The gravitational force between two trucks, each with a mass of 20000 kg, that are 2.0 m apart is 6.67 * 10⁻³ N
F = G m1 m2 / r²
F = Gravitational force of attraction
G = Gravitational constant
m1, m2 = Masses
r = Distance between both masses
G = 6.67 * 10⁻¹¹ N m² / kg²
m1 = 20000 kg
m2 = 20000 kg
r = 2 m
F = G m1 m2 / r²
F = 6.67 * 10⁻¹¹ * 20000 * 20000 / 2²
F = 6.67 * 4 * 10⁻³ / 4
F = 6.67 * 10⁻³ N
F = 6.67 m N
Therefore, the gravitational force between two trucks is 6.67 m N
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Thermodynamics 2 QUESTION 3 A stationary gas-turbine power plant operates on a simple ideal Brayton cycle with air as the working fluid. The air enters the compressor at 95 kPa and 290 K and the turbine at 760 kPa and 1100 K. Heat is transferred to air at a rate of 35,000 kJ/s. Compare the power delivered by for the following assumptions: a. assuming constant specific heats at room temperature b. accounting for the variation of specific heats with temperature.
Assuming constant specific heats at room temperature, the power delivered by gas-turbine power plant that operates on a simple ideal Brayton cycle with air as the working fluid is 15678.25 KW
P1 = 95 KPa
T1 = 290 K
T3 = 1100 K
P2 = P3 = 760 KPa
Qin = 35000 KJ / s
At constant specific heats at room temperature,
R = 0.287 KJ / Kg K
cp = 1.005 KJ / Kg K
cv = 0.718 KJ / Kg K
K = 1.4
Pressure ratio, rp = P2 / P1
rp = 760 / 95
rp = 8
Efficiency, η = Wnet / Qin
1 - 1 / [ ( rp )^( ( k - 1 ) / k ) ] = Wnet / Qin
Wnet = 35000 * 1 - 1 / [ ( rp )^( ( 1.4 - 1 ) / 1.4 ) ]
Wnet = 35000 * 0.44795
Wnet = 15678.25 KW
Therefore, the power delivered is 15678.25 KW
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what is the function of the diaphragm on a microscope
The function of a diaphragm on a microscope is to control the amount of light that reaches the specimen.
What is a microscope?Microscope is an optical instrument that is used for observing relatively small objects. The microscope allows us see very small things that our eyes otherwise couldn't see.
Their ability to function is because they have been constructed with special components that enable them to achieve high magnification levels.
Some of the components of microscope are as follows;
Eye pieceObjective lensNose pieceDiaphragm or irisAdjustment knobStageCondenserApertureThe primary role of the diaphragm is to control the amount of light that reaches the specimen.
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Crane with 5 kW motor lifts the load evenly at a speed of 0.1 m/s. What is the weight of the cargo?
Answer: 0.5
Explanation:
The speed of a wave is 25 m/s and the wavelength is 0. 10 m. What is the frequency of the wave?.
now consider the gaussian surface s2. with the charge still inside the cavity, what is the electric flux, in newton squared meters per coulomb, through surface s2?
Gauss's law states that the total electric flux through any closed surface is proportional to total electric charge inside the surface.
The electric flux is the measure of the electric field through a given surface. The electric field is the gradient of the potential. The density of the lines corresponds to the electric field strength, which could also be called the electric flux density. Electric flux is proportional to the total number of electric field lines going through the surface.
Electric flux has SI units of volt meters or equivalently newton meters squared per coulomb. Thus, the SI base units of electric flux are kg m3s -3*A-1.
The quantity EA1 is the electric flux through S1. We represent the electric flux through an open surface like S1. Electric flux is a scalar quantity.
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While rolling on the pool table, ball X has 16.00 J of kinetic energy. It collides with identical ball Y and ball X stops, but ball Y moves on with 15.75 J of kinetic energy. What causes the loss of energy?
Inelastic collision and a host of other factors causes the loss of energy.
What is kinetic energy?Kinetic energy of an object is the energy that it possesses due to motion.
It can be defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. When it has gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.
In an inelastic collision which is the case of ball X and Y, the kinetic energy of the system is not conserved. The energy that you find lost has been dissipated as other forms of energy. This can be heat, friction, vibrational energy transferred to atoms of the colliding particles, energy lost to deform the atomic structure etc.
In conclusion, the inelastic collision nature of the two balls results in the loss of energy through different forms.
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Based on observations, which of the following statements about stars in the Milky Way is generally true?
The older the star, the lower its abundance of heavy elements.
The less massive the star, the older it is.
The older the star, the bluer its color.
The older the star, the faster its orbital speed.
The younger the star, the higher its mass
Stars in the Milky Way, the older the star, the lower its abundance of heavy elements.
An element is a substance that can not be damaged down into a simpler layout. They may be distinguished by means of a completely unique atomic range. The elements are organized via their atomic variety in the periodic table, which highlights elements with similar residences.
Carbon is the most important detail of existence. Without this detail, existence, as we are aware of it, might not exist. As you will see, carbon is a vital element in compounds essential for lifestyles.
Kinds of elements :
1.) The elements are categorized as metallic, non-metal, and metalloid.
2.) The intense left aspect factors inside the periodic desk are metals, for example, sodium, calcium, cesium, and many others.
3) Elements such as non-metals, carbon, chlorine, oxygen, and many others.
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help pleaseeeee
what is the meaning P in physics?
like in this formula P=mg
Answer:
Pressure is defined as the force per unit area: P = F/ A, or in terms of magnitude, P = mg/A, where mg is the weight of the fluid.
Explanation:
in cardiac muscle acetylcholine binds with muscarinic acetylcholine receptors, which are g-protein coupled receptors, which elicit a signal transduction pathway that induces cardiac muscle to relax. outline how g-protein coupled receptors induce signal transduction pathways including relevant secondary messengers
G-protein coupled receptors are embedded in the cell membrane and can bind to specific molecules, such as acetylcholine.
What is acetylcholine?
Acetylcholine (ACh) is indeed an organic molecule that serves as a neurotransmitter in the bodies and brains of numerous animal species, including humans. It is a derivative of acetic acid as well as choline, which is how its name was derived out of its chemical composition. Cholinergic refers to bodily regions that use or are impacted by acetylcholine. Cholinergics and anticholinergics are terms used to describe substances that alter the cholinergic system's overall activity.
The neurotransmitter that is used just at neuromuscular junction, or the chemical that is released by neurones of the nervous system to activate muscles, is acetylcholine. Because of this characteristic, cholinergic system-interfering drugs may cause very dangerous side effects, such as convulsions and paralysis.
When the receptor binds to the molecule, the receptor undergoes a conformational change, which triggers the dissociation of a G-protein subunit, Gα, from a heterotrimeric G-protein (Gαβγ). This Gα subunit can then activate an effector enzyme, such as adenylate cyclase, which converts ATP to cyclic AMP (cAMP). cAMP can then activate protein kinases, such as protein kinase A (PKA), which can phosphorylate specific proteins in the cell, leading to a cascade of events that lead to the desired physiological outcome. In the case of cardiac muscle, the PKA phosphorylation of certain proteins can lead to the relaxation of the muscle.
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A long, horizontal wire Ab rests on the surface of a table and carries a current I. A horizontal wire CD is vertically above wire AB , and is free to slide up and down on the two vertical metal guides C and D ( as shown in Fig) .Wire CD is connected through the sliding contacts to another wire that also carries a current I , opposite in direction to the current in wire AB . The mass per unit length of the wire CD is λ. To what equilibrium height h will the wire CD rise. assuming that magnetic force on it is wholly due to current in wire AB ?
The equilibrium height to which the wire CD will rise is given by the expression h = μ₀I² / 2π λg
What is magnetic field ?A region in which the force of magnetism acts is known as the magnetic field, and it surrounds magnetic materials or a moving electric charge. Moving magnetic dipoles and electric charges produce a magnetic field, which acts as a force field on other nearby magnetic dipoles and moving charges.
Magnetic field at a distance h produced by a current carrying wire
B = μ₀I/ 2πh
Magnetic force due to the present current carrying wire can be calculated by the formula
F = B I L
And we also know that F = mg
On equating these mg = B I L
( μ₀I/ 2πh ) I = ( m/ I ) g = λg
thus we get the value of h as
h = μ₀I² / 2π λg
Thus, the equilibrium height to which the wire CD will rise is given by the expression h = μ₀I² / 2π λg .
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Label the spinal cord meninges and spaces. 02:00:12 Skipped Reset Zoom Subarachnoid Arachnoid mater Dura mater Subdural Pia mater space space 7
The label from superficial to deep, of meninges and their related spaces in the correct order are:
1. Dura mater
2. Subdural space
3. Arachnoid mater
4. Subarachnoid space
5. Pia mater
What is the proper sequence of the meninges, from the superficial to the deep?The brain and spinal cord are shielded by three layers of membranes called meninges. Pia mater is the thin inner layer. The arachnoid, a structure resembling a web and filled with fluid, is the middle layer and protects the brain. The durable outer layer is known as the dura mater.
The subdural space is the area that could be found between the arachnoid mater and the meningeal layer of the dura. The subdural space typically only exists in pathological conditions, similar to the epidural space.
Therefore, Between the dura mater of your spinal cord, the bones of your vertebral column, and the dura mater of your skull is a space called the epidural space.
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Which process is required to allow a gravitationally-collapsing gas cloud to continue to collapse?.
Most of the cloud's thermal energy must be radiated away.
The cloud must constantly produce new dust particles. A collision with another cloud is required. Most of the cloud's thermal energy must be trapped there. Star formation depends significantly on angular momentum.
Low, dense clouds mainly serve to deflect solar energy and chill the Earth's surface. High, thin clouds mostly reflect incoming solar radiation; but, they also trap part of the infrared radiation that the Earth emits and reflect it back down, warming the Earth's surface.
The amount of emission from a cloud changes directly with its temperature in addition to being influenced by a number of other elements, including the thickness of the cloud and the composition of the cloud.
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A ball rolls horizontally off of a 120 m cliff with a velocity of 6 m/s. How far from the base of the cliff will it land?
The distance from the base of the cliff 120 m high the ball will land is 29.7 m.
What is distance?Distance is the length between two points.
To calculate the distance from the base the ball will land, we use the formula below.
Formula:
R = u√(2h/g)........... Equation 1Where:
R = Distance from the base of the cliff, where the ball landsh = Height of the cliffg = Acceleration due to gravityu = Intial velocityFrom the question,
Given:
u = 6 m/sh = 120 mg = 9.8 m/s²Substitute these values into equation 1
R = 6√(2×120/9.8)R = 6√24.49R = 6×4.95R = 29.7 mHence, the distance from the base of the cliff the ball will land is 29.7 m.
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What is the magnitude b of the magnetic field at the location of the charge due to the current-carrying wire?.
Using the right hand rule, it is possible to calculate the magnetic field direction at the site of the charge caused by the current-carrying wire.
In the simplest terms possible, what is a magnetic field?The region surrounding a magnet where the effects of magnetism are perceived is known as the magnetic field. To explain how the magnetic force is dispersed in the area surrounding and inside something magnetic in nature, we utilize the magnetic field as a tool.
How does the magnetic field function?The same poles resist one another whereas opposite poles are attracted to one another. The north-seeking poles of the iron's atoms line up in the same way when you rub it against a magnet.
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A man walks for 2 hours at a speed of 3m/s. How far does he travel? give your answer in kilometres.
Answer:
the answer will be 3*120*60/1000=221.6 km ok mark me brainliest pls
In hydrogen, the transition from level 2 to level 1 has a rest wavelength of 121.6 nm.Find the speed for a star in which this line appears at wavelength 120.6 nm.Express your answer to three significant figures and include the appropriate units.
The transition from level 2 to level 1 in hydrogen has a rest wavelength of 121.6 nm. The speed of a star with this line at 120.6 nm wavelength is 2500 km/s forces.
How is an object's speed related to its velocity?Speed is the pace at which an object moves along a path in time, whereas velocity is the rate and direction of movement. In other words, velocity is a vector, whereas speed is a scalar value. People may believe that average speed and average velocity are simply different names for the same quantity, but average speed is affected by distance, whereas average velocity is affected by displacement. If an object reverses direction throughout its travel, the average speed exceeds the magnitude of the average velocity. Speed was the absolute value of velocity in one variable calculus. It is the magnitude of the velocity in vector calculus.
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Is it reasonable that a 30-kg child could run fast enough to have 100 J of kinetic energy?
(A). Yes, this is reasonable
(B). No, this is not reasonable
Answer:
A.) Yes, this is reasonable
Explanation:
The formula for kinetic energy states [tex]E_k=\frac{1}{2}mv^2[/tex]:
[tex]E_k=100J\\m=30kg[/tex]
Rewrite the formula to solve for v:
[tex]v=\sqrt(\frac{2E_k}{m})\\v=\sqrt(\frac{(2)(100J)}{30kg})\\v=\sqrt(6.67\frac{m^2}{s^2})\\v=2.58\frac{m}{s}[/tex]
[tex]2.58\frac{m}{s}[/tex] translates to approximately 5.77 mph. Which seems reasonable enough for a child.
A truck loaded with sand is moving down the highway in a straight path.
a. What happens to the momentum of the truck if the truck’s velocity is increasing?
b. What happens to the momentum of the truck if sand leaks at a constant rate through a hole in the truck bed while the truck maintains a constant velocity?
Momentum, the product of a particle's mass and its velocity. Momentum is a vector quantity. It has both magnitude and direction. Isaac Newton's second law of motion states that the rate of change of momentum over time is equal to the force acting on a particle.
From Newton's second law, if a particle is subject to a constant force over a period of time, the product of that force and the time interval (momentum) equals the change in momentum. Conversely, the momentum of a particle is a measure of the time it takes for a constant force to come to rest.
We know, p = mv
Where, p = momentum
m = mass of object
v = velocity of the object
Since, momentum is directly proportional to the velocity of object:
p ∝ v
This means, that momentum increases with an increase in velocity.
If the velocity is constant, then:
p ∝ m
As the truck is losing some mass due the leakage of sand at a constant rate.
So, this decrease in mass leads in a decrease of momentum.
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a child jumps on a trampoline. draw energy bar diagrams to show the forms of energy present in the following situations.
a. the child is at the highest point.
b. the child is at the lowest point
Answer:
a
Explanation:
the modified mercalli intensity scale is used to measure _______.
Answer: Intensity of earthquakes
Explanation:
The Mercalli intensity scale is a scale to measure the intensity of earthquakes. Unlike the Richter scale, the Mercalli scale does not take into account the energy of an earthquake directly. Rather, they classify earthquakes by the effects they have.
There has been a lot of attention given to Jupiter’s moon Europa as a possible site where life might be found. What do you think that life (if there indeed is any) might be like (be sure to consider the conditions we believe exist in the ocean under Europa’s ice crust)? What ideas might you have for how scientists could explore Europa’s ocean?
Scientists could explore Europa’s oceans by using potent technologically advanced telescopes capable of deciphering the content beneath the ice crust.
What are potent technologically advanced telescopes?The latest technologically advanced telescopes are potent optical devices that allow us to discover the presence of certain compounds not only in the atmosphere of other planets in the solar system but also the content on the surface (e.g, the water content).
These telescopes contain curved mirrors that gather and focus different spectra of light from the sky such as the Webb telescope which was launched by NASA in the final of 2021.
Therefore, with this data, we can see that technologically advanced telescopes are potent optical instruments that can be used to observe the presence of different compounds including water on the surface of a planet or its satellites such as in the case of Europe which is a satellite of Jupiter.
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put the pairs of atoms in order, with the pair that has the biggest electronegativity difference between the two atoms at the top of your list
The pair that has the biggest electronegativity difference between the two atoms at the top of your list is given below:
Flourine and FranciumChlorine and CesiumNitrogen and SodiumPhosphorus and LithiumNitrogen and Sulphur.Why is higher electronegativity significant?In a covalent bond, an atom's ability to draw shared electrons is referred to as electronegativity. The strength with which an element attracts the shared electrons depends on the value of its electronegativity.
Therefore, An atom's or functional group's propensity to draw electrons to itself is known as electronegativity, which is a chemical property. An atom's electronegativity is influenced by both its atomic number and the separation of its valence electrons from its charged nuclei.
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See full question below
Put the pairs of atoms in order, with the pair that has the biggest electronegativity difference between the two atoms at the top of your list. Fluorine and Francium, Phosphorus and lithium, nitrogen and sodium, Chlorine and cesium, nitrogen and sulfur.
pulley (in the form of a uniform disk) with mass mp and radius rp is attached to the ceiling in a uniform gravitational field g and rotates with no friction about its pivot. mass m2 is larger than mass m1, and they are connected by a massless inext
a ) The relationship between the tension T1 and m1g is T1 > m1a
b ) The relationship between the magnitudes of the accelerations is I a1 I = I a2 I
Since m2 is larger than m1, the m2 will move downwards while m1 moves up. So the net force is given by,
∑ Fy = T1 - W1
m1 a = T1 - m1 g
T1 = m1 a + m1 g
So T1 > m1a
Since it is a single system connected through a pulley, the acceleration of m1 and M2 will be of same magnitude but in opposite directions.
a1 = - a2
I a1 I = I a2 I
Therefore,
1 ) T1 > m1a
2 ) I a1 I = I a2 I
The given question is incomplete. The complete question is:
A pulley (in the form of a uniform disk) with mass M, and radius Rp is attached to the ceiling in a uniform gravitational field g and rotates with no friction about its pivot. Mass M2 is larger than mass m1, and they are connected by a massless inextensible cord. T1, T2, and T3 are magnitudes of the tensions. The system is shown in the image attached.
1 ) What is the relationship between the tension T1 and m1g?
2 ) What is the relationship between the magnitudes of the accelerations?
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The compound dinitrogen oxide is a gas at room temperature. The two elements found in a sample of this gas
The two elements found in a sample of compound dinitrogen oxide, which is a gas at room temperature are nitrogen and oxygen.
What is dinitrogen oxide?Dinitrogen oxide or nitrous oxide is commonly known as laughing gas,
Dinitrogen oxide is a chemical compound, an oxide of nitrogen with the formula N₂O.
At room temperature, this gas is colorless, non-flammable gas, and has a slightly sweet scent.
Dinitrogen oxide or Nitrous Oxide is also called laughing gas or happy gas due to its intoxicating effects when inhaled.
From the chemical formula of Dinitrogen oxide which is written as;
N₂O = two nitrogen atoms and on1 oxygen atom
The compound of Dinitrogen oxide is made of;
2 atoms of nitrogen and 1 atom of oxygen
Thus, the compound of Dinitrogen oxide which is a gas at room temperature is made of two element. These two elements contained by the gas sample are known as nitrogen and oxygen.
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Answer:
nitrogen and oxygen.
Explanation:
the reason is cause i got it right
a stone is thrown horizontally from the top of a cliff 30m high with an itinal sped of 20, find the vertical speed of the stone as it hits the groudn
The molar mass of sulfur hexafluoride is 146 g/mol.
13. g of sulfur hexafluoride = 13 g / 146g/mol = 0.089 mol
The pressure of sulfur hexafluoride
P = nRT / V
P = 0.089 mol x 0.08206 Latm/mol/k x (10.0 + 273.15)K / 5.0 L
P = 0.41 atm.
The rate of change in position of an object in any course. Speed is measured because the ratio of distance to the time wherein the distance became included. Speed is a scalar amount because it has handiest route and no significance.
Velocity can be notion of as the rate at which an object covers distance. A quick-moving object has a high speed and covers a notably big distance in a given amount of time, whilst a sluggish-shifting item covers a relatively small amount of distance in the same amount of time.
The primary unit or the S.I. unit of velocity is m/s or ms¹.
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Air loss in a single vehicle (not comb. vehicle) should not be more than _________with engine off and 'brakes on'.
a) 3 psi in one minute
b) 2 psi in 45 seconds
c) I psi in one minute
d) I psi in 30 seconds
a truck moves with a speed of 90 km/h for 45 mins and 120 km/h for next 20 mins find average speed
Average speed a truck moves with a speed of 90 km/h for 45 mins and 120 km/h for next 20 mins is 40.72km/h.
Average speed = Total distance / Total time
S = 73.3/ 1.8
S = 40.72km/h
Given:
90 km/h is the speed.
Time = 0.75 hours * 45 minutes
To calculate the distance travelled, substitute the following values into the distance formula:
Distance (D) is equal to the product of speed and time, hence D = 90 * 0.75 = 33.75 km.
Given:
120 km/hr speed
Time = 20 minutes = 0.3333 hours
To calculate the distance travelled, substitute the following values into the distance formula:
Consequently, the distance travelled overall is:
Distance equals speed times time, so D = 120*0.33 D = 39.6 km.
Distance is a measurement of how far apart two things or points are, either numerically or occasionally qualitatively. Distance can refer to a physical length in physics or to an estimate based on other factors in common usage.
Use the formula d = st, or distance equals speed times time, to find the distance.
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what is the purpose of heat fixing
The main purpose of heat fixation is to kill the bacteria as it immobilizes the bacteria and adheres them to the slide being used.
What is heat fixation?Heat Fixation can be used for the fixation of single-cell organisms, most generally bacteria, and archaea. The organisms are commonly mixed with water or physiological saline to evenly spread out the sample.
Once diluted, the sample was spread onto a microscope slide. This diluted bacteria sample is referred to as a smear after it is put on a slide. After a smear is dried at room temperature, the slide is kept by tongs and passed through the flame of a Bunsen burner many times to heat-kill as well as adhere the organism to the slide.
After heating, samples are stained and imaged using a microscope. Heat fixation keeps overall morphology but not internal structures.
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Students are investigating charge separation in conductors. They have two initially neutral conducting spheres and two different kinds of cloths. The students want to determine if the cloths add the same kind of charge or opposite kinds of charge when rubbed on the spheres. Which of the following procedures will provide enough information to determine whether the cloths add the same or opposite charges?a. Rub one sphere with one cloth and the other sphere with the other cloth, and touch them together. Pull them slightly apart and see if they attract or repel.b. Rub one sphere with one cloth and the other sphere with the other cloth, and bring them close together without touching. See if they attract or repel.c. Rub each sphere once with one cloth then once with the other cloth, and touch them together. Pull them slightly apart and see if they attract or repel.d. Rub each sphere once with one cloth then once with the other cloth, and bring them close together without touching. See if they attract or repel.
Answer:
rgvy
Explanation:
urfgbv
if a galaxy is moving away its hydrogen lines will shift toward the end of the spectrum.
When a source of light waves is moving away from the observer, the light waves appear to be dispersed. If the galaxy weren't moving, the spectral lines observed in the galaxy would be at shorter wavelengths.
Because the relationship between wave frequency and wavelength is inverse, gamma rays have incredibly short wavelengths that are barely a fraction of the size of atoms, whereas other wavelengths can go as far as the universe. Regardless of the medium they travel through, electromagnetic radiation's wavelengths are commonly represented in terms of the vacuum wavelength, even though this isn't always mentioned explicitly.
The wavelength of electromagnetic radiation affects its behavior. The speed of light is equal to wavelength times frequency. Frequency multiplied by the Planck constant equals energy. 1/wavelength is the wave number in cm. Along with the wavelengths of different parts of the electromagnetic spectrum, a rough estimation of the wavelength size is displayed..
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