14,300 lines per centimeter .The reciprocal of the shortest distance between two adjacent slits, which is the maximum number of lines per centimeter,
How much visible light has the shortest wavelength?Justification: 400 nm to 400 nm. The reciprocal of the shortest distance between two adjacent slits, which is the maximum number of lines per centimeter, can be found using the following equation.
mλ = dsin (θ)
The order of diffraction, m, is represented in this equation.
denotes the incident light's wavelength.
The separation of the two slits' centers is measured in terms of d.
The angle at which the mth order would diffract is given by,.
Utilizing the visible spectrum's maximum wavelength of 700 nm, we can determine the smallest spacing necessary to observe one full order of the visible spectrum.
d = mλ / sin (θ)
In order for sin () to be the greatest and the distance d to be the smallest,
Therefore, 700 nm is the minimum separation that would allow for the capability of detecting the full first order of the visible area spectra. Using this information, we can find the maximum number of lines per centimeter, which is the reciprocal of the number of lines per cm.
n = 1/d = 1, 430,000 lines per m, or 14,300 lines per cm.
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if a 3kg bowling ball were suspended from a 5m piece of fishing line, what would be the period of oscillation
Answer:
Oscillation period 4.5 s
Explanation:
Given:
m = 3 kg
L = 5 m
g = 9.8 m/c²
___________
T - ?
Oscillation period:
T = 2π·√ (L / g)
T = 2·3.14·√ (5 / 9.8) ≈ 4.5 s
What is the range for a ionic bond?.
Ionic bond energies typically range from 170 to 1500 kJ/mol (cited estimates vary). Purely ionic compounds have spherical ions in their crystal lattices; however, if the positive ion is tiny and/or highly charged.
It will deform the negative ion's electron cloud, an effect encapsulated in Fajans' laws. An ionic bond is a stable bond created by the full transfer of the valence electron. Positive ions, known as cations, and negative ions, known as anions, are created as a result of this type of connection.
Ionic bonds, also known as electrovalent bonds, are a type of linkage created in a chemical molecule by the electrostatic attraction of ions with opposing charges. When the valence (outermost) electrons of one atom are permanently transferred to another atom, a bond of this kind is created.
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The mean distance between the earth and the sun is 1. 50×10^11 m. The average intensity of solar radiation incident on the upper atmosphere of the earth is 1390 w/m2. Assuming that the sun emits radiation uniformly in all directions, determine the total power radiated by the sun.
The total power radiated by the sun is equal to 3.93*10^26 watts.
Here, we have been told that the mean distance between the earth and the sun is = 1.50*19^11 m (i)
The average intensity of solar radiation incident on the upper atmosphere of the earth is = 1390 w/m² (ii)
The intensity of radiation emitted from a source in all directions at a distance r can be found by dividing the total energy emitted per second or power P by the surface area of a sphere of radius r. So, the intensity of radiation at a given point. Using the values of (i), (ii), we get -
= I = P/4π²
= P = 4π*(1.5*10¹¹)²*1390
= P = 3.93*10²⁶
Hence, we have found out that the power radiated by the sun is going to be 3.93*10²⁶ watts.
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if you had to drill a water well in the area pictured in fig. 12.8, where would you drill (relative to the pattern of plant growth) to find a good supply of water? why
The drill a water well in the area pictured Because there is groundwater there as secondary porosity, I want to drill on the linear soil zone with plantations.
Using a drill bit, drilling is a cutting method that makes circular holes in solid objects.
The spinning cutting tool with multiple points is frequently a drill bit. The bit is pressed against the workpiece as it rotates at rates of hundreds to thousands of revolutions per minute.
This prevents chips from the drilling hole from falling into the workpiece by pushing the cutting edge against it.
By generating low residual stresses around the hole opening and a very thin layer of highly stressed and disturbed material on the newly formed surface, drilling may have an impact on the workpiece's mechanical properties.
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a boy of mass 43.2 kg runs and jumps onto a stationary skateboard. The boy lands on the skateboard with a horizontal velocity of 4.10 m/s. The skateboard has a mass of 2.50 kg.
Using ideas about conservation of momentum,calculate the combined velocity of the boy and skateboard just after the boy lands on it.
(Pls explain. I've got my physics exams very soon)
The combined velocity of the boy and the skateboard just after the boy lands on it is 3.88 m/s.
What is velocity?Velocity can be defined as the rate of change of displacement.
To calculate the velocity of the boy and the skateboard just after the boy lands on it, we use the formula below.
Formula:
V = Mu/(m+M)............. Equation 1Where:
V = Velocity of the boy and the skatebaordM = Mass of the boym = Mass of the skateboardu = Initial velocity of the boy.From the question,
Given:
M = 43.2 kg m = 2.5 kgu = 4.1 m/sSubstitute these values into equation 1
V = (43.2×4.1)/(43.2+2.5)V = 3.88 m/sHence, the velocity of the boy and the skateboard is 3.88 m/s.
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A satellite is in orbit 35600 km above the surface of the Earth. Its angular velocity is 7.27 * 10 ^ - 5 rad/s. What is the velocity of the satellite? (The radius of the Earth is 6400 km.)
The linear velocity of the satellite at the given angular speed and position is determined as 3,053.4 m/s.
What is the linear velocity of the satellite?
The linear velocity of the satellite is calculated by applying the following equations.
v = ωr
where;
ω is the angular velocity of the satellite r is the distance of the satellite from the center of the EarthThe linear velocity of the satellite is the tangential velocity of the satellite and it is measured along the axis or circumference of the Earth.
The distance of the satellite from the center of the Earth is calculated as follows;
r = 35600 km + 6400 km
r = 42,000 km
r = 42,000,000 m
The linear velocity of the satellite is calculated as follows;
v = (7.27 x 10⁻⁵ rad/s) x (42,000,000)
v = 3,053.4 m/s
Thus, the linear velocity of the satellite depends on the angular velocity and distance.
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A sample of helium gas in a balloon is compressed from 5. 26 l to 3. 78 l at constant temperature. If the initial pressure was 4. 39 atm, what is the new pressure?.
Answer:
[tex]P_2=3.79atm[/tex]
Explanation:
According to Boyle's Law:
[tex]P_1V_1=P_2V_2[/tex]
Rewriting to find [tex]P_2[/tex]:
[tex]P_2=\frac{P_1V_1}{V_2}[/tex]
[tex]P_1=4.39atm\\V_1=5.26L\\V_2=3.78\\P_2=\frac{(4.39atm)(3.26L)}{3.78L}\\P_2=3.7861atm[/tex]
This answer follows Boyle's statement that pressure is inversely proportional to volume (V∝[tex]\frac{1}{P}[/tex]). As the volume decreases, the pressure must proportionately increase.
a coil consists of 100 turns of wire wrapped around a square frame of sides 0.5 m. the coil is centered at the origin with each sides parallel to x and y axis. find the induced emf across the coil for magnetic flux density given : .
the magnetic flux density's induced emf across the coil is equal to 5e^-2t.
What does the term "magnetic flux" mean?The magnetic flux across a surface in physics, specifically electromagnetism, is the surface integral of the normal component of the magnetic field B over that surface. The standard notation is B or. The weber is the SI unit for magnetic flux, and the maxwell is the CGS unit.
What connection exists between the magnetic flux density and the induced emf?According to Faraday's law, induced EMF is equal to the rate at which magnetic flux changes. BA = Magnetic flux = Area x Magnetic field strength. As a result, induced EMF is calculated as follows: (change in Magnetic Flux Density x Area)/change in Time.
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Ranking Task: The Electromagnetic Spectrum
Learning Goal:
To understand how the major forms of light differ in wavelength, frequency, and energy.
Introduction. The complete range of all possible forms of light is called the electromagnetic spectrum, so-named because light carries both electric and magnetic fields. Recall that light behaves as both a particle and a wave; we say that light comes in particle-like "pieces" called photons, but that each photon is characterized by a wavelength and a frequency.
Part A
We divide the electromagnetic spectrum into six major categories of light, listed below. Rank these forms of light from left to right in order of increasing wavelength. To rank items as equivalent, overlap them.
Options: radio waves, infrared, visible light, ultraviolet, X-rays, gamma rays.
The increasing order of the wavelength from left to right are as follows Gamma Rays < X-rays < UV rays < visible rays < infrared rays < microwaves < radio waves.
The electromagnetic spectrum consists of many waves which are made up of electric field and the magnetic field.
It is said that the electromagnetic wave behaves like particle as well as the wave.
The particle like pieces of the wave are called photons which contains the energy of the wave and the electromagnetic waves are primarily decided by the wavelength and the frequency of the wave.
The group of electromagnetic waves are known as electromagnetic spectrum.
The electromagnetic wave in the order of increasing wavelength are Gamma Rays < X-rays < UV rays < visible rays < infrared rays < microwaves < radio waves.
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What are the 7 stages of the rock cycle?.
The 7 stages of the rock cycle are weathering, erosion and transport, deposition of sediment, burial and compaction, melting, uplift and deformation and metamorphism.
Weathering is a process of breaking down of rocks into smaller particles. Factors like temperature extremities, water and biological involvement of nature play an important role.
Erosion is a process of breaking down of rocks into sand-like particles. In the previous stage, water was only present as a factor for reactions to take place, while in erosion it acts as a transporting agent too.
Sediment is the constant deposition of small particles of sand, pebbles, that are broken down from rocks.
Burial and compaction happens when the sand particles are sedimented, they create layers which are soon covered by another layer of new sediments and the process goes on.
As soon as the rocks reach the bottom of the earth, the temperature rises and so does the pressure.
The process of forming a crust of earth upwards due to natural forces causing movement in the tectonic plates is called uplifting.
The constant pressure and sudden movements put some sedimentary and igneous rocks under great pressure. This stage is known as deformation and metamorphism.
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A weightless spring is stretched 10 cm by a suspended 1-kg block. If two such springs are used to suspend the block, one spring above the other, to effectively provide one double-length spring, then the total stretch of the double-length spring will be
A) 5 cm.
B) 10 cm.
C) 20 cm.
D) 30 cm.
E) none of these
The total stretch of the double-length spring will be 20 cm.
What will be the total stretch of the double-length spring?kn₁ = mg
n₁ = mg/k
In second case,
keff = 1/k + 1/k
⇒keff = (k×k)/2k = k/2
So, k/2 × n₂ = mg
⇒n₂ = 2mg/k = 2n₁
n₂ = 20 cm
What is weightless?When there is no force of support acting on your body, the phenomenon of "weightlessness" takes place. You are not being supported when your body is essentially in "free fall," falling at the speed of gravity.
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What are the effects of quotas?.
Import quota effects on the importing country's producers.
In the field of economics quota signifies the time-bound restrictions governments impose on trade. Generally this is done to preserve and motivate domestic business and balance trade. Governments implies quotas by placing barriers on the value or number of exported or imported goods.
Quotas limits market reach to imported products, which significantly results usually into an increase in the domestic price paid by consumers. This leads to a decrease in consumer surplus and lower real incomes.Quotas impose by employers may become less attractive to the job applicants who are male. Quotas may also lead to low engagement and negative job attitudes among male employees. Furthermore, this perception of unfairness may also cause men to be less supportive of diversity policies than they were at their initial stage to implementing quotas. All the benefits of quotas goes to the both producers and to the lucky importers who manage to get the scarce and valuable import permits.Hence, import quota effects on the importing country's producers.
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hat is the ultimate source of energy in nuclear and geothermal energy?
The main or major source of energy in nuclear energy or geothermal energy is radioactive decay.
What is radioactive decay?Radioactive decay is the emission of energy in the form of ionizing radiation.
Radioactive decay occurs in atoms that become unbalanced, called radionuclides.
Radioactive decay is the spontaneous breakdown of an atomic nucleus resulting in the release of energy and matter from the nucleus.
Radioactive decay usually results in the release of hug amount of energy.
Thus, we can conclude that the main or major source of energy in nuclear energy or geothermal energy is radioactive decay because the process usually results in the release of hug amount of energy.
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a 32.0kg sign is attached outside of a building by four vertical ropes. how much tension (in n) would be in each individual rope to keep the sign motionless?
Answer:
the answer would be 78.4N worth of tension each.
Explanation:
we know that the sign is motionless and all of the tensions are the same, so let us represent the system with newtons second law with the y-axis pointing upwards
[tex]\sum F_y=4t-mg[/tex]
where t is the tension of one of the strings and m is the mass of the signpost. We know that the net force in the y direction is zero, so[tex]4t-mg=0\Rightarrow{t=\frac{mg}{4}=\frac{32.0*9.8}{4}=78.4}[/tex]
a 1500-nfnf capacitor with circular parallel plates 2.0 cmcm in diameter is accumulating charge at the rate of 39.0 mc/smc/s at some instant in time. part a what will be the induced magnetic field strength 9.5 cmcm radially outward from the center of the plates?
The induced magnetic field strength 9.5cm radially outward from the center of the plates is 821.052 Tesla.
We know very well that when a charge is moving with some speed in particular direction then, it will induce a magnetic field around its environment. Only moving charge is able to produce magnetic field, stationary charge only produce electric field.
We know that magnetic field is given by=(μ/2πr)×(q/t) where
μ is called as magnetic field constant,
q is the induced charge in the capacitor,
and r is the distance between the two plates
So, we have r=9.5cm=0.095m,(q/t) =39C/sec and μ=4π×10⁻⁷Tesla-m/A.
So, on putting the above values, we get
=>B=(4π×10⁻⁷ × 39)/2π×0.095
=>B=2×39/ 0.095
=>B=78/0.095
=>B=821.052Tesla.
Hence, induced magnetic field is 821.052Tesla.
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Strontium forms a face centered cubic unit cell and has a density of 2. 64 g/cm3. What is the radius of a strontium atom?.
Strontium forms a face centered cubic unit cell and has a density of [tex]2.64g/cm^{3}[/tex]. The radius of a strontium is [tex]2.136 x 10^{-8}[/tex] cm.
In physics, how is density used?Density provides an easy way to calculate a body's mass from its volume or vice versa; the mass is equal to the volume multiplied by the density (M = Vd), and the volume is equal to the mass divided by the density (V = M/d).
The structure of strontium (Sr) is similar to that of FCC. In FCC, the relationship between edge length and atomic radius is 2-a=4r2a=4r because unit cell atoms are present in the cube's corner and face centres. In this question, we are given an atomic radius and must calculate the edge length.
Here r=215pmr=215pm so a=4×2152–√=608.2pma=4×2152=608.2pm.
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a solid sphere is placed on a frictionless floor in a very long corridor and is given a quick push so that it begins to slide, without rotating, along the corridor. how would the angular speed of the sphere be changing if the floor were not frictionless? responses it would be increasing until the slipping between the sphere and the floor stops. it would be increasing until the slipping between the sphere and the floor stops. it would be increasing until the translational motion stops. it would be increasing until the translational motion stops. it would be increasing until the linear and the angular speeds become equal. it would be increasing until the linear and the angular speeds become equal. it would remain zero because the net torque is still zero. it would remain zero because the net torque is still zero. it would remain zero because the angular momentum is conserved.
If the floor were not frictionless, the sphere's angular speed would change and increase until the sliding between the sphere and the floor came to an end. As a result, correct option is C.
What is friction and what is the role it plays here?When something moves over or rolls over another solid object, there is friction. Even though friction force can be advantageous, such as the traction needed to move without slipping, they also present a sizable amount of resistance to motion.
Friction between alloys appears to be primarily caused by the attraction forces, also called as stickiness, between the contact zones of the surfaces, which are always microscopically unequal. As the defects of the rough surface rub up against the softer surface, the "welded" seams are torn apart and friction is produced.
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The complete question is:
A solid sphere is placed on a frictionless floor in a very long corridor and is given a quick push so that it begins to slide, without rotating, along the corridor. How would the angular speed of the sphere be changing if the floor were not frictionless?
A.) It would remain zero because the net torque is still zero.
B.) It would remain zero because the angular momentum is conserved.
C.) It would be increasing until the slipping between the sphere and the floor stops.
D.) It would be increasing until the linear and the angular speeds become equal.
E.) It would be increasing until the translational motion stops.
How do grasshoppers smell?.
The grasshoppers smell on the antennae.
Grasshoppers sense contact through organs located in different parts of the body such as antennae and apply on the head serti on the abdomen and receptors on the legs. The gustatory organs are located in the mouth and the olfactory organs are located in the antennae. Grasshoppers have such powerful leaping legs that people sometimes don't realize they also have wings.
While locusts use their jumping ability to gain momentum in the air most grasshoppers have fairly powerful flight abilities and make good use of their wings to evade predators. Locusts are non-venomous and pose no danger to humans. But they have strong jaws! It may be temporarily painful. Most grasshoppers mean rubbing their hind legs against their forewings. Special vertebrae on the inside of the hind legs act like a kind of percussion instrument when in contact with the thickened edges of the wings.
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4a. a rectangular block of mass m has dimensions as shown. in terms of m, a, b and c, find the rotational inertia of the block about an axis of rotation through one of the corners of the block which is perpendicular to the large faces.
Bh³/3 is the moment of inertia of a rectangular block of mass m.
Moment of inertia is a term used to describe a body's resistance to having the direction of its rotation along an axis changed by the application of a torque (turning force).
Axis options include internal, external, fixed, and moving. The moment of inertia (I), which is always represented in relation to that axis, is obtained by adding the results of multiplying each particle's mass by the square of its distance from the axis in the specific body. When determining the angular momentum of a rigid body, moment of inertia is equal to mass in linear momentum.
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temperature and light intensity are two factors that affect the rate of photosynthesis. which of these factors would you expect to have the greatest effect on the rate at which the calvin cycle proceeds, and why?
At Calvin cycle, temperature has a greater effect compared to light intensity.
Temperature regulates the rate of photosynthesis. The rate of photosynthesis increases with increased temperature. This is due to the fact that photosynthesis is a chemical reaction that is increased by temperature. At higher temperatures, the enzymes simply stop working and become denatured.
Furthermore, the temperature has an impact on the cycle. Because it relies on enzymes, temperatures that are either too high or too low will have an impact.
Meanwhile, a plant cannot photosynthesise efficiently if there is insufficient light even if there is enough of water and carbon dioxide and the temperature is appropriate. Increasing the intensity of the light raises the pace of photosynthesis until some other factor—a limiting factor—runs out.
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The reaction A(g)⇌B(g) has an equilibrium constant of Kp=2.3×10^−5.
What can you conclude about the sign of ΔG°rxn for the reaction?
a. ΔG°rxn=0
b. ΔG°rxn is negative
c. ΔG°rxn is positive
d. Nothing can be concluded about the sign of ΔG°rxn
for the reaction.
c. ΔG°rxn is positive
The reaction A(g)⇌B(g) has an equilibrium constant of Kp=2.3×10^−5, the sign of ΔG°rxn for the reaction is c. ΔG°rxn is positive.
Kp is much less than 1.This means that the response is non spontaneous in ahead direction. For, non spontaneous response, delta G is positive
Reactions with a negative ∆G launch power, because of this that that they could continue with out an power enter (are spontaneous). In contrast, reactions with a positive ∆G want an enter of power to be able to take place (are non-spontaneous.
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the oort cloud is group of answer choices a region in the same plane as the planets that contains hundreds of thousands of comets. a circular region between the orbits of mars and jupiter that contains most known asteroids. a roughly spherical region larger than the orbit of pluto that may contain a trillion comets. the cloud of gas from which the solar system formed. a vast cloud of gas that encircles the solar system at a great distance from the sun.
The Oort cloud is c. a roughly spherical region larger than the orbit of Pluto that may contain a trillion comets.
In the field of science, the Oort cloud can be described as a spherical region of stars and comets that are known to surround the Sun. It is also believed that the region of Oort cloud is bigger than Pluto which is no longer considered to be a planet.
The Oort cloud is known to expand from 2,000 to 200,000 Astronomical Unit (AU) around the Sun.
However, it is difficult to observe the Oort cloud through a telescope or the eye.
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What rhetorical device does Sojourner Truth use?.
The rhetorical device used by Sojourner Truth is rhetorical question.
Rhetorical device refers to the way an author uses to pass information to the listener, in order to persuade them to buy into his opinion.
For example, the phrase ain't I a woman, is repeated by the sojourner truth, in order to encourage the audience to think about the significance of the arguments that have been presented.
By asking this, Sojourner Truth encourages the audience to consider the treatment given to women, and in particular black women, and wonder whether it is fair.
The question is not meant to be answered, but instead it is meant to encourage the audience to reflect on a particular topic.
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you decide that you want to be able to adjust the width of the views and the data visualizations about electric vehicle sales, charging stations, and battery range. which type of layout will enable you to do that?
A horizontal layout will enable you to adjust the width of the views and objects contained.
What is a layout ?The printed or published work's layout, which establishes the hierarchy of its various graphic elements, serves as its master plan or blueprint. The layout could mean. Page Layout refers to how visual elements are arranged on a page. Comprehensive Layout refers to a suggested page layout that a designer offers to clients.
Process, product, hybrid, and fixed position layouts are the four fundamental layout types. We examine each of these types' fundamental traits in this section. Then, we look at the specifics of how some of the main types were created. Process maps. Arrangements that classify resources based on related procedures or purposes
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consider an idealized model with a bird emitting constant sound power, with intensity inversely proportional to the square of the distance from the bird. how many decibels does the sound level drop when you move 2.4 times as far away from the bird?
The sound level drops by 7.6 dB when we move 2.4 times as far away from the bird.
The decibel ratio of the measured sound intensity to the reference sound intensity is known as the sound intensity level (SIL), also known as the acoustic intensity level.
Let the initial distance be r₁ and the moved away distance be r₂. Then, r₂=2.4r₁.
Let the initial intensity be I₁ and the moved away intensity be I₂.
Then, the relationship between sound intensity and distance is,
[tex]\frac{I_2}{I_1}=\frac{{r_1}^{2}}{{r_2}^{2}}[/tex].
Let β₁ and β₂ be the two sound intensity levels. The difference in sound intensity is given by,
[tex]\begin{aligned}\beta_2-\beta_1&=\mathrm{10\;dB}\left(\log\frac{I_2}{I}-\log\frac{I_1}{I}\right)\\&=\mathrm{10\;dB}((\log I_2-\log I)-(\log I_1-\log I))\\&=\mathrm{10\;dB}\log \frac{I_2}{I_1}\end{alinged}[/tex]
Then, substitute, the I₂/I₁ value in the above equation.
[tex]\begin{aligned}\beta_2-\beta_1 &=(\mathrm{10\;dB})\log\frac{{r_1}^2}{{r_2}^2}\\&=\mathrm{10\;dB}\log\frac{{r_1}^2}{(2.4r_1)^2}\\&=(\mathrm{10\;dB})\log\left(\frac{1}{5.76}\right)\\&=-\mathrm{7.6\;dB}\end{aligned}[/tex]
The answer is -7.6 decibels.
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a resistor is connected in series with a capacitor. when a power source is applied to the resultig circuit, the capacitor is considered to befully charged after a time period equal to how many time constants
The time needed to fully charge the capacitor is about equal to 5 time constants, or 5T.
What is resistor and capacitor (RT) charging circuit?A resistor (R) and a capacitor (C) together form an RC charging circuit, which has characteristics that change exponentially with time. This means that the charging of a capacitor is not instantaneous since capacitors have i-v characteristics that depend on time.
What is time constant?
Any electrical or electronic circuit or system that receives a signal or voltage, whether continuous (DC) or alternating (AC), will experience some sort of "time-delay" between its input and output terminals.
Commonly referred to as the circuit's time delay or time constant, this delay shows how long the circuit takes to respond to an input voltage or signal.
If a resistor is connected in series with a capacitor to create an RC circuit, the capacitor will gradually charge through the resistor until the voltage across it equals the supply voltage.
About five time constants, are what it takes for the capacitor to fully charge.
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what is the maximum wavelength of light (in nanometers) that would produce an output from a photovoltaic device manufactured from a semiconductor with an energy gap of 1.02 ev?
The maximum wavelength of light that would produce an output from a photovoltaic device manufactured from a semiconductor with an energy gap of 1.02 eV is 121 nanometer.
Given,
Energy gap = 1.02 eV
Wavelength = ?
We know that,
Speed of light, c, is given as 3 * 10⁸
Planck's constant, h, = 6.626 * 10⁻³⁴
Charge on photons = 1.602 * 10⁻¹⁹
To calculate the maximum wavelength of light we will use a formula of Einstein's equation
Mathematically, Einstein's equation for photon energy is given by this formula:
E = hf = hc/λ
Where:
E is the energy.
h is Plank's constant.
λ is the wavelength.
c is the speed of light.
To find wavelength using the above formula
λ = hc/E
Now, substituting the values, we get
λ = (6.626 * 10⁻³⁴)(3 * 10⁸) / (1.02)(1.602 * 10⁻¹⁹)
λ = 1.21 * 10⁻⁷ m
In 1 nanometer we have 10⁻⁹ m
λ = 121 nm
Therefore, the maximum wavelength of light that would produce an output from a photovoltaic device manufactured from a semiconductor with an energy gap of 1.02 eV is 121 nm.
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you are sitting beside the railroad tracks as a train comes toward you at 50 mph. the train whistle has a frequency of 1388 hz. what is the frequency you hear? < 1388 hz
The frequency that we hear is 1484.74 hz.
Frequency is defined as the number of waves (here sound waves) that pass through a point in a unit time.
Also it can defined as the number of vibrations or oscillations that a body undergoes during a unit time.It is denoted by f and has the SI unit as hertz (Hz).Mathematically, frequency is the ratio of velocity with the distance f=v/d.Frequency that can be heard can be calculated by the formula,
f = {(V)/(V - Vsource)} * fsource
source = train
V = speed of the sound = 343 m/s
Vsource = 50 mph = 50 * 0.447 = 22.35 mps
fsource = 1388 hz
f = {(343)/(343 - 22.35)} * 1388
f = 1484.74 hz
Frequency that can be heard when the train passes with the speed of 50 mph is 1484.74 hz.
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The normal human body temperature is 98.6°F. A person with a fever may record 102°F. Express these temperatures in degrees Celsius.
Need an answer please
The corresponding values of the temperatures in 98.6°F and 102°F in Celsius scale are 37°C and 38.89°C
What is a temperature scale?There are three temperature scales in use , Fahrenheit, Celsius and Kelvin. Fahrenheit temperature scale is a scale based on 32 for the freezing point of water and 212 for the boiling point of water, the interval between the two is 180.
In Celsius scale the freezing point is 0°C and the melting point is 100°C. The difference is 100
The conversion of fahrenheit to Celsius scale is given by the formula C= 100( F-32)/180
Where F is the fahrenheit value of the temperature and C is the Celsius value
Therefore, for 98.6°F, C = 100(98.6-32)/180= 6660/180= 37°C
for 102°F,. C= 100(102-32)/180=7000/180= 38.89°C
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This mug is made of two layers of glass separated by empty space. it is more effective than a ceramic mug at keeping the beverage warm. why is this design more effective? the beverage has a higher temperature than the air. the air is warmer than the mug. the particles that make up the glass have no thermal energy. the empty space has no particles to transfer thermal energy.
Answer:
The empty space has no particles to transfer thermal energy
Empty space is a very poor thermal conductor
Answer:
D
Explanation:
did it on edge 2023 :)
