in the ground state of hydrogen, the uncertainty in the position of the electron is roughly 0.11 nm.. If the speed of the electron is approximately the same as the uncertainty in its speed, about how fast is it moving
Answers
Therefore, the electron in the ground state of hydrogen is moving at approximately 5.26 million meters per second. This is an extremely high speed, which is not unexpected given that the electron is in its lowest energy state and is therefore tightly bound to the nucleus.
The uncertainty principle states that it is impossible to simultaneously measure the exact position and momentum of a particle with complete accuracy. It is represented by the following equation:
ΔxΔp ≥ h/4π,
where Δx is the uncertainty in position, Δp is the uncertainty in momentum, and h is Planck's constant.
In the ground state of hydrogen, the uncertainty in the position of the electron is roughly 0.11 nm. If the speed of the electron is approximately the same as the uncertainty in its speed, then we can calculate its speed using the uncertainty principle. We can assume that the uncertainty in momentum is roughly equal to the uncertainty in speed (since momentum = mass × velocity).
Therefore,
Δp = mΔv ≈ mΔspeed,
where m is the mass of the electron. We can rearrange the uncertainty principle equation to solve for
Δp:Δp ≥ h/4πΔx
Substituting the values we know, we get:
Δp ≥ (6.626 × 10^-34 J s)/(4π × 0.11 × 10^-9 m)Δp ≥ 4.79 × 10^-24 kg m/s
Now we can solve for the speed using the equation
:Δp ≈ mΔspeedΔspeed ≈ Δp/m
Substituting the values we know:
Δspeed ≈ (4.79 × 10^-24 kg m/s)/(9.11 × 10^-31 kg)
Δspeed ≈ 5.26 × 10^6 m/s
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Related Questions
A rod is made up of copper and wood joined together.
After the rod is heated at the join in the centre for about a minute, where would the lowest temperature be?
Answers
my views
Explanation:
Figure (8) shows a rod made up of copper and wood joined together. The rod is heated at the joint in the centre for about a minute. At which point – A, B, C or D, would it show the lowest temperature? PLEASE GIVE REASONS ALSO(MINIMUM 2)
blank is a wave that remains in a constant position
Answers
A wave that remains in a constant position is referred to as a stationary wave or a standing wave.
It is formed by the superposition of two waves with the same frequency and amplitude traveling in opposite directions. Unlike a traveling wave that moves through space, a standing wave appears to be stationary because the wave peaks and troughs oscillate in place.
The formation of a standing wave occurs when a wave reflects back upon itself, interacting constructively and destructively with the incoming wave. This phenomenon is characterized by the presence of nodes and antinodes. Nodes are points along the wave where the amplitude is always zero, resulting from destructive interference between the two waves. Antinodes, on the other hand, are points of maximum displacement, created by constructive interference..
Standing waves have significant implications in various fields of study. In physics and engineering, they are essential in the analysis of acoustics, optics, and electromagnetic fields. They find applications in musical instruments, where standing waves inside the instrument's resonating body create distinct harmonics and produce specific musical tones.
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Pulling a block up a ramp
Answers
Answer:
Motion on an incline plane
Explanation:
A number of forces are acting on the box, including both gravity and friction, and you need to take both into account. There’s also the force exerted upon the box as you push it up the ramp.
9. What is the volume of an object that has a mass of 15.0 grams and a density of 1.4 g/mL?
Answers
Answer:
10.71 mL
Explanation:
We know,
=> density= mass/volume
=> 1.4 = 15 / Volume
=> volume= 15/1.4 mL
=> volume= 10.71 mL
What does a capacitance-type fuel quantity system measure fuel in?
Answers
A capacitance-type fuel quantity system measures fuel in terms of capacitance, which is the ability of a material to store an electrical charge.
The system uses probes or sensors in the fuel tanks that create a varying electrical field around them. As fuel is added or removed from the tank, the capacitance changes and the system measures this change to determine the amount of fuel remaining in the tank.
A capacitance-type fuel quantity system measures fuel in an aircraft's fuel tank based on the change in capacitance. Here's a step-by-step explanation:
1. Capacitance is the ability of a component to store electrical energy in an electric field.
2. A capacitance-type fuel quantity system consists of a capacitor with plates submerged in the fuel tank.
3. As the fuel level changes, the dielectric constant between the plates also changes, affecting the capacitance.
4. The system measures the change in capacitance and converts it to an accurate reading of fuel quantity in the tank.
In summary, A capacitance-type fuel quantity system measures fuel based on the change in capacitance caused by the fuel level variation in the tank.
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Why do scientists interested in Earth’s magnetic field collect cores from rocks at the Mid-Atlantic Ridge?
Answers
Ocean drilling cores have been used to confirm the age of the oldest oceanic crust, which was formed about missing years ago.
What is magnetic field ?An electric charge, an electric current, and magnetic materials are all affected magnetically by a magnetic field, which is a vector field. A force perpendicular to the magnetic field and its own velocity acts on a moving charge in a magnetic field.
Because it shields the planet from dangerous radiations such solar winds, which have high radiation levels, the magnetic field of the Earth is crucial. The sun's solar energy includes solar winds.
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PLEASE HELP!!!!
What is the velocity of the object at the
following times? Be sure to include direction.
(a) t=1.0s
(b) t=40s
(c) t=
6.0 s
Answers
Relation between velocity and time
\(\\ \sf\Rrightarrow Velocity=\dfrac{Displacement}{Time}\)
Or
\(\\ \sf\Rrightarrow \vec{v}=\dfrac{dx}{dt}\)
Now
\(\\ \sf\Rrightarrow v\propto \dfrac{1}{t}\)
Which of the following equations illustrates the law of conservation of
matter?
A. 4A1 + 302 → 2A1203
B. 4A1 + O2 → 2A1203
C. 2A1 + 02 → A1203
D. 2A1 + 302 → Al2O3
Answers
Freeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
(ignore pics)
Answers
Answer:
Thank you!
Explanation:
if the wide flange beam is subjected to a shear of v=30 kN, determine the shear force resisted by the web. set w=200 mm.
Answers
The shear force resisted by the web of the wide flange beam can be determined by dividing 20 kN by the web thickness (t), which can be calculated based on the specific dimensions and properties of the beam.
To determine the shear force resisted by the web of a wide flange beam subjected to a shear of v=30 kN and with a web width of w=200 mm, we can use the following formula:
V = (2/3) × Fv × t × w
Where:
V = Shear force resisted by the web
Fv = Shear stress in the web
t = Web thickness
First, we need to find the shear stress in the web, which can be calculated using:
Fv = V / (t × w)
Substituting the given values, we get:
Fv = 30 kN / (t × 200 mm)
Next, we can substitute this value of Fv in the first equation to find the shear force resisted by the web:
V = (2/3) × Fv × t × w
V = (2/3) × (30 kN / (t × 200 mm)) × t × 200 mm
Simplifying, we get:
V = (20 kN) / t
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Dr. Amari is investigating whether automobile accidents in her city increase, decrease, or stay the same 24 hours after daylight savings (this is when the time changes to one hour earlier). She looks up public records at the police station and documents any accidents and notes the dates and times.
Dr. Amari discovers a trend. She finds that accidents do seem to increase right after clocks are reset to an hour earlier.
Which one of the following research techniques is Dr. Amari using?
A. naturalistic observational research
B. archival research
C. experimental research
D. survey research
Answers
Since Dr. Amari finds that accidents do seem to increase right after clocks are reset to an hour earlier. The research techniques that Dr. Amari using is B. archival research.
What is archival research?Archival research is any investigation that looks for, locates, and extracts data and proof from original archives. Archives are documents, records, and other sources pertaining to the actions and claims of people, groups, or both that are historical and not current.
Note that The term "data collection techniques" refers to procedures for gathering and analyzing various types of data. Examining papers pertaining to a topic, as well as conducting interviews and observations, are common methods of gathering data.
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what are the factors of evaporation and give explanation
Answers
Answer:
The three primaryfactors of evaporation are heat, atmospheric pressure (which determines the percentage of moisture) and the movementofair. At the molecular level, there is no strict boundary between the liquid state and the vapor state
WILL UPVOTE [50 POINTS]
HELP NOW AND PLEASE TRY TO BE RIGHT I WANT EFFORT!
1. Suppose you are building a scale model where 1 cm on the model represents 20 km in real life. The scale of this model is 20 km/cm. If an object is 80 km long in real life, how would it have to appear in the model?
2. Suppose you are building a scale model where 1 cm on the model represents 50 km in real life. The scale of this model is 50 km/cm. If an object is 5 cm long in real life?
3. Suppose you are building a scale model where a 2cm-diameter ball represents a planet that is 84,000 km diameter in real life. If you want to represent a new planet that is 63,000 km in diameter in the same scale model, what diameter ball would you use to represent the new planet?
a. The scale of the model is ____
b. The diameter of the ball representing the new planet would be...
c. On this model a 10cm diameter ball would represent a planet with what diameter?
Answers
1. If an object is 80 km long in real life, it would have to appear 4cm in the model.
2. If an object is 5 cm long in the model, it would have to appear 250 km in real life.
3a. The scale of the model is 48000 km/cm
b. The diameter of the ball representing the new planet would be 1.3125 cm
c. In this model, a 10cm diameter ball would represent a planet with 480,000 km diameter.
What are scientific models?A scientific model is a depiction of a set of concepts, events, or processes that is physical, mathematical, conceptual, or both.
Based on the scale of the given models:
1. An object that is 80 km long in real life, would have to appear:
Size of model = 80 km * 20 km/cm
Size of model = 4 cm
2. If an object is 5 cm long in the model:
Its size in real life = 5cm * 50 km/cm
Its size in real life = 250 km
3a. The scale of the model = 84000 km/ 2 cm
The scale of the model = 48000 km/cm
b. The diameter of the ball representing the new planet = 63000 km / 48000 km/cm
The diameter of the ball representing the new planet = 1.3125 cm
c. A 10cm diameter ball would represent a planet with a diameter = 48000 km/cm * 10 cm
Diameter of the planet = 480,000 km
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the wires are fused together end-to-end to form a single wire. a potential difference is applied to the ends of the wire by a battery so that current flows along the wire. what is the ratio of the electron drift velocity between the two metals, reported as
Answers
The ratio of the electron drift velocity between the two metals is \($\frac{v_{d1}}{v_{d2}}=\frac{1}{6}$\).
Current is the flow of charge. The direction of flow of the positive charge is in the opposite direction to the flow of electrons. Electrons flow from negative to positive terminals. Electrons moving at the same speed constitute an electrical current.
The relation between electric current, drift velocity, and charge is given by the formula I = neAvd. Where:
I is the current flowing in the wire, A is the cross-sectional area of the wire, n is the electron density, e is the charge on an electron, and vd is the electron drift velocity.Since the current in the wire is the same everywhere, the cross-sectional area of the wire is also the same everywhere, and we can write: n1e1v1 = n2e2v2Since the wire is made up of two metals, v1 and v2 refer to the drift velocities of the electrons in each metal. Since the two metals are fused end-to-end, they have the same length, L, and the same potential difference, V. Hence, the electric field in each metal is the same, and we can write:E = V/L = j/ne1e. Where j is the current density, which is the current per unit cross-sectional area of the wire.
Hence, the ratio of the electron drift velocity between the two metals is given by: \($\frac{v_{d1}}{v_{d2}}=\frac{1}{6}$\) = \($\frac{6}{1}$\).
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the particle has momentum of magnitude p1 at a certain instant. what is p2 , the magnitude of its momentum δt seconds later? express your answer in terms of any or all of p1 , m , f , and δt .
Answers
Seconds later, the amplitude of its momentum, p2, is equal to p1 + (F * Delta t).
What definition of momentum is most precise?A characteristic of an object in motion that it possesses as a result of its mass and motion and which, generally speaking, equals the product of the object's mass and velocity: a feature of an object in motion that determines how long it will take to bring it to rest when subjected to a constant force.
When a certain force is applied for a certain amount of time, a mass's velocity changes.
The following equation expresses this:
Eq. 1: Mass * Force * Time (Final velocity – Initial velocity)
Mass times speed equals momentum.
Eq. 2: Mass * Change in momentum (Final velocity – Initial velocity)
Set Eq1 = Eq2
Force x Time Equals Momentum Change
Equation 3: Final momentum - Initial momentum = Force * time
a mass m particle traveling along the x axis
The particle is being affected by the net force F along the x axis.
A constant force is F.
Eq. 1: Mass * Force * Time (Final velocity – Initial velocity)
Delta t = m * = F (Final velocity – Initial velocity)
Equation 3: Final momentum - Initial momentum = Force * time
p2 = p1 + (F * Delta t) = p2 - p1
Seconds later, the amplitude of its momentum, p2, is equal to p1 + (F * Delta t).
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c) Name the type of error described in the two cases of measurements below. Case 1: A stopwatch that runs fast or slow. Case 2:
Answers
The description of the measurement is incomplete, and therefore it is impossible to determine the type of error.
What is Measurement?
Measurement is the process of quantifying or determining the size, amount, or degree of something using standard units or scales. It involves assigning a numerical value to a physical quantity, property, or characteristic of an object, event, or phenomenon.
Measurement is a fundamental tool used in science, engineering, commerce, and everyday life. It allows us to make comparisons, establish standards, and assess the accuracy and precision of our observations and experiments. Some common examples of measurements include length, mass, time, and volume, which are typically expressed in units such as meters, kilograms, seconds, degrees Celsius, and liters, respectively.
The error described in this case is systematic error, also known as a bias. The stopwatch consistently measures time intervals that are either longer or shorter than the actual time.
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A kayak took 5 hours to finish its trip on a river.If it traveled at an average speed of 18mph (mile per hour),What was the distance of the trip
Answers
A loop of wire is placed in a uniform magnetic field. For what orientation of the loop is the magnetic flux a maximum? for what orientation is the flux zero?.
Answers
The correct answer is a) magnetic flux is maximum when the plane of the loop is parallel to the magnetic field. B) magnetic flux is zero, when the plane of the loop is perpendicular to the magnetic field.
What is uniform magnetic field?
The field lines must be both parallel and equally spaced in order for the region under examination to have a uniform magnetic field, which must have the same strength and direction throughout.
Hence the loop's plane is parallel to the magnetic field when the magnetic flux is at its highest (answer a). When the plane of the loop is parallel to the magnetic field, the magnetic flux is zero. (answer b)
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Which diagram best shows the results of removing heat from the original sample until it freezes?
Answers
Answer:
b
Explanation:
the closest molecules are in b witch would be a solid
Ammonium sulfate is added to barium hydroxide, forming ammonium hydroxide and barium sulfate. the equation is written in the correct order and balanced, the correct coefficients are:
Answers
The balanced equation for the reaction between ammonium sulfate (NH₄)₂SO₄ and barium hydroxide Ba(OH)₂, forming ammonium hydroxide NH₄OH and barium sulfate BaSO₄, is:
(NH₄)₂SO₄ + Ba(OH)₂ -> 2NH₄OH + BaSO₄
This equation forms barium hydroxide and ammonium sulphate. The balanced equation coefficients show the reactant-product stoichiometry.
The equation demonstrates that 1 mole of ammonium sulphate and 1 mole of barium hydroxide yield 2 moles of each. This balanced equation ensures mass conservation by having the same number of atoms of each element on both sides.
Balancing the equation clarifies the chemical reaction's reactants and products. It improves reaction stoichiometry and quantity calculations.
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A car is running uniformly with the velocity of 72km/h3, what is its acceleration?
Answers
Answer: a =0
Explanation:
Katy slows from 6.7 m/s to 2.3 m/s in 2.2 seconds. What is her acceleration?
Answers
Katy slows from 6.7 m/s to 2.3 m/s in 2.2 seconds. The acceleration will be 2 \(m/s^{2}\)
initial speed = 6.7 m/s
final speed = 2.3 m/s
time = 2.2 seconds
acceleration = change in speed / time interval
= 2.3 - 6.7 / 2.2
= -2 \(m/s^{2}\)
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3 points
A science teacher is going to make a Newton's Cradle using students on
swings. *
A
B C
Which of the following statements is true?
Answers
Answer:
When a ball on one end of the cradle is pulled away from the others and then released, it strikes the next ball in the cradle, which remains.
So it will be D
Explanation: Hope this helps :)
HELPPPPPPPPPPP PLEASEEEEEEEEEEE
Complete this sentence. The solubility of a sample will ____________ when the size of the sample increases.
stay the same
decrease
increase
be unable to be determined
the answer is not decrease
Answers
The solubility of the sample will decrease
reselasie3. An object of mass 900 kg is hanging from a ceilingby means of two strings. The first string (7₁) makes anangle of 40 degree with the horizontal-right. The second string(T₂) makes an angle of 20 degree with the horizontal-left.Calculate the tension in the first string (7₁) (2 point)A. O12034.001 NB. O14675.062 NC. 5790.32 ND. 09570.261 NE. 13316.872 N
Answers
First, find the weight of the object.
W = m g = 900 x 9.8 = 8,820 N
T2x = -t2 cos 20
t1 x = t1cos 40
mgx= 0
T2y= t2 sin 20
t1y= t1 sin 40
mgy= - mg
X and y components of resultant (R)
Rx = t1x -t2x + mgx
Rx= -t2 cos 20 + t1cos 40 (3)
Ry = t2 sin 20 + t1 sin 40 - mg(2)
Rx, and Ry = 0
0 = -t2 cos 20 + t1cos 40 (3)
0= t2 sin 20 + t1 sin 40 - mg (4)
Solve (3)
0 = -t2 cos 20 + t1cos 40
t2 cos 20 = t1 cos 40
t2 = t1 cos40/cos20
t2 = 0.815 t1
Substitute t2 in 4
0 = t2 sin 20 + t1 sin 40 - mg
0 = (0.815 t1) sin 20 + t1 sin 40 - 8,820
0= t1 ( 0.815 sin 20 + sin 40 ) -8820
0 = 0.921 t1 -8820
8820 = .921 t1
t1 = 8820/0.921
t1= 9570.261N (option D)
Lines e and f are parallel. the mangle9 = 80° and mangle5 = 55°. parallel lines e and f are cut by transversal c and d. all angles are described clockwise, from uppercase left. where lines e and c intersect, the angles are: 1, 2, 4, 3. where lines f and c intersect, the angles are 5, 6, 8, 7. where lines e and d intersect, the angles are 9, 10, 12, 11. where lines f and d intersect, the angles are 13, 14, 16, 15. which angle measures are correct? select three options. mangle2 = 125° mangle3 = 55° mangle8= 55° mangle12 = 100° mangle14 = 100°
Answers
We can use the properties of parallel lines and transversals to determine the measures of the angles.
From the given information, we know that lines e and f are parallel, and the angles 9 and 80° form a linear pair, which means that angle 9 measures 180° - 80° = 100°.
Similarly, angle 5 and 55° form a linear pair, so angle 5 measures 180° - 55° = 125°.
Using the alternate interior angles property, we know that angles 3 and 8 are congruent, and both are equal to angle 5 - angle 4 = 125° - 80° = 45°. Therefore, option (ii) is incorrect.
Using the corresponding angles property, we know that angles 12 and 6 are congruent, and both are equal to angle 9 + angle 80° = 100° + 80° = 180°. Therefore, option (iv) is correct.
Using the vertical angles property, we know that angles 14 and 2 are congruent, and both are equal to angle 80°. Therefore, option (v) is correct.
Therefore, the correct options are (i) mangle2 = 125°, (iv) mangle12 = 100°, and (v) mangle14 = 100°.
What volume of silver metal will have a mass of exactly 2500.0 g? The density of silver is 10.50 g/cm3.
*Include your units!
Round your answer to the nearest tenth.
Answers
Explanation:
The density of silver is 10.5g/cm3
=2500.0g/10.5g/cm3
=238.09cm3
238.1cm3 to nearest tenth.
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Write an equation that expresses the first law of thermodynamics in terms of heat and work.
Answers
Answer:
Heat Input = Work Output (at 100% efficiency)
ΔQ = ΔW
(you cannot get something for nothing)
a 3-kg book is held at rest against a wall by a 120 n push force. the coefficient of static friction is 0.50. how big is the friction force of the wall on the book? (use g = 10 m/s2 )
Answers
Since the book is held at rest, the push force of 120 N applied to the book is balanced by the friction force of the wall on the book. Therefore, the friction force of the wall on the book is equal to 120 N - 15 N = 105 N.
The friction force is the force that opposes motion between two surfaces in contact. In this case, the friction force of the wall on the book prevents the book from sliding down. The coefficient of static friction is the ratio of the maximum frictional force to the normal force between the two surfaces.
To find the friction force of the wall on the book, we first need to calculate the maximum frictional force using the coefficient of static friction. The normal force between the book and the wall is equal to the weight of the book, which is 3 kg x 10 m/s^2 = 30 N. Therefore, the maximum frictional force is 0.50 x 30 N = 15 N.
Since the book is held at rest, the push force of 120 N applied to the book is balanced by the friction force of the wall on the book. Therefore, the friction force of the wall on the book is equal to 120 N - 15 N = 105 N.
In summary, the friction force of the wall on the book is 105 N.
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Explain why using a ladder or plank will help to prevent damage to the
roof.
Answers
Answer:
it reduces pressure
Explanation:
use of ladder / plank makes the pressure applied to uniformly distributed to all part hence increase surface area