(a) over the distance of 150.8 cm on the surface of the water, the group of waves extends.
(b) an observer counts 12 wave crests in the group. the precision with which the wavelength can be determined is 0.112 cm
We are provided with the time taken which is 5.2 s and the wave speed which is 29 cm/s. Since distance , d = velocity * time
= 29 cm/s * 5.2 s = 150.8 cm
For the second part, λ=d / N, where λ is the wavelength and N is the number of wave crest
so λ= 150.8 /12 = 12.56 = 13 cm
so Δ λ =ε λ²/ d
here ε = 0.1
so Δλ = 0.1*13²/150.8 = 0.112 cm
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what is the resistance of the third resistor? express your answer to two significant figures and include the appropriate units.
Total resistance of resistors is sum of all resistors.
Total resistance in series is R1 + R2 + R3.
Total resistance in parallel is 1/R1 + 1/R2 + 1/R3.
Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega.
An easier way to explain resistance is to consider an example of a person in a crowded market struggling to go from one shop to another. This situation is certainly similar to an electron trying to make its way through a wire.
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if the crate was at rest at the top of the incline and has a speed of 2.80 m/s at the bottom, how much work wf was done on the crate by friction? use 9.81 m/s2 for the acceleration due to gravity and express your answer in joules.
The Frictional Work output on crate is 27.468 J.
When the body is moved in the direction of the force, frictional force will produce positive work. Think of two blocks that are stacked on top of one another. A frictional force between the two blocks prevents the two blocks from sliding if the lower block begins to move slowly in one direction. In the same direction that the lower block is moving, this force acts on the upper block. Friction in this situation therefore produces positive work.Friction can actually do more harm than good. For instance, when a block is sliding over a rough surface, the frictional force acts in the opposite direction from the block's motion and attempts to stop it. The direction of the block's motion and the direction of the frictional force being in opposition to one another, the work done by friction is negative.V=2.80m/s W= VgtanxW= 2.80 x 9.81 x tan90W=27.468 JThe work done on crate by friction is 27.468 J.To study about Work output-
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as the current in the wire increases, the magnetic field around the wire increases in magnitude without changing its direction. does this affect the flux through the loop, and if so, how?
The area around a magnetic body or moving charge on which a magnetic force acts. When the magnetic field changes with time, an electric field is induced in the closed loop.
According to Faraday's law, the EMF is induced in the coil when the magnetic field, area and angle change.
Flow rate can be expressed as the flow rate of liquid, radiant energy, or particles in a given area.
Flux is the scalar product of the magnetic field in the region
Ф = ∫ B. dA
where B is the magnetic field and A is the area
Let's look at the factors that influence the flow at rest
The value of the magnetic field varies either in time or space
Wax area changes and the arc fits in the size
angle between the magnetic field and the surface changes
Flux is an analysis of the total magnetic field traveling within a given magnetic field.
Magnetic flux is what creates a magnetic field around a magnetic body.
The SI unit of magnetic flux is Weber.
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A ball is thrown vertically upward with an initial velocity of 29. 4 meters per second. What is the maximum height reached by the ball? [neglect friction. ].
Answer:
44 m
Explanation:
vf = velocity at highest point = 0
vf = vo + at
0 = 29.4 + (-9.81 )t shows t = ~ 3 s
d = vo t + 1/2 a t^2
d = 29.4 ( 3) + 1/2 ( -9.81)(3^2 ) = 44 m
the ability of the atmospheric pressure hypothesis to link the behavior of barometers with the behavior of siphons and vacuum pumps is an illustration of:
The ability of the atmospheric pressure hypothesis to link the behavior of barometers with the behavior of siphons and vacuum pumps is an illustration of Internal coherence.
Atmospheric pressure is nothing but the force exerted on a surface by the air above it as gravity pulls it to Earth. Atmospheric pressure is commonly measured with a barometer. At sea level has a mean value of 101,325 pascals (roughly 14.6959 pounds per square inch).
Coherent is nothing but if there are two source and if their frequency and waveform are identical then they are coherent.
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a 8-kg object moves down vertically a distance of 3 m. its potential energy has changed by approximately how much?
A 8-kg object moves down vertically a distance of 3 m. its potential energy has changed by approximately it has increased by 24 J.
What is Potential Energy?
An item may store energy according to its location, as we all know.In the instance of a bow and arrow, the bow stores some energy as it is drawn, and this energy is what gives the arrow its kinetic energy when it is released.Similar to this, a spring accumulates energy as it is moved away from its equilibrium state, which we can notice by the tension our hands experience when we stretch it. Potential energy is a type of energy that is created when anything changes position or condition.However, Let's study the definition of potential energy and its formula before moving on to instances and the potential energy unit.
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Electronic relaxation, the change in molecular electronic structure as a response to oxidation, is investigated in [FeX4]2-,1- (X = Cl, SR) model complexes. Photoelectron spectroscopy, in conjunction with density functional methods, is used to define and evaluate the core and valence electronic relaxation upon ionization of [FeX4]2-. The presence of intense yet formally forbidden charge-transfer satellite peaks in the PES data is a direct reflection of electronic relaxation. The phenomenon is evaluated as a function of charge redistribution at the metal center (Δqrlx) resulting from changes in the electronic structure.
It is found that electronic relaxation is very large for both core (Fe 2p) and valence (Fe 3d) ionization processes and that it is greater in [Fe(SR)4]2- than in [FeCl4]2-.
What is Photoelectron spectroscopy?When attempting to ascertain the various positions of an electron within an atom, the term "photoelectron spectroscopy" refers to a specific sort of spectroscopic technique. Because of this, when examining the valence shell, it is necessary to consider the electron's ionisation energy.By measuring the relative energy of electrons in atoms and molecules, the experimental method of photoelectron spectroscopy (PES) is used. PES is frequently used by scientists to examine the atomic structure of materials or to describe molecular bonding.UV photoelectron spectroscopy (UPS) and X-ray photoelectron spectroscopy are typically used as the field's two arbitrary classifications (XPS). The names are based on the energy of the photons that were used in that specific spectroscopy.To learn more about Photoelectron spectroscopy refer to:
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the passanger liners Carnival Destiny and Grand Princess, built recently, have a mass of about 1.0x10^8 kg each. How far apart must these two ships be to exert a gravitational attraction of 1.0x10^-3 N on each other?
The correct answer is two ships are at distance of 2.6 Km.
What does gravity mean?
The force of attraction between any two bodies is directly proportional to the product of their masses and is inversely proportional to the square of the distance between them, according to Newton's universal law of gravitation.
Given, m1=m2=1.0 ×10^8kg
Fg=1.0 ×10^−3N
G=6.673 ×10^−11(N•m2 / kg ²) (We all know)
Gravitational Force, F = G × [M1M2]/r2
Putting all the above data in our formula
r= √(Gm_1m_2/ Fg )
Distance = 2.6 x 10^4 m = 2.6 Km.
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at an instant when the induced current in the circuit is counterclockwise and equal to 1.73 a , what is the magnitude of the velocity of the bar?
The magnitude of the velocity of the bar at an instant when the induced current in the circuit is counterclockwise and equal to 1.73 A is 24.62 m / s
I = B l v / R
I = Induced current
B = Magnetic field
l = Length of bar
v = Velocity
R = Resistance
I = 1.73 A
B = 1.34 T
l = 0.293 m
R = 5.55 Ω
v = I R / B l
v = ( 1.73 * 5.55 ) / ( 1.34 * 0.293 )
v = 9.6 / 0.39
v = 24.62 m / s
Therefore, the the magnitude of the velocity of the bar is 24.62 m / s
The given question is incomplete. The complete question is :
A 0.293m -long bar moves on parallel rails that are connected through a 5.55 Ω resistor, as shown in the following figure (Figure 1) , so the apparatus makes a complete circuit. You can ignore the resistance of the bar and rails. The circuit is in a uniform magnetic field 1.34T that is directed into the plane of the figure. At an instant when the induced current in the circuit is counterclockwise and equal to 1.73 A, what is the magnitude of the velocity of the bar?
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a spring is compressed 5.0 cmcm. part a how far must you compress a spring with twice the spring constant to store the same amount of energy?
To find the springs compression, calculate the compression.
What is compression?
compression is the term for the reduction in volume of any item or material brought on by stress. Solids, liquids, gases, and living systems can all experience compression.
What is the purpose of a compression spring?
Automotive compression spring applications include springs in the seats that conform to the body and improve comfort, springs in the suspension that soften the impact of the road as the car travels, and even springs that support the automotive hoses.
The distance by which you compress a spring with twice the spring constant to store the same amount of energy is; 0.7071 times the initial distance of compression.
Therefore, the spring constant is store the same amount of energy is; 0.7071 times the initial distance of compression.
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The light given off from a candle is which method of heat transfer
Convective heat transmission creates the thermal plume of the candle. The main method of heat energy transport in a home or structure is convection.
What is Principles for Heat Transfer?Three processes—conduction, radiation, and convection—transfer heat from and to objects, including you and your house. Heat transfers through solid materials by conduction. On hot days, heat is transferred into your house through the walls, windows, and roof.
What are the following 3 facts concerning heat transfer?There are three major ways that heat energy can be moved from one location to another. The movement of matter particles carries heat energy in CONVECTION. Particle vibration in CONDUCTION transfers heat. Electromagnetic waves directly transport heat in RADIATION.
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a horizontal force of 8,000 newtons is required to pull a 2,548 kilogram truck across the floor at constant speed across the road. what is the coefficient of kinetic friction?
The coefficient of kinetic friction is 0.314.
Friction is the force resisting the relative motion of sturdy surfaces, fluid layers, and material factors sliding towards each specific. There are numerous styles of friction: Dry friction is a strain that opposes the relative lateral movement of two stable surfaces in touch.
Calculation:-
Force = 8000 N
mass = 2548 kg
a = f/mass
= 8000 / 2548
= 3.14 m/s²
Force = μkN
N = mg
= 2,5480 N
μk(coefficient of kinetic friction) = Force / N
= 8000/ 2,5480
= 0.314
Friction is the shape of contact pressure. It exists between the surfaces that are in touch. The frictional force relies upon the character of the floor in contact. The rougher the ground, the extra friction is involved. The frictional force is proportional to the urgent pressure, which is the burden of the body. it's miles impartial of the place of the touch.
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A train is traveling at 30 m/s. How long does it take for the train to travel 60,000 m (60 km)?
A. 0.33h
B.0.5h
C. 33h
D. 0.56h
Answer:
0.5h
Explanation:
The train is traveling 30 m/s, which is 67.1080888 mph.
The train is traveling 60 km, which is 37.2823 miles.
37.2823 miles / 67.1080888 miles per hour = 0.55555597941 hours
0.5 Hours
a 77.3-kg man is traveling upward in an elevator at a constant velocity of 9.9 m/s. what is the normal force acting on him?
The normal force acting on a 77.3-kg man is traveling upward in an elevator at a constant velocity of 9.9 m/s is 757.54 N
∑ Fy = m a
Fn - Fg = m a
Fg = m g
Fg = Force of gravity
m = Mass
g = Acceleration due to gravity
Fn = Normal force
m = 77.3 kg
g = 9.8 m / s²
Fg = 77.3 * 9.8
Fg = 757.54 N
Since velocity is constant, a = 0
Fn - Fg = 0
Fn = Fg
Fn = 757.54 N
Therefore, the normal force acting on him is 757.54 N
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light strikes a sodium surface, causing photoelectric emission. the stopping potential for the ejected electrons is 5.0 v, and the work function of sodium is 2.2 ev. what is the wavelength of the incident light?
The energy of an incident photon is E=hf, where h is the Planck constant, and f is the frequency of the electromagnetic radiation. The kinetic energy of the most energetic electron emitted is
Km =E−Φ=(hc/λ)−Φ
where Φ is the work function for sodium, and f=c/λ, where λ is the wavelength of the photon. The stopping potential Vstop is related to the maximum kinetic energy by eVstop =
Km,so
eVstop = (hc/λ)−Φ
and
λ= hc / eVstop+Φ = 1240eV⋅nm / 5.0eV+2.2eV = =170nm
Here eVstop =5.0eV and hc=1240eV⋅nm are used.
Note: The cutoff frequency for this problem is
f0 = hΦ (2.2eV)(1.6×10 −19J/eV) / 6.626×10 −34 J.s = 5.3×10 14Hz
The wavelengths of the visible mild range between 400-700 nanometers, that is among the infrared having longer wavelengths and the ultraviolet having shorter wavelengths. The wavelength of the visible mild suggests that its frequency is about 430-750 terahertz (THz).
The wavelength of light is the space between corresponding factors in two adjoining mild cycles, and the frequency of mild is the quantity of cycles of mild that skip a given factor in a single second.
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Kareen weighs 800n and sits at a distance of 4m from the pivot of a seesaw. zaid weighs 1200n. where should zaid sit to make sure the seesaw is balanced
Zaid should be sit at 2.6 m from pivot to make sure the see-saw is balanced.
A force or force system can rotate an object. A moment is a rotational action of force. Moments act clockwise or counterclockwise around a point. The point you select can be any point on the object, but typically the pivot point is selected.
The question is also based on Moment . For the seesaw to be balanced the moment caused by the weigh 800N of Kareen must be equal and opposite to the moment caused by the 1200 N weigh of Zaid.
A moment formula is equal to M = F x d
where , M ---> moment in N-m units
F---> force in Newton
d---> distance in meters
firstly , we calculate the force (F) resulting from the mass of each person.
Use newton's 2nd law , F = m x a .
The moment of the Kareen can be calculated using M = F x d,
moment= 800 (force or weight) x 4(distance from pivot) so, M = 3200 N-m.
The moment of the zaid must be equal and opposite to 3200N , so we have
3200 (moment) = 1200(force or weight) x d (distance).
If we divide this equation by 1200 we get 3200/1200 = d
which gives the d = 2.6m.
Hence, Zaid must sit 2.6m from the pivot to balance the seesaw with the Kareen.
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A lion with a mass of 190 kg is chasing a gazelle with a mass of 15 kg. The distance between the lion and the gazelle is 2 meters. A. How much gravitational force does the lion exert on the gazelle? b. How much gravitational force does the gazelle exert on the lion? remember to identify all data (givens and unknowns), list equations used, show all your work, and include units and the proper number of significant digits to receive full credit.
A lion with a mass of 190 kg is chasing a gazelle with a mass of 15 kg. The distance between the lion and the gazelle is 2 meters. Both will exert an equal and opposite force on each other of value 4752.4 * [tex]10^{-11}[/tex] N
Gravitational Force = G m1 * m2 / [tex]r^{2}[/tex]
= 6.67 * [tex]10^{-11}[/tex] * 190 * 15 / 4
= 4752.4 * [tex]10^{-11}[/tex] N
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The aircraft lands with a velocity of 71 m/s.
The mass of the aircraft is 3.6 × 105 kg.
Calculate the kinetic energy of the aircraft as it lands.
Answer:
Explanation:
Given:
V = 71 m/s
m = 3.6·10⁵ kg
___________
Ek - ?
Kinetic energy
Ek =m·V²/2
Eki = 3.6·10⁵·71² / 2 ≈ 907·10⁶ J = 907 MJ
What evidence do we have that the martian atmosphere was denser in the past than it is today?.
The abundance of argon by mass is 1.6% and we have observed dry stream beds and outflow channels.
An atmosphere is a layer of gas or layers of gas that surround a planet and are held in place by the gravity of the planetary body (from the Ancient Greek (atoms) "vapour, steam" and (sphere) "sphere"). When the gravity is strong and the temperature of the atmosphere is low, a planet preserves its atmosphere. The outer part of a star, which includes the layers above the opaque photosphere, is known as the stellar atmosphere; low-temperature stars may have outer atmospheres with complex molecules.
Nitrogen makes up 78% of the atmosphere of Earth, along with oxygen (21%), argon (0.9%), carbon dioxide (0.04%), and trace gases. Most of the living things use oxygen to breathe.
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which of the following has the various objects listed in order from smallest to largest? the solar system; the milky way; the local group the local group; the milky way; the solar system the solar system; the local group; the milky way the milky way; the local group; the solar system the local group; the solar system; the milky way
The local group, solar system, and the milky way are ordered from smallest to largest.
The extent of the solar system is enormous—at least 100 astronomical units— (15 trillion km). The massive gravitational force of the sun, which maintains celestial bodies like planets and asteroids in orbit around it, holds it all together. Additionally, there are eight planets in the solar system, which are enormous, almost spherical bodies that follow elliptical orbits around the sun.
The apparent diameter of the Milky Way is thought to be between 100,000 and 200,000 light-years, yet its spiral arms are only approximately 1000 light-years thick (more at the bulge). According to recent calculations, a dark matter region with some visible stars may have a diameter of up to 2 million light-years.
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The graph represents the reaction 2H₂ +0₂2H₂0 as it reaches
equilibrium. Based on the graph, which two statements about this reaction
are true?
Concentration (mol/L)
2
Time (s)
3
4
- H₂0
0₂
H
Options C and D on the graph, are the two statements about this reaction
are true.
In a chemical reaction, chemical equilibrium is the kingdom wherein both the reactants and products are found in concentrations that don't have any further tendency to change with time so that there is no observable exchange within the houses of the device.
Chemical equilibrium is the state in which both the reactants and merchandise are present in concentrations that have no similar tendency to alternate with time so that there is no observable alternate within the homes of the device.
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a bicycle with wheels radius r is traveling with a linear velocity v and an angular velocity w. a second bicycle has the same linear velocity but wheels with twice the radius. what is the angular velocity of this bicycle's wheels?
The angular velocity of the second bike is twice the angular velocity of the first bike.
Let Linear velocity of bike 1=v
Let angular velocity of bike 1=w1
Let radius of bike 1 =r 1
Linear velocity of bike 2= v2(provided in the question)
Radius of bike 2= 2x Radius of bike 1 (provided in the question)
thus, radius of bike 2= 2 x r
let Radius be represented by R
Formula of angular velocity: 2π/t
Relation between angular velocity and linear velocity:
Linear velocity= angular velocity x Radius
v=w x R
Linear velocity of bike 1=v1=w1xR1
Let v1= v
Let R1= r
v=w1 x r
w1=v/r
Angular velocity of bike 1,
w1=v/r
Linear velocity of bike 2=v2=w2xR2
v2=w2xR2
v2=v1 (Provided in Question)
then, v2=v
R2=2 x R1 (Provided in Question)
then, R2= 2x r
R2=2r
then,
v2=w2xR2
putting values
v=w2x2r
w2=v/2r
w2= 1/2 x v/r
w2= 1/2 x(v/r)
w2=1/2 x(w1)
w2=2w1
Thus,
The angular velocity of the second bike is twice the angular velocity of the first bike
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How does magnetic force affect the energy in a system of magnets when the magnets are released and begin to move?.
When two magnets in a system are released and begin to move, the magnetic energy brings about kinetic energy.
The magnets that are mentioned here surely have some mass. The magnetic force here is the force that is exerted by a magnet in the region around it and can be attractive or repulsive.
When a magnet is pulled and then released, it overshoots and starts jumping back and forth, losing a bit of energy during this jumping. This loss of energy results in the increase of kinetic energy in the system, by converting potential energy to kinetic energy.
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In a central texas grassland, the producers incorporate 12,000 kj of energy from the sun into their tissues. About how much energy would be incorporated into the tissues of herbivores?.
The herbivore uses the plant's energy to fuel its own biological functions and the growth of more bodily tissues. However, only approximately 10% of the entire plant energy is stored as additional body tissue in the herbivore's body.
Only 10% of energy moves from one trophic level to the next for each level. The 10 percent rule refers to this. Due to this law, only around 10% of the energy contained in the plants that herbivores consume gets absorbed by them. Only 10% or so of the energy stored as biomass at one trophic level, such as primary producers, is typically transferred to the next trophic level, such as primary consumers. To put it another way, from one trophic level to the next, net production typically decreases by a factor of 10.
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What is the 4 step design thinking process?.
Despite the fact that design is frequently thought of as the domain of creatives who (we have been led to believe) prefer an overall lack of structure, design thinking is very much a structured activity.
This structured activity deliberately organized systemic approach to creative problem solving is significant for a number of reasons. The group gains trust and becomes more capable of handling situations methodically. Going in order and continuing the process are essential because each step has a distinct output that the subsequent activity depends on. Additionally, no need of any coding or Photoshop experience to start using a design thinking framework. It is intended for diverse teams to be able to contribute to the steps and the process at every stage.Design thinking is crucial for a variety of reasons and aids in the design process.It assists in maintaining that people are the process' central component.It eliminates any uncertainty regarding your client's needs.It enables you to rank your top priorities for solutions.It fosters a "yes, and..." mindset during brainstorming, which leads to revolutionary ideas.By enabling the team to experiment more and fail more quickly, it aids in the learning process for teams.It's adaptable, letting you go back and forth through the steps to prototype and iterate more quickly.But design thinking is also significant from a commercial standpoint.It promotes putting the needs of the customer before anything else.It reveals information gaps about your users in business intelligence.When effectively addressed, it reveals the client's pain points and aids companies in reducing friction associated with actions (like making purchases!).By providing advice on what to avoid, it helps people save time and money.To know more about design thinking framework-
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two mas 412 9. Derive the mathematical formula of the following: a. Acceleration due to gravity on the surface of the earth b. Escape velocity c. Torque interms of I and a
Acceleration due to gravity on the surface of the earth
g=GM/r2
Escape velocity v = √GM/r
torque in terms of I and a τ = l*a
The definition of torque is the product of the force's strength and the angle at which the force's line of action is perpendicular to the axis of rotation. Torque can also be understood in terms of the law of conservation of energy. The lowercase Greek letter tau is frequently used as the sign for torque.The speed at which an object moves to escape the gravitational pull of a planet or moon without developing propulsion is known as escape velocity.The acceleration due to gravity value of 9.8 m/s2 means that the velocity of a body falling freely changes by 9.8 m/s every second.
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a ruby laser emits light of wavelength 694.3 nm. if this light is due to transitions from the n 2 state to the n 1 state of an electron in a box, find the width of the box.
The width of the box is 0.795nm.
Solution:
d = 694-3x[tex]10^{-9}[/tex]m.
The energy [tex]\left[\begin{array}{ccc}E_{n} =\frac{h^{2} n^{2} }{smL^{2} } \end{array}\right][/tex]
Transition energy is related to the emitted photon
wavelength by ΔE = [tex]\frac{h^{2}c^{2} }{8mc^{2 }L^{2} } (2^{2} -1^{2} ) = \frac{hc}{h}[/tex]
∴ L = [tex]\sqrt{\frac{3hch}{8mc^{2} } }[/tex]
= [tex]\sqrt{\frac{3*1.24*10^{3}*694.3 }{8*511*10^{3} } }[/tex]
= 0.795 x [tex]10^{-9}m[/tex]
= 0.795nm.
The first dimension is to measure its length. The length is always the longest side of the flapped box. The next dimension is width. The wide side also has a flap, but it is always shorter on the side than the length. To find the width, multiply the specified length by 2 and subtract the result from the girth.
Now you know the total length of the remaining two pages. Divide this number by 2 to get the width. For a standard box, length is the longer of the two sides width is the shorter of the two sides and height is the vertical dimension from top to bottom.
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HELP ASAP (this is science)
Changes in both biotic and abiotic factors in an ecosystem's food web may affect the members of the food web because they are in equilibrium (Option C).
What is the homeostatic state of internal equilibrium?In an ecosystem, the homeostatic state of internal equilibrium refers to the conditions required to maintain the stability of the food web, which are associated with biotic and abiotic conditions that interact in the ecosystem.
Therefore, with this data, we can see that the homeostatic state of internal equilibrium depends on both biotic and abiotic factors.
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To outside observers at rest, the overall sizes of objects traveling at relativistic speeds are.
To outside observers at rest, the overall sizes of objects traveling at relativistic speeds are C) smaller.
What is Relativistic speed?This is roughly 186,282 miles per second, or "c," the symbol for light speed in mathematics. Nothing in the universe can move faster than light, according to physicist Albert Einstein's theory of special relativity, which forms the foundation of much of modern physics.
Therefore, Relativistic speed is the rate at which relativistic effects are important for achieving the appropriate level of measurement precision for the event under study. The differences between values calculated by models that take relativity into account
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See full question below
To outside observers, the overall sizes of objects traveling at relativistic speeds are
To outside observers, the overall sizes of objects traveling at relativistic speeds are
A) larger.
B) the same size.
C) smaller.
A 57.0 kg woman is in an elevator accelerating upward at 1.25 m/s². What is the normal force acting on her? [?] N Don't forget her weight!
Answer:
The normal force 630.4 N
Explanation:
Given:
m = 57.0 kg
a = 1.25 m/s²
g = 9.81 m/s²
___________
N - ?
Since the elevator is moving with acceleration UP, the reaction of the support:
N = m· (g + a)
N = 57.0·(9.81 + 1.25) ≈ 630.4 N
