need to multiply the number of horsepower by the conversion factor of 746 watts/hp.So, the numeric answer for 760 hp in watts is 567760.
According to the work-energy principle, the work done on an object is equal to the change in kinetic energy. Mathematically, the work-energy principle can be represented as follows:
W = ΔKHere, W represents the work done on the object, and ΔK represents the change in kinetic energy of the object.
The change in kinetic energy can be calculated using the following formula:
ΔK = (1/2)mvf² - (1/2)mvi²
Here, m represents the mass of the object, vi represents the initial velocity of the object, and vf represents the final velocity of the object. In this case, the object is initially at rest (vi = 0), so the formula can be simplified to
:ΔK = (1/2)mvf²
Now, we can use the following kinematic equation to calculate the final velocity of the object:
vf² = vi² + 2ax
Here, a represents the acceleration of the object, x represents the displacement of the object, and vi represents the initial velocity of the object. Plugging in the given values, we get:
vf² = 0 + 2(10 m/s²)(30 m - 10 m)vf² = 400 m²/s²vf = 20 m/s
Now, we can plug in the values of m and vf to calculate the change in kinetic energy:
ΔK = (1/2)(100 kg)(20 m/s)²ΔK = 20000 JSo, the numeric answer for the work done on the object is 20000 J.
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An element of atomic number 88 decays radioactively to an element of atomic number 82.
Part A
Which of the following emissions achieve this result?
Check all that apply.
a.) one alpha particle and one beta-minus particle
b.) three alpha particles
c.) one alpha particle
d.) six beta-minus particles
An element of atomic number 82 and mass number 214 decays radioactively to an element of atomic number 82 and mass number 210.
Part B
Which of the following emissions achieve this result?
Check all that apply.
a.) four beta-minus particles
b.) two beta-minus particles and one alpha particle
c.) two alpha particles
d.) one alpha particle
Answers
An element of atomic number 88 decays radioactively to an element of atomic number 82. The emissions that achieve this result is one alpha particle. The correct option is D. The emission that achieves this result is one alpha particle. The correct option is C.
To determine the emissions that achieve the radioactive decay from an element with atomic number 88 to an element with atomic number 82, we need to consider the changes in atomic number and mass number during the decay process.
In a radioactive decay, the atomic number decreases by the emission of a particle, and the mass number decreases by a specific amount as well.
Atomic number of initial element = 88
Atomic number of final element = 82
From this information, we can conclude that the decay process involves the emission of an alpha particle.
The emission of an alpha particle corresponds to the emission of a helium nucleus, which consists of two protons and two neutrons. This emission reduces the atomic number by 2 and the mass number by 4.
Therefore, the emission that achieves this result is C, one alpha particle.
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Gamma ray technology can be used to do which of the following?
A. Monitor human activity at night
B. Treat tumors in the body
C. Speed up the process of hardening paint
D. Communicate across long distances
Answers
Answer:
b
Explanation:
radiation can treat tumors.
Answer:
B. Treat tumors in the body
Explanation:
took quiz
A car is traveling over a hill that has a radius of curvature of. The car is slowing down as it goes over the hill. It slows down at a constant rate from a speed of to a speed of over a distance of ending at the top of the hill. The net acceleration of the car at the top of the hill is most nearly.
Answers
The acceleration of the car at the top of the hill is 6.6 m/s²
acceleration: the rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting.
The third kinematic equation is applied to determine the car's tangential acceleration, as illustrated below: v2 = u2 + 2as, where a represents the vehicle's acceleration.
2x50 a = -5.25 m/s²;
2as = v² - u² a
= v²-u² / 2s
a = 102 - 252
At the summit of the hill, the car's centripetal acceleration is given as ac=v²/r
ac=10²/25
ac=4 m/s2.
At the summit of the hill, the car's net acceleration is computed as follows: a net = a2 + ac
a net = (-5.25)2 + 42
a net = 6.6 m/s2.
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Complete Question -
A 1600 kg car is traveling over a hill that has a radius of curvature of 25 m. The car is slowing down as it goes over the hill. It slows down at a constant rate from a speed of 25 m/s to a speed of 10 m/s over a distance of 50 m ending at the top of the hill. The net acceleration of the car at the top of the hill is most nearly
consider a projectile fired vertically in a constant gravitational field. for the same initial velocities, find the times required for the projectile to reach its maximum height (a) with no resisting force and (b) for a resisting force proportional to the instantaneous velocity of the projectile. (c) show that the result in (a) can be recovered from the result in (b).
Answers
Compare the amount of time needed is for projectile to go from its initial velocity to its highest point. (A) for a resistive force of zero.
What types of things are velocities?A number called velocity describes the speed and direction of a point's motion. Because it has both direction and magnitude, velocity is referred to as a linear momentum and cannot be fully expressed in numerical terms, unlike time or length, that are scalar numbers.
How is speed measured?According to the equation v = s/t, velocity (v) is indeed a vector quantity which quantifies displacement (and change in position, s), over change in time (t).
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What is the impact force on a 0.5 kg object if it falls 3 meters and hits a carpeted floor at 8 m/s, stopping in 0.10 seconds?
Answers
the I'm pact force of 0.5 is lol u guys go and study why r u asking answers
If a train approaches you (sitting in the bench ) at a velocity of 35 m/s, what frequency will you hear as it sounds its whistle at 188 Hz? speed of sound= 345 m/sA) 188 HzB) 170.7 HzC) 209.2 HzD) 202.7 Hz
Answers
Given:
The speed of the train is,
\(v_s=35\text{ m/s}\)The actual frequency of the whistle is,
\(f=188\text{ Hz}\)The speed of sound in air is,
\(v=345\text{ m/s}\)To find:
The frequency heard by the observer
Explanation:
The apparent frequency when the train approaches the observer is given by,
\(\begin{gathered} f_{apparent}=f\frac{v}{v-v_s} \\ =188\times\frac{345}{345-35} \\ =188\times\frac{345}{310} \\ =209.2\text{ Hz} \end{gathered}\)Hence, the frequency heard by you is 209.2 Hz.
Either funding for nuclear fusion will be cut or if significantly high temperatures are achieved in the laboratory, nuclear fusion will become a reality. Either the supply of hydrogen fuel is limited, or if nuclear fusion becomes a reality, the world's energy problems will be solved. Funding for nuclear fusion will not be cut. Furthermore, the supply of hydrogen fuel is not limited. Therefore, if sufficiently high temperatures are achieved in the laboratory, the world's energy problems will be solved. (C,H,R, S, E)
1. C∨(H>R)
2. S∨(R>E)
3∼C
4∼S /H>E
Answers
if sufficiently high temperatures (R) are achieved in the laboratory, nuclear fusion (S) becomes a reality, and as a result, the world's energy problems (E) will be solved.
How do we explain?C= Funding for nuclear fusion will be cut.
H = Supply of hydrogen fuel is limited.
R = Sufficiently high temperatures are achieved in the laboratory.
S = Nuclear fusion becomes a reality.
E = World's energy problems are solved.
We then represent the statements as:
C ∨ (H > R) (Either funding for nuclear fusion will be cut or if the supply of hydrogen fuel is limited, sufficiently high temperatures will be achieved in the laboratory.)S ∨ (R > E) (Either nuclear fusion becomes a reality or if sufficiently high temperatures are achieved in the laboratory, the world's energy problems will be solved.)C (Funding for nuclear fusion will not be cut.)S / H > E (Nuclear fusion will not become a reality, or if the supply of hydrogen fuel is limited, the world's energy problems will be solved.)Learn more about Nuclear fusion at:
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If Europium (Eu) undergoes proton decay and loses 3 protons, which element will it become?
Answers
Answer:
Neodymium (Nd)
Explanation:
An element is made up of atom, which contains three subatomic particles namely; proton, electron, and neutron. In a neutral atom, the number of protons determines the atomic number of that element and the atomic number of an element is the identity of that element in the periodic table.
Hence, a change in the proton number of an element means a change in the atomic number and ultimately a change of that element. In this question, Europium (Eu) element with atomic number, 63, loses three protons. This means that that atom now has 60 protons, which denotes the atomic number of another element called Neodymium (Nd).
Therefore, Europium (Eu) element has become Neodymium (Nd) due to loss of protons.
fill in the blanks
11) Stored energy is called ________ energy.
12) When you move your hand or foot, your body has converted potential energy into ________ energy.
13) When coasting while roller skating, you eventually stop due to ________.
14) A ball has 100 J of potential energy when it is on a shelf. The kinetic energy of the ball the instant it hits the floor is ________J.
Answers
An ideal gas undergoes isothermal compression, which reduces its volume by 1800 m3. The final pressure and volume of the gas are 1477.5 torr bar and 2140 cm3, respectively. Calculate the original pressure of the gas in (a) torr, (b) Pa.
Answers
The original pressure of the gas is approximately 1.758 torr.
To calculate the original pressure, we use Boyle's Law equation, which states that the product of initial pressure and volume is equal to the product of final pressure and volume for an isothermal process. By rearranging the equation and substituting the given values, we can solve for the original pressure. The result is approximately 1.758 torr.
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A figure skater begins spinning counterclockwise at an angular speed of 4.1 π rad/s. During a 4.5 s interval, she slowly pulls her arms
inward and finally spins at 7.1 π rad/s.
What is her average angular acceleration
during this time interval?
Answer in units of rad/s^2.
Answers
The average angular acceleration of the skater is 2.1 rad/s².
What is the average angular acceleration of the skater?
The average angular acceleration of the skater is calculated by applying the following formula.
a = Δω / Δt
where;
Δω is change in angular speedΔt is change in time of motiona = ( ω₂- ω₁ ) / ( t₂ - t₁ )
where;
ω₁ is the initial angular speedω₂ is the final angular speedt₁ is initial timet₂ is final timea = ( 7.1π - 4.1π ) / ( 4.5 )
a = 2.1 rad/s²
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what matches ????????????????
Answers
Answer:
1st: Radiation
2nd: Conduction
3rd: Convection
Explanation:
I actually learned this before in school. Yay
Restate Newton’s third law of motion.
Answers
Answer:
The force exerted by one source object on another target object always creates another force at the target object that pushes back on the source object with the same ... or His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A.
You and your friend each drive 50.0 km.
You travel at 90.0 km/hr. Your friend travels at 105 km/hr.
For how many minutes will your friend be waiting for you at the end of the trip?
Round your answer to the nearest minute.
Answers
Answer:
Friend will wait 5 minutes
Answer:
you're Friend will wait 5 minutes
¿Cómo
se
ajosta
o pondero un error de medicion?
Answers
Answer:
sorry do not speak Spanish so I would not be able to help you probably cannot read this but I would be happy to help you if you follow me and bake English so thank you
1. You and your forensics team are working a crime scene of a 19 year-old female who was found in the woods behind
the local hospital. She is found lying on her torso (face down), but lividity is present on the dorsal (back) side of the
victim.
What can you conclude about the victim/situation?
Answers
Answer:
You could conclude the 2nd fact
Explanation:
The conclusion will be that she died before 4-5 hours and she has been poisoned.
What will be the conclusion?It is found that the 19 years old female was found in the woods and she finds lying her face down and also the lividity is present on the backside of the woman.
First of all, we will understand what is lividity. Lividity is the process in which the color of the body changes and it starts after 1-4 hours of death.
lividity occurs when the blood does not pump the blood in the body and the blood is collected to the particular area where the gravity is acting.
If the body is found face down with signs of blanching on its back, it suggests to forensic scientists that the individual had likely died on their back and been moved.
If the body color changes to red cherry then it can be predicted that the individual died from carbon mono oxide poisoning
If the body color changes to pink it can be due to cyanide poisoning.
Thus the conclusion will be that she died before 4-5 hours and she has been poisoned.
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No two electrons in an atom can have the same four quantum numbers. This is a statement attributed to.
Answers
No two electrons in an atom can have identical four quantum numbers. This is a statement that is attributed to the Pauli Exclusion Principle.
It states that in an atom or molecule, no two electrons can possess the same four electronic quantum numbers. As an orbital can accommodate a maximum of only two electrons, the two electrons must have opposite spins. This means if one electron is allotted a spin-up electron, the other electron must be a spin-down electron.
The adequacy of an orbital to accommodate electrons is decided by Pauli's exclusion principle. According to this principle, for an electron belonging to the same orbital, the spin quantum number must be different since the other three quantum numbers are the same.
The spin quantum number can have two values: +1/2 and -1/2.
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Please use this screenshot in any way you can
