Rotation curves of spiral galaxies are a measure of the velocity of the stars and gas in the galaxy as a function of distance from the center. These curves are important for understanding the mass distribution of the galaxy, which in turn helps us understand the structure of the galaxy and its evolution.
In order to determine the rotation curves beyond the radii where starlight can be detected, we must use indirect methods. One of the most important indirect methods is the use of neutral hydrogen gas, which is typically found in the outer regions of galaxies. By measuring the Doppler shifts of the hydrogen gas using radio telescopes, we can determine the velocity of the gas as a function of distance. This allows us to trace the rotation curve out to much larger radii than just the starlight.
Another method for determining the rotation curves beyond the radii where starlight can be detected is to use gravitational lensing. This method relies on the fact that the gravity of a massive object, such as a spiral galaxy, can bend and focus the light from more distant objects. By measuring the distortions of the light from those distant objects, we can infer the mass distribution of the galaxy and thus its rotation curve.
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a cylinder with a movable piston contains gas at a temperature of 27oc, a volume of 1.5 m3, and an absolute pressure of 0.20 x 105 pa. what will be its final temperature if the gas is compressed to 0.70 m3 and the absolute pressure increases to 0.80 x 105 pa?
If the gas is compressed to a volume of 0.70 m³, and the absolute pressure is raised to a value of 0.80 x 10⁵ pa, the temperature will eventually reach 287.1°C.
Ideal gas equation: PV = nRT
where P is pressure, V is volume, n is moles of gas, R is the molar gas constant and T is the temperature in K.
Since n and R are constant, PV/T = constant
P1 = 0.200 x 10⁵ Pa, P2 = 0.800 x 10⁵ Pa
V1 = 1.50 m³, V2 = 0.700 m³
T1 = 27.0°C = 300.15 K, T2 = ?
P1V1/T1 = P2V2/T1
0.200 x 10⁵ x 1.50/300.15 = 0.800 x 10⁵ x 0.700/T2
Temperature T2 = 560.28 K = 287.1°C
In order to determine absolute pressure, a complete vacuum is used. In contrast, gauge pressure is the amount of pressure that is measured in relation to atmospheric pressure, also referred to as barometric pressure. The average barometric pressure at sea level is 14.7 PSIA, while the absolute pressure of a complete vacuum is 0 PSIA.
Current atmospheric pressure, which is the baseline when measuring gauge pressure, is represented as 0 PSIG. one-day Full vacuum is -14.7 PSIG, or +14.7 PSIV when expressed in terms of vacuum pressure.
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A 213 kg crate slides 7. 6 m until coming to a stop after being pushed by a large man. The effective coefficient of kinetic friction between the crate and the surface is 0. 37. Calculate the work done by friction.
The work done by friction is5869.7J.
What's friction?
friction is the force that opposes the stir of two bodies in contact.
To calculate the work done by disunion, we use the formula below.
Formula
W = mgdμ. : Equation 1
Where
W = Work done by friction
m = Mass of the jalopy
g = Acceleration due to gravity
d = Distance traveled by the jalopy
μ = Measure of kinetic friction
From the question,
Given
m = 213 kg
h = 7.6 m
g = 9.8 m/ s ²
μ = 0.37
Substitute these values into equation 1
W = ( 213 ×7.6 ×9.8 ×0.37)
W = 5869.7 J
Thus, the work done by friction when a jalopy of 213 kg slides7.6 m is 5869.7J.
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a skipper on a boat notices wave crests passing the anchor chain every 5 seconds. the skipper estimates the distance between crests is 15 m. what is the speed of the water waves? a. 3 m/s b. 5 m/s c. 15 m/s d. 45 m/s
The speed of the water waves is 3 m/s.
The wave speed is the distance a wave travels in a specific amount of time, such as the number of meters it travels in a second. The formula to calculate wave speed is given as V = f×λ. V is the speed or velocity in m/s, f is the frequency in hertz (Hz), and λ is wavelength in m.
Here, given the time period (T) is 5 s and the wavelength is 15 m.
First, the frequency can be calculated using the formula, f = 1/T.
f=1/5=0.2
Then, the wave speed is,
V=0.2×15=3 m/s
The answer is 3m/s.
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What is the average velocity between 12. 00 and 15. 00 seconds? 81. 0 m/s, east 27. 00 m/s, east 9. 00 m/s, east 0. 0123 m/s, east.
The average velocity between the time interval is 27 m/s east that is option B is correct.
Velocity is a vector quantity that is it has both magnitude as well as direction and it can be represented as
Velocity = Displacement/Time
The unit of velocity is m/s. Average velocity is the ratio of the change in displacement to the change in time. Now, If we look at the graph
The Displacement of the object in the graph after 12.00 seconds = 144 m
The Displacement of the object in the graph after 15.00 seconds = 225 m
Average velocity = Change in displacement/Change in time
Average velocity = (225 - 144)/(14 - 12)
Average velocity = 81/3
Average velocity = 27m/s
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a golf ball leaves the ground at a speed of 4.5 m/s and at an angle of 66.02 above the horizontal. what are the maximum height and flight time of the ball?
A golf ball leaves the ground at a speed of 4.5 m/s and at an angle of 66.02 above the horizontal.
Thus, maximum height of the ball = 1.534 m
the flight time = 0.839 sec
What is speed?The pace at which a distance changes over time is referred to as speed. It has a dimension of time-distance. As a result, the fundamental unit of time and the basic unit of distance are combined to form the SI unit of speed. Thus, the metre per second (m/s) is the SI unit of speed.
Given that,
Speed (u) = 4.5 m/sec
angle (θ) = 66.02
Flight time of the ball (T) = 2u sinθ/g
T = [2 ×4.5 × sin (66.02°)] /9.8
T = 0.839 sec
Range (R) = u cosθ × T
or, R = 4.5 × cos (66.02°) × 0.839
or, R = 1.534 m
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what is the change in potential energy of an energetic 64 kgkg hiker who makes it from the floor of death valley to the top of mt. whitney?
11,700 Joules are roughly lost from the hiker's energy stored. These are computed by adding the hiker's mass (64 kg), the elevation difference among both Death Valley & Mt. Whitney (2,400 m), and the lift force (9.8 m/s2).
Assessments must be made in the beginning to ascertain where far the climber is ascending. At 14,505 feet above sea level, Mount Whitney is indeed the tallest mountain there in continental United States. At 282 feet below sea level, Death Valley was its lowest place in North And south america. This indicates that the hiker is ascending an overall height of 14,787 feet.
Calculating the variation in potential electricity is produced following. Potentially energy is equivalent to something like an object's mass increases the speed caused by gravitation times the object's altitude. Therefore, the hiker's modification in energy potential can be measured:
(64 kg) * (9.8 m/s2) * (Change in Potential Energy) (14,787 ft)
9,424,912 kg/m2/s2 equals the change in potential energy.
The hiker weighing 64 kilograms will experience a 9,424,912 kg m2/s2 shift in potential energy as they ascend into the Death Valley floor towards the peak of Mt. Whitney.
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How do you solve elastic potential energy problems?
The formula for calculating elastic potential energy stored in spring is Elastic potential energy = 0.5 * spring constant * extension square
When as elastic body is deformed, energy stored in the body is called elastic potential energy. This energy gets stored in the object till the time it is deformed. When force is removed, this energy changes into kinetic energy.
An object that can store elastic potential energy has a high elastic limit. When an object is deformed beyond the elastic limit, it can not gain its shape after removing force.
The force that is needed to stretch the spring is directly proportional to its displacement. It is given as F = k* x
where, k is spring constant
x = displacement
The elastic potential energy formula of the stretched spring is given as
PE = 1/2* k* x²
where,
PE = elastic potential energy and it is expressed in Joule
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a single slit of widthis illuminated by asodium yellow light of wavelength 589 nm. findthe intensity at aangle to the axis in termsof the intensity of the central maximum.
According to the following formula, the intensity upon an angle with the axis Intensity is defined as (Central Highest Intensity) * (sinc (angle * /w))2.
in which the slit's width (w) and also the light's wavelength () are both given.
Accordingly, the concentration perpendicular towards the axis is equal to the intensity of something like the central maximum and is as follows:
Intensity is measured in terms: (Centre Maximum Intensity) * (sinc (angle * 589 nm/w))2
The the light's intensity at such an angles towards the center maxima can indeed be computed utilizing diffraction equation theory and presuming the singular slits is just a rectangle split according follows:
I() = I0 sin2 (Bsin/I)
Here B is the slit's width, I0 is the center maximum's intensity, & seems to be the light's wavelengths.
Substituting the given values we get:
I(θ) = I₀ sin²(πBsinθ/589 x 10⁻⁹ m)
For sodium yellow light (589 nm), the intensity of the central maximum is I₀.
In addition to highlighting of the center maxima, the intensity at such an angle with the axis is nonetheless:
I(θ) = I₀ sin²(πBsinθ/589 x 10⁻⁹ m)
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nancy is in her early 60s and nervous about growing old because she doesn’t want to be limited in her daily functioning or lose her memory or judgement. how might you reassure nancy about her fears?
I would like assure Nancy by telling her her Dementia is not inevitable; while 10% will develop dementia in their lifetime, less than half of people above age 84 will have it. So there is a 90% chance that Nancy might not lose her memory or judgement.
What is Dementia?Dementia is described as a general term for loss of memory, language, problem-solving and other thinking abilities that are severe enough to interfere with daily life.
Dementia is characterized by impairment of at least two brain functions, such as memory loss and judgement.
So there are high chances that Nancy might not lose her memory or judgement and normal functioning.
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When a nucleus of 235U undergoes fission, it breaks into two smaller, more tightly bound fragments. Calculate the binding energy per nucleon for 235U and for the fission product 137Cs .
When a nucleus of 235u undergoes fission, it breaks into two smaller, more tightly bound fragments. The binding energy per nucleon for 235-U is 7.6 MeV and 137-Cs is 8.39 MeV.
In experimental physics, nuclear binding energy is the minimal amount of energy needed to separate an atom's nucleus into its component protons and neutrons, also known as nucleons.
The following equation provides the binding energy of a nucleus:
BE = Δmc² in which;
BE = Energy bound
Mass defect = m.
c = the speed of light = 931.49 MeV/u
For 235U:
A = 235
Δm = 1.9150664
BE = 1.9150664 x 931.49 MeV/u.
= BE = 1783.8648 MeV
The formula of the nucleon's binding energy is BE/A
= BE/A = 235 x 1738.648 MeV
= BE/A = 7.6 MeV
The binding energy for 137-Cs will be:
Mass defect m = 1.23383 unit
= BE=1.123383 u x 31.49 MeV/u = 1149.3003 MeV
Additionally, the binding energy per nucleon, BE/A =
= A = 137
= BE/A = 137 x 1149.3003 MeV
= BE/A = 8.39 MeV
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What is the frequency of wavelength 500 m?
The frequency of wave is 0.6×10⁶Hz if 500m is the wavelength of the light wave.
Frequency is defined as the rate at which current takes an alternate route each second. It is estimated in hertz (Hz), a global unit of measure where 1 hertz is equivalent to 1 cycle each second. The inverse of frequency is known as spatial frequency.
For electromagnetic wave ,we have an expression
c=ν × λ
where c is the defined as the speed of wave in any medium,
ν is defined as the frequency of the wave and
λ is defined as the wavelength of the wave.
Since wave is light wave so speed(c) of light =3×10⁸m/sec,
frequency=? and wavelength=500m
Therefore,3×10⁸m/sec=v×500
=>v=(3×10⁸)/500
=>v=0.6×10⁶/sec
or=>v=0.6×10⁶Hz.
Hence, frequency of light wave is 0.6×10⁶m.
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(Complete question) is:
What is the frequency of wave having wavelength 500m.Assume wave is a light wave?
A 3. 00-kg rifle fires a 0. 00500-kg bullet at a speed of 300 m/s. Which force is greater in magnitude: the force that the rifle exerts on the bullet or the force that the bullet exerts on the rifle?.
Answer:
Forces are equal
Explanation:
The forces are equal in magnitude and opposite in direction. This is Newton's 3rd Law of Motion.
what happens when two oceanic plates diverge?
Divergent plate boundaries are where two plates are shifting apart from one another. Rising magma from the core of the Earth at these boundaries erupts, forming a new layer on the lithosphere. Ocean-spreading ridges are submerged mountain ranges that are formed by the majority of divergent plate borders.
What is a Divergent Plate Boundary?A diverging boundary, also referred to as a divergent boundary, is a linear structure that occurs between two tectonic that are moving apart in the field of plate tectonics. It is sometimes referred to as a constructive barrier or an extensional border.
Rifts are initially created by divergent plate boundaries within continents; they later develop into rift valleys. Oceanic plates' mid-oceanic ridges are where the majority of active plate boundary borders are found.
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ncreasing the plate area of a capacitor increases the capacitance. group of answer choices true false
true increasing the plate area of a capacitor increases the capacitance.
Greater capacity to hold an electric charge is offered by larger plates. Consequently, capacitance rises as plate area increases. The electrostatic force field created between the plates has a direct correlation with capacitance. When the plates are closer together, this field is more powerful.
Improve the surface area of the parallel plate capacitor, shorten the distance between the plates, and utilize a dielectric material with a greater dielectric breakdown strength between the plates if you wish to increase the capacitance.
The distance between the conductors and the insulation surrounding the conductors both have an impact on capacitance. The capacitance will rise if the conductors are packed closer together or have a greater surface area (longer wires, shields, etc.).
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The planet Earth orbits around the Sun and also spins on its own axis.
a) Calculate the angular momentum, in kilogram meters squared per second, of the Earth in its orbit around the Sun.
b) Calculate the angular momentum, in kilogram meters squared per second, of the Earth spining on its axis.
c) How many times larger is the angular momentum of the Earth in its orbit than the angular momentum of the
Earth spinning on its axis?
In its orbit around the Sun, Earth has an angular momentum of 2.661 1040 kg/m2/s.
what is angular momentum?A rotating object's property that is determined by its moment of inertia multiplied by its angular velocity is known as angular momentum. It is a characteristic of rotating bodies determined by their combined moments of inertia and angular velocities.
What governs angular momentum?In the equation for angular momentum, L stands for angular momentum, I for rotational inertia, and (the Greek symbol omega) for angular velocity. This can be put more simply by saying how an entity's angular momentum is equal to the sum of its mass, speed, and separation from the point of rotation.
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what best describes the sum of all forces acting on an object
Answer:
Net Force.
Explanation:
Net force is the sum of all of the forces acting upon any one object.
Let me know if this helped!
Answer:
net force
Explanation:
A train is approaching you at very high speed as you stand next to the tracks. Just as an observer on the train passes you, you both begin to play the same Beethoven symphony on portable compact disc players. (a) According to you, whose CD player finishes the symphony first? (b) What If? According to the observer on the train, whose CD player finishes the symphony first? (c) Whose CD player really finishes the symphony first?
Talking about the CD player,
a)My CD player will finishes the symphony first
b) According to observer, Observer's CD player finishes the symphony first
c)In reality both CD player finishes the symphony altogether.
The answers are different just because the point of reference. In the given problem, we are dealing with the relative velocity to each other. The person sitting on the train is moving with a very high speed relative to the person standing next to the track. The relative velocity (likewise or ) is the velocity of an item or eyewitness B in the rest casing of another item or spectator A.
Relative velocity is the velocity of an article corresponding to another item. It is a proportion of how quick two items are moving concerning one another. Relative velocity is significant in physical science since it assists us with understanding how articles move and collaborate with each other.
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what is the total net force of 10n, 9n and 16n?
Answer:
35N
Explanation:
If they are on the same direction, then we would add to get the required net force:-
(10 + 9 + 16 )N = 35N
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the driver of a motorboat that can move at 10 m/s in still water wishes to travel directly across a narrow strait in which the current flows at 5.0 m/s. at what angle upstream should the driver head the boat?
The angle of the upstream of the driver of the boat is 30°
The velocity of the boat = Vb = 10m/s
The velocity of the water in the river = Vw = 5m/s
θ = [tex]sin^{-1}[/tex] (Vr/Vb)
θ = [tex]sin^{-1}[/tex] (5/10) = 30°
Upstream refers to a boat that is moving against the flow of the stream. The term " speed" in this context refers to the boat's net speed. Downstream. A boat is said. to be moving downstream if it is moving. in the same direction as the stream. A stream is the name for the flowing water. in a river. The difference when speaking about water in rivers and streams is that upstream, also known as upriver, is in opposition to the water flow and in the direction of the water's original source (where the river originates). For instance, a boat can navigate upstream against the river's downward flow.
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a magnitude 8 earthquake occurred in western quakesville in 1857. if the largest aftershock is one m7 event, how many magnitude 6 aftershocks are expected?
The magnitude 6 aftershocks are expected is 10².
What is the magnitude of aftershocks?The other fundamental principle governing aftershocks is known as Bath's Law, and it states that the magnitude difference between a main shock and its biggest aftershock, which is typically between 1.1 and 1.2 on the Moment magnitude scale, is roughly constant and independent of the magnitude of the main shock.
100 times as strong as a magnitude 6 earthquake is a magnitude 8 earthquake. The Richter scale is logarithmic, just like all the other light scales below. It is more precisely known as the "local light scale" or ML. In other words, the amplitude increases tenfold for every unit on the scale. Ten times as strong as a magnitude 6.0 earthquake is one with a magnitude of 7.0.
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When measuring the mass of a condensed volatile liquid collected, you need to correct its mass by the mass of the air lost in the process.
Correction of the mass of the volatile liquid that is subjected to a condensation process is required because part of the vapors that circulate through the system do not condense, and these can go to the atmosphere or be collected by another system.
Principles of the condensation systemThe collection of the volatile condensed liquid is generally carried out in a piece of equipment (condenser) that has pipes through which the vapors of the element circulate and through which they pass to the liquid phase, decanting it at the end of the system.
Loss of mass in the condensation systemTo treat the greatest amount of vapors to be condensed, the pipe can be lengthened (number of steps) through which they circulate or the temperature of the condenser element with which they exchange heat (usually water) can be lowered.
However, even in high efficiency systems there will always be a certain percentage of vapors that do not condense, so it will be necessary to make a correction to the mass of liquid collected.
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there are four stages of sintering. beginning with point contact and followed by the initial diffusion stage, what are the two final stages of the process?
When the pores close up during the final stage of sintering, the resistance to grain growth is reduced. When the component is more than 92% dense, the final stage of sintering typically begins.
What phases comprise sintering?First-year neck growth Diffusion at the point of contact is the initial mechanism by which the particles that are in contact form grain boundaries during sintering.
Sintering at the Middle Stage. Adjacent necks start to impinge on one another when intermediate stage sintering starts.
Sintering at the end stage.
By passing your components through a warm furnace, sintering is accomplished. The objective is to maintain the temperature at a level that is nearly but not quite below the primary metal of your parts' melting point. The metal particles bond together during the sintering process, resulting in a part that performs the function for which it was designed.
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a uniform, aluminum beam 9.00 m long, weighting 300 n, rests symmetrically on two supports 5.00 m apart. a boy weighing 600 n starts at point a and walks toward the right.
a uniform, aluminum beam 9.00 m long, weighting 300 n, rests symmetrically on two supports 5.00 m apart.120x+150N cm.
Why would someone utilize aluminum beams?Common uses for this material include walkways, awnings, rafters, trailers, overhead supports, and structural elements for both commercial and residential buildings. Since the broader, straight-edged flanges make couplings and fitting easier, Aluminum Associations beam products typically have greater versatility.
Are aluminum beams stronger than steel?In fact, some steels can be compared to some aluminum grades in terms of strength. In spite of this, steel will typically be stronger when comparing samples of the two metals that are the strongest: aluminum and steel.
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an object has an acceleration of 15.7 m/s/s. if the mass of the object is increased by a factor of 13.6, what would be the new acceleration of the object?
If an object's mass is raised by a factor of 13.6, its acceleration would change to 213.52 m/s from its initial acceleration of 15.7 m/s. For an object's mass gets increased.
In mechanics, acceleration is the rate at which an object's velocity with respect to time changes. The vector quantity of accelerations (in that they have magnitude and direction). The direction of the net force imposed on an object determines its acceleration in relation to that force. A physical body's mass is its total amount of matter. Inertia of the body is also measured by it.
F = ma
F = m*15.7\sF = 15.7m
The new acceleration is given by F = (13.6m*a) F = (13.6m*15.7) F = 213.52m where F = (13.6m*a)
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what is the magnetic field amplitude b0 of an electromagnetic wave that has an electric field amplitude e0 of 0.365 v/m ?
The amplitude of the magnetic field for the given electromagnetic waves is [tex]1.21 * 10^{-9}[/tex] T.
For electromagnetic waves the relation between electric field amplitude and magnetic field amplitude is given as
[tex]\frac{e_{0} }{b_{0} } = c[/tex]
where c is the speed of light in free space i.e. [tex]3 * 10 ^{8}[/tex] m/s.
Finding the amplitude of the magnetic field for the given question by substituting the values in the given relation :
[tex]b_{0} = \frac{e_{0} }{c}[/tex]
[tex]b_{0} = \frac{0.365}{c} = 1.21 * 10^{-9}[/tex] T
Electromagnetic waves are produced when an electric field interacts with a magnetic field. The term "electromagnetic" is used to describe them. The magnetic and electric fields of an electromagnetic wave are parallel (at right angles). They also follow the direction of the EM wave, but perpendicularly.
There is no redirection of them by electric or magnetic fields. Diffraction and interference are possible with EM waves.
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Which method of measuring distances would you use if you wanted to measure the distance to stars in a nearby galaxy?
The parsecs is the method used to measure the distance to stars in a nearby galaxy.
Since space is so vast, many astronomers choose to use a unit of measurement known as a parsec instead of measuring distances in miles or kilometers. the nearest star, Alpha Centauri, in your mind
What is A parsec is either a time or a distance measurement.
Why then would Solo use a parsec, which measures distance rather than time, to describe how fast his ship could move? Here, two distinct narratives are in play.
This distance of the celestial bodies is measure in light years also.
Unlike time, a parsec measures distance. When he said this, Solo wasn't specifically referring to his ship's speed of his ship.
A lightyear, or the distance light travels in a year (about 9.5 trillion km), is a unit of measurement used to describe distance in space.
Therefore, parsecs and lightyear is the method used to measure the distance to stars in a nearby galaxy.
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The Hertzsprung-Russell diagram plots
stars according to what three stellar
properties?
The Hertzsprung-Russell diagram plots stars according to: the colour of stars (or spectral type) against their absolute magnitude (the observational HR diagram, also known as a colour-magnitude diagram) or the temperature of stars against their luminosity (the theoretical HR diagram).
What is Hertzsprung-Russell diagram ?The Hertzsprung-Russell diagram, also known as the HR diagram, HRD, or H-R diagram, is a scatter plot of stars that illustrates the correlation between the stars' absolute magnitudes or luminosities and their stellar classifications or effective temperatures.
The diagram, which was independently produced in 1911 by Ejnar Hertzsprung and in 1913 by Henry Norris Russell, marked a significant advancement in our understanding of star evolution.
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A ball is hit straight up with an initial speed of 28 meters per second. What is the speed of the ball 2. 2 seconds after it is hit?.
The speed of the ball that hit straight up with an initial speed of 28 meters after 2.2 seconds it is hit = 6.44 m/s.
The speed of the ballThe magnitude of the velocity of an object in uniform motion is highly dependent on the magnitude of the initial velocity of the object and the acceleration experienced. Slowed down uniform motion is motion where the speed of an object always decreases every second, until the object stops.
By neglecting friction, the equation to determine the speed of the ball after t seconds:
v = v₀ - gt
We have,
Initial speed of the ball = 28 m/s ⇒ v₀
t = 2.2 s
The gravity acceleration = 9.81 m/s² ⇒ g
So, the speed of the ball:
v = 28 - (9.8) (2.2)
= 28 - 21.56
= 6.44 m/s
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The wavelength of blue light is greater than red light and its energy is greater. (True or False)
Blue light has shorter waves, red light has longer waves, with wavelengths around 620 to 750 nm. Blue light has a higher frequency and carries more energy than red light.
What is wavelength?Wavelength is the distance between successive crests or troughs of a wave moving in the same direction. It is denoted by the Greek letter lambda (λ). Therefore, the distance between either one crest or trough of one wave and the next wave is known as wavelength.
Blue light waves has shorter wavelengths, with wavelengths between about 450 and 495 nanometers. Red light has longer waves, with wavelengths around 620 to 750 nm. Blue light has a higher frequency and carries more energy than red light. The wavelengths of light waves are very, very short, with about a few 1/100,000ths of an inch.
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Secret materials may be transmitted y the same methods as Confidential materials.
The statement is false that Secret materials may be transmitted by the same methods as confidential materials is False.
There are three characterization levels for the information system in the US: Highly classified, Secret, and Confidential. The term "secret" should allude to data whose unapproved disclosure could sensibly be expected to significantly affect the public safety.
Data that could sensibly be anticipated to hurt public safety whenever unveiled without approval will be marked as "classified.". Confidential material might be sent by U.S. Certified mail as opposed to by U.S. Enlisted mail. It can't be shipped off workers for hire by means of Top of the line mail.Highly confidential data will not be replicated or repeated without endorsement from the Highly classified Control Official.
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