The publication of research in peer-reviewed journals and conferences is a necessary part of the scientific process to ensure the dissemination of the line of investigation and thus increase the knowledge about a given topic.
What is the purpose of dissemination in research?In science, dissemination has a fundamental role because it ensures cutting-edge of knowledge about a given topic in particular, which is achieved by publication in journals.
In conclusion, the publication of research in peer-reviewed journals and conferences is a necessary part of the scientific process to ensure the dissemination of the line of investigation and thus increase the knowledge about a given topic.
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A 12-n force is applied at the point x=3m, y=1m. find the torque about the origin if the force points in (a) the x direction, (b) the y direction, and (c) the z direction.
The torque about the origin if the force points in (a) the x direction, (b) the y direction, and (c) the z direction are 12; 36; 37.9 respectively
Torque is a twisting force produced by applying a force at a distance from a point. We would need to choose a distance that is perpendicular to the force's direction. We apply the equation to determine torque,
T=Fd
where F is the force and d is the orthogonal distance to a central point.
i. If the force points in the x-direction, we need to use the y-distance to calculate torque.
T=Fxdy
T=12N *1m
T = 12 N.m
ii. If the force points in the y-direction, we need to use the x-distance to calculate torque.
T=Fxdy
T= 12N * 3m
T = 36 N.m
iii. If the force is directed in the z-direction, the straight-line distance from the origin to the point is orthogonal to the force. The magnitude of the distance will be used as the distance value. This may be determined using the equation.
||d||= √ (X2 + Y2)
where X and Y are the x and y coordinates.
T=Fz||d||
T=(12N) (√ (32 + 12)
T = 37.9 N.m
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When burned with just the stoichiometric amount of air, under conditions where no heat is lost, will produce flames at what temperature range? group of answer choices
When burned with just the stoichiometric amount of air, under conditions where no heat is lost, the temperature range in which it will produce flames is around 2100 K to 2300 K.
Stoichiometric combustion, in which all available oxygen is fully used, is burning without excess or lack of air. The general equation of a stoichiometric combustion can be determined by presuming that nitrogen reacts in extremely small amounts and is discovered after combustion in molecule form.
Stoichiometric or theoretical air is the smallest amount of air required for a fuel to burn completely. Stoichiometric combustion theoretically gives the ideal fuel to air ratio, which reduces losses and gets all of the energy from the fuel; but, in practice, stoichiometric combustion is not possible due to a variety of different variables.
Since heat losses are unavoidable, 100% efficiency is not possible.
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During a baseball game, a batter hits a high
pop-up.
If the ball remains in the air for 5.86 s, how
high above the point where it hits the bat
does it rise? Assume when it hits the ground
it hits at exactly the level of the bat. The
acceleration of gravity is 9.8 m/s².
Answer in units of m
Answer:
Доброе утро, ответ 5+5="4
Explanation:
The coefficient of sliding friction on concrete is 0.30. what weight of steel can be pulled across a concrete floor by a winch with a capacity of 450 lbs?
The weight of steel can be pulled across a concrete floor by a winch with a capacity of 450 lbs to 1500 lb.
Around 7850 kg/m3, or 7.85 g/cm3, or 490 lbs/ft3, or 13231 lbs/yd3, is the unit weight of steel. The primary usage of the steel bars is as reinforcement to increase the tensile strength of concrete constructions. The weight of steel is typically expressed in kilogrammes, tonnes, and pounds.
Calculate the amount of steel in the slab as 1% of the concrete volume (0.01 x 7850 x 3 = 236kg):
Using the Thumb Rule Given that steel has a density of 7850 kg/m3, the amount of steel needed for an RCC slab should be 1% of the entire volume of concrete, or 236 kg.
The unit weight of structural steel is taken to be 7850 kg/m3 or 78.50 kN/m3 or 7.85 g/cm3 or 490 lbs/ft3 or 13,231 lbs/yd3 according to IS code and Indian standard.
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A car is traveling at vx= 20 m/s . the driver apples brakes and the car slows down at ax=-4.0 m/s^2 what is the stopping distance?
The stopping distance for a car traveling at a velocity of 20 m/s and acceleration of -4 m/s^2 is 50 m.
The above situation is a case of motion in one dimension, which is governed by the following equations,
V = u + at ..........(i)
V^2 - u^2 = 2as ..........(ii)
S = ut + 1/2 at^2 .........(iii)
As we are given the initial velocity, the final velocity, and the acceleration, therefore we have to apply the second equation to get the answer
v^2 - u^2 = 2as
Here v is the final velocity = 0 m/s
u is the initial velocity = 20 m/s
a is the acceleration = -4 m/s^2
And s is the distance traveled by car
Putting the given values in the above equation,
(0) ^2 - (20)^2 = 2(-4)s
-400 = -8s
S = 50 m
Hence, The stopping distance for a car traveling at a velocity of 20 m/s and acceleration of -4 m/s^2 is 50 m.
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Do the following operations. Give your answer to the correct number of sig. figures.
2 m + 9.35 m + 8.6 m
The addition operation of the given figures is determined as 19.95 m in 4 significant figure.
What is significant figure?A significant figure is a figure or a digit that contributes to how accurately something can be measured.
The given values;
2 m ------> 1 significant figure
9.35 m ---------> 3 significant figure
8.6 m -------------> 2 significant figure
Perform addition operation in the given digitsAddition operator in mathematics is denoted by the symbol "+" and it implies summing the giving digits together.
2 m + 9.35 m + 8.6 m = 19.95 m (4 significant figure).
Thus, the addition operation of the given figures is determined as 19.95 m in 4 significant figure.
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Is it correct to say that, if no net impulse is exerted on a system, then no change in the momentum of the system will occur?.
Yes, it is correct to say that if no net impulse is exerted on a system, then no change in the momentum of the system will occur.
Impulse is defined as the instantaneous force applied to the object for a very short duration. It is given by the product of force and time. The expression of the impulse is given by
I = F × t where ,
F is the force
t is the time
The impulse is also defined as the change in the momentum of the object, that is,
[tex]I=Pf-Pi[/tex] where [tex]Pf[/tex] is the final momentum of the object [tex]Pi[/tex] is the initial momentum of the object
Hence, if the net impulse is zero, therefore
0=[tex]Pf[/tex]=[tex]Pi[/tex]
[tex]Pf[/tex]=[tex]Pi[/tex]
hence the momentum of the object will also not change.
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Can someone help me on number 4
An example of kinetic energy is ________. group of answer choices a coiled spring food rocket ready to be launched pouring rain a parked car
An example of kinetic energy is pouring rain.The correct response to this question is (c) pouring rain.
Kinetic energy is the capacity for a moving thing to perform work. An object must be moving in order for it to have kinetic energy. Kinetic energy is measured in joules (J), much like all other types of energy.
There must be some kind of motion that an object goes through for it to have kinetic energy. By taking them as a whole and ignoring any potential "kinetic energy" that their molecules may have, all the other alternatives in this situation are just of stationary objects.
Therefore, an example of kinetic energy is pouring rain.The correct response to this question is (c) pouring rain.
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When a diode is reverse-biased and the bias voltage is increased, what will happen to the reverse current?
When a diode is reverse-biased and the bias voltage is increased, what will happen to the reverse current will not change.
What is a diode?A diode is a semiconductor device that essentially switches current in a single direction.
While restricting current flow in the other direction considerably, it makes it easy for current to flow in one way.
Because they transform alternating current (ac) into pulsing direct current, diodes are also known as rectifiers (dc).
The type, voltage, and current capability of diodes are all rated.
Anode (positive lead) and cathode, define the polarity of diodes (negative lead).
The majority of diodes only let current flow when anode voltage is provided in the positive direction.
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different parallel, straight paths. Each car's velocity as a function of time is shown in the graph. Which of the following claims is correct
about car X and car Y?
Both car X and car Y travel in the same direction.
Between t 6s and t7s, car X and car Y are at the same horizontal position.
The change in car X's speed per unit of time increases as the time increases, and the change in car Y's speed per unit of time decreases as the time increases.
The magnitude of the acceleration of car X is the same as the magnitude of the acceleration of car Y.
Answer:different parallel, straight paths. Each car's velocity as a function of time is shown in the graph. Which of the following claims is correct
about car X and car Y?
Both car X and car Y travel in the same direction.
Explanation:
What is the conc of the fully deprotonated glycylglysine in a 100 mm solution at ph 9.0?
The concentration of the fully deprotonated glycylglycine 100 mm solution at ph 9.0 is 8.8mM.
What is deprotonation?In an acid-base process, deprotonation (or dehydronation) refers to the removal (transfer) of a proton (or hydron, or hydrogen cation), (H+), from a Brnsted-Lowry acid.
The formula that can be used in this context:
pH = pKa2 + log base/acid
9.0 = 8.13 + log deprotonated/ protonated
0.87 = log [deprotonated] / [protonated]
[deprotonated] / [protonated] = 10^0.87 = 7.4 → 1
Here we have been provided that,
Ct = the provided total concentration of glycylglycine = 100mM
so, Ct = [deprotonated] + [protonated]
100mM - [deprotonated] = [protonated]
Thus, setting up the values in equation 1, we have
[deprotonated glycylglysine ] / 100mM - [deprotonated] = 7.4
⇒ [deprotonated glycylglysine ] = 7.4 [100mM] - 7.4[deprotonated]
⇒ [fully deprotonated] = 7.4 [100mM] / 8.4
= 88.09 mM
≈ 88mM
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A cylinder initially contains a liquid-vapor mixture of water. water has a total mass of 10 kg and a quality facor of:________
A cylinder initially contains a liquid-vapor mixture of water. water has a total mass of 10 kg and a quality factor of x1= 0.8.
Numerous variables, including the quantity of salt (or salinity), bacteria levels, dissolved oxygen concentrations, and the number of debris suspended in the water, are used to determine the quality of water (turbidity). The individual index values of some or all of the parameters within the five categories of water quality parameters are averaged to create the WQI. Turbidity (NTU*) of the water and/or Secchi disk depth (in meters or feet); Oxygen that has been dissolved: Oxygen concentration in milliliters. They consist of nutrients, pH, temperature, salinity, and dissolved oxygen (nitrogen and phosphorus). One of the most crucial elements of water management is the assessment and management of water quality. With increasing worries and understanding about the effects on the environment and public health, this has gained substantial worldwide significance throughout time.
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An aqueous solution with a ph of 2.00 is diluted from 1.0 l to 3.0 l. what is the ph of the diluted solution?
The aqueous solution with a ph of 2.00 is diluted from 1.0 l to 3.0 l.The ph of the diluted solution will be 2.48.
The pH serves as a gauge for a solution's acidity or alkalinity, as well as its hydrogen ion concentration. The pH scale typically ranges from 0 to 14. Acidic aqueous solutions at 25 °C are those with a pH below 7, and basic or alkaline solutions are those with a pH above 7.
Anything that is acidic is below 7.0, while everything that is alkaline or basic is above 7.0. A pH scale that lists the pH values of common substances and ranges from 0 (extremely basic/alkaline) to 14 (very basic/alkaline).
A solution's pH is a significant indicator of its chemical composition. The pH can affect how readily available nutrients are, how biological processes work, how bacteria behave, and how chemicals behave.
Aqueous solutions are made up of water and one or more dissolved materials. Solids, gases, or other liquids can all dissolve in an aqueous solution.
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A slice of cheese has a mass of 44 g and a volume of 33 cm3. what is the density of the cheese in units of g/cm3 and g/ml?
The density of cheese is 1.33 g/cm³ or 1.33 g/mL.
We need to know about the density to solve this problem. Density is a unit that measures how dense an object is. Density can be measured by dividing mass by volume. It can be written as
ρ = m / V
where ρ is density, m is mass and V is volume
From the question above, we know that
m = 44 g
V = 33 cm³
As we know that 1 cm³ is equal to 1 ml, hence the answer will be the same.
By substituting the following parameters, we get
ρ = m / V
ρ = 44 / 33
ρ = 4/3
ρ = 1.33 g/cm³
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in a slap shot, a hockey player accelerates the puck from a velocity of 11 m/s to 50 m/s in the same direction. if this takes 3.33x10^-2 s, calculate the distance over which the puck accelerates
The distance traveled by the puck is 0.203 m.
What is distance?This can be defined as the length between two points.
To calculate the distance which the puck accelerate, we use the formula below.
Formula:
S = (v+u)t/2.......... Equation 1Where:
S = Distancev = Final velocityu = Initial velocityt = TimeFrom the question,
Given:
v = 50 m/su = 11 m/st = 3.33×10⁻³ sSubstitute these values into equation 1
S = (50+11)3.33×10⁻³ /2S = 0.203 mHence, the distance traveled by the puck is 0.203 m.
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What is the independent variable in the following hypothesis: “If carbon dioxide is added to the atmosphere, then the temperature of the Earth will rise.”
A
Presence of carbon dioxide
B
The atmosphere
C
The Earth
D
Temperature of the Earth
The independent variable in the given scenario is the presence of carbon dioxide. The correct option is A.
What is independent variable?The term "independent variable" means precisely what it seems like. It is a parameter that is independent of all the other variables individuals are attempting to measure.
In mathematical modeling, data techniques, and exploratory sciences, dependent and independent variables are variables. According to the hypothesis, this variable has a direct effect on the dependent variable.
In the given scenario, the temperature of atmosphere is getting changed by the presence of carbon dioxide, so it can be better to say that here, carbon dioxide is independent variable and temperature is dependent one.
Thus, the correct option is A.
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A sheet of aluminium foil is held in front of a radioactive source. TWO types of radiation are detected on the other side. State which type of radiation will NOT be detected. * giving out BRAINLIEST
If a sheet of aluminum foil is held in front of a radioactive source. Two types of radiation are detected on the other side. The alpha particle radiation will not be detected.
What is radioactivity?The ability of some unstable atoms to emit nuclear radiation spontaneously, typically in the form of alpha or beta particles frequently accompanied by gamma rays, is known as radioactivity.
As given in the problem statement, if a sheet of aluminum foil is held in front of a radioactive source. Two types of radiation are detected on the other side, then we have to find which type of radiation will not be detected on the other side.
When a radioactive source is in front of a sheet of aluminum foil. On the opposite side, radiation of two different sorts is seen. There won't be any indication of alpha particle radiation.
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What is the symbol, atomic number, # of protons, # of electrons, atomic mass, rounded atomic mass, # of neutrons (show work), and period of: aluminum
The properties of aluminum are as follows:
symbol = Alatomic number = 13number of protons = 13number of electrons = 13atomic mass = 26.981539 urounded atomic mass = 27 amunumber of neutrons = 14period : belongs to period 3What are elements?Elements are pure substances which are composed of the same type of atoms.
Elements are the building block of all forms of matter.
Aluminum one of the known 118 elements.
In the period table, aluminum has the following properties:
symbol = Alatomic number = 13number of protons = 13number of electrons = 13atomic mass = 26.981539 urounded atomic mass = 27 amunumber of neutrons = 14period : belongs to period 3In conclusion, aluminum is an element in the periodic table.
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A 9V battery supplies power to a cordless curling iron with a resistance of 18 ohm how much current is flowing through the curling iron
Answer:
V = IR
V = voltage = 9 volts
I = current
R = resistance = 18 ohms
V = IR
9 = I·18
A diode hasiso=10 fa and a built-in voltage of 0.8 v. what isisfor a reverse biasof 10 v?
A diode that has the iso=10 fa and a built-in voltage of 0.8 v, its reverse basis for 10v is 36.7fA
What does a diode do?As rectifiers, signal limiters, voltage regulators, switches, signal modulators, signal mixers, signal demodulators, and oscillators, diodes are a versatile electrical component.
A diode’s propensity to transmit electric current solely in one direction is its fundamental characteristic.
What are diodes and their types?An electrical device with two terminals is a diode. A semiconductor, most frequently silicon but occasionally germanium, is used to create diodes.
There are many different kinds of diodes, but the ones being addressed here include the silicon-controlled rectifier, TRIAC, transient voltage suppressor, Zener, rectifier, and Schottky diodes.
What is the diode’s operating principle?A diode’s most frequent use is to permit an electric current to flow in one direction while blocking it in another. This is known as the diode’s forward direction.
It is provided that
Vr = 10V
ϕj = 0.8 V
Iso = 10fA
The reverse current Is
Is = Iso sqrt [1 + Vr/ϕj] → 1
Substituting all the values provided in question to equation 1, we have
Is = 10fA sqrt (1+10/0.8)
=(10fA) sqrt (13.5)
= 36.7fA
Thus Is = 36.7fA
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PLEASE HELP!!!!!!!!! 100 POINTS!!!!!!!!!!!! According to Newton's Third Law, if a hammer puts a force of 200 N on a nail, how much force does the nail put back on the hammer?
Answer:200N,
Explanation:
the hammer exerts a force nail, then the nail will exert a force of equal magnitude and opposite direction back on the hammer.
The nail put back a force of 200 N on the hammer in opposite direction.
What is force?An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.
Given that; hammer puts a force of 200 N on a nail.
According to Newton's Third Law of motion, every action has equal and opposite reaction.
So, the nail put back a magnitude of 200 N force on the hammer in opposite direction.
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Why must you calibrate your micropipette with oleic acid solution and not with water?
The reason why the micropipette must be calibrated with oleic acid solution and not with water is that Oleic acid can spread out unlike water. Hence, the drop volume will be different skewing the volume.
Oleic acid does have the characteristic of spreading out across a monolayer with a measurable thickness. Water, on the contrary hand, contains a variety of drop sizes, which skews the volume and thus affects the calibration. Because of this, oleic acid is recommended.
Water repels the non-polar chain (it is hydrophobic), while water attracts the polar end (hydrophilic). A very dilute oleic acid solution in pentane shall be used. The pentane evaporates quickly, leaving behind a thin layer of plain oleic acid.
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A vehicle accelerates to 22.60 m/s after being stopped at a red light. The vehicle travels 29.46 m while accelerating from the intersection. How fast was its acceleration?
The vehicle took 2.6 seconds to accelerate.
What is Acceleration ?Acceleration is the rate at of change of velocity. It is a vector quantity. That is, it has both magnitude and direction.
Given that a vehicle accelerates to 22.60 m/s after being stopped at a red light. The vehicle travels 29.46 m while accelerating from the intersection. How fast was its acceleration?
The parameters to be considered are:
Initial velocity u = 0Final velocity v = 22.6 m/sDistance s = 29.46 mTime t = ?Let us first calculate the acceleration by using the formula
v² = u² + 2as
22.6² = 0 + 2 × a × 29.46
510.76 = 58.92a
a = 510.76 / 58.92
a = 8.67 m/s²
Now, we can know how fast was its acceleration by using the formula
v = u + at
22.6 = 0 + 8.67 × t
22.6 = 8.67t
t = 22.6 / 8.67
t = 2.61 s
Therefore, the vehicle took 2.6 seconds to accelerate.
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A+particularly+precise+and+accurate+speedometer+has+a+5.0%+uncertainty.+what+is+the+range+of+possible+speeds+when+it+reads+67.0+km/h?+express+your+answers+to+1+decimal+place+(tenths).
Complete Question -
(a) A car speedometer has a 5.0% uncertainty. What is the range of possible speeds when it reads 90 km/h? (b) Convert this range to miles per hour. (1 km=0.6214 mi)
a) 94.5 km/h to 85.5km/h
b) 58.7 mi/h to 53.1 mi/h
v = 67.0 km/h
dv/v % = 5
dv/v = 0.05
dv= 0.05 * 67
dv = 3.35
lowest speed = v- dv
= 67-3.35
=63.65
so upto 1 decimal lowest speed is 63.6
highest speed = v +dv
= 67 + 3.35
= 70.35
so highest speed upto 1 decimal = 70.9
lowest speed = 63.6 km/h
= 63.6 * 5/18
= 17.1 m/s ( upto 1 decimal)
highest speed = 70.9 km/h
= 70.9 * 5/18
=19.1 m/s ( upto 1 decimal}
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If a cell has a diameter of 2.0mm, what percentage of its surface area would be covered by glucose transporters (glutr)?
The percentage of its surface area would be covered by glucose transporters is 100%.
As the cell is nearly spherical, the surface area of a cell with a diameter of 2.0 mm is equal to
A= 4πr^2 = 4 pi 1 x (10^-3)^2= 12.5 x 10^-6 m^2.
The area occupied by glucose transporters is approximately 12 nm^2 or 1.2 x 10^-6 m^2.
So, the %age of area covered by glucose transporters = Surface area of the cell/ Area occupied by glucose transporters= 12.5 x 10^-6 m^2/1.2 x 10^-6 m^2 x 100 = 100%.
Thus, the percentage of its surface area that would be covered by glucose transporters is 100%.
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A car travelling at 91.0 km/h approaches the turnoff for a restaurant 30.0 m ahead. If the driver slams on the brakes with an acceleration of -6.40 m/s2
2
what will her stopping distance be?
The stopping distance of the car is 49.9 m
Data obatined from the questionThe following data were obtained from the question:
Initial velocity (u) = 91 Km/h = 91 / 3.6 = 25.28 m/sAcceleration (a) = -6.4 m/s²Final velocity (v) = 0 m//s Stopping distance (s) = ?How to determine the stopping distanceThe stopping distance can be obtained as illustrated below:
v² = u² + 2as
0² = 25.28² + (2 × -6.4 × s)
0 = 639.0784 - 12.8s
Collect like terms
-12.8s = 0 - 639.0784
-12.8s = -639.0784
Divide both sides by -12.8
s = -639.0784 / -12.8
s = 49.9 m
Thus, the stopping distance of the car is 49.9 m
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A force of 8 lb8 lb is required to keep a spring compressed to 13 ft13 ft shorter than its equilibrium length. what is its spring constant? =k= lb/ft
By using Hooke's Law, the spring constant is 0.62 lb/ft.
We need to know about Hooke's Law to solve this problem. Hooke's Law describes the force applied to spring (elastic materials) will proportional to spring constant and displacement under the elastic condition. It can be described as
F = k . x
where F is force, k is spring constant and x is displacement.
From the question above, we know that
F = 8 lb
x = 13 ft
By substituting the given parameters, we get
F = k . x
8 = k . 13
k = 8/13
k = 0.62 lb/ft
Hence, the spring constant is 0.62 lb/ft.
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What wavelength photons are needed to produce 30.0-kev electrons in compton scattering?
We need photons of wavelength 0.0177 nm
When photons interact with matter, there are four competing processes. Compton scattering is one of them.
A photon can be completely absorbed, and its energy can eject an electron from its host atom at energies of a few eV to a few keV, which correspond to visible light through soft X-rays. This phenomenon is known as the photoelectric effect.
Who made the Compton effect famous?The Compton effect was discovered by Arthur Compton.
What does the Compton effect mean?The Compton effect is the lengthening of electron-scattered X-ray and other electromagnetic wave wavelengths. It is the fundamental process by which matter absorbs radiating energy.
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When earth catches up to a slower-moving outer planet and passes it in its orbit, in the same way that a faster runner overtakes a slower runner in an outside lane, the outer planet.
When earth catches up to a slower-moving outer planet and passes it in its orbit, in the same way that a faster runner overtakes a slower runner in an outside lane, the outer planet exhibits retrograde motion.
What do you mean by retrograde motion?
Retrograde motion, in astronomy, the actual or apparent motion of a body in the opposite direction to the direction of the (direct) motions of most members of the solar system or other astronomical systems with a preferred direction of motion. Viewed from a position in space north of the Solar System (from some great distance above Earth's north pole), all the major planets revolve around the Sun in a counterclockwise direction, and all but Venus and Uranus rotate counterclockwise about their own axes; these two, therefore, have retrograde rotation. Of the known satellites of the planets, a minority show retrograde revolution. These include the four outermost moons of Jupiter; Phoebe, Saturn's outermost moon; and Triton, the largest of Neptune's moons. The orbital planes of the satellites of Uranus are so strongly inclined that describing the motion of these bodies as retrograde or direct has little meaning. The rotations around the Sun of all known asteroids are direct; of the known periodic comets, only a few, one of which is Halley's Comet, move in a retrograde orbit.To learn more about retrograde motion, refer to:
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