The frequency of a photon that has an energy of 8. 5 × 10-12 j is __________ s-1
Answers
\(2.03 1021 s-1\) is the photon's frequency.
A photon's energy (E) and frequency (v) can be calculated using the following equation:
\(E = hν\)
h is the Planck constant, which has a value of\(6.626 1034 J s.\)
We may rearrange the equation to solve for in order to determine the frequency of the photon with an energy of \(8.5 10-12 J:\)
\(ν = E/h\)
Inputting the specified values results in:
\(ν = (8.5 × 10^-12 J) / (6.626 × 10^-34 J s)\)
\(ν = 1.284 × 10^22 s^-1\)
Rounding to two significant figures yields a frequency for the photon of \(2.03 1021 s-1.\)
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Related Questions
your recovery/recycling machine has r-22 refrigerant in it. you now have to recover refrigerant from an r-410a unit. what must be done before recovery?
Answers
The recovery unit must be EPA certification for use with R-410A.
What is EPA certification?EPA certification, or 608 certification, is official recognition from the EPA that technicians are familiar with the laws and regulations governing the use and handling of ozone-depleting substances (ODS), such as refrigerants. The Environmental Protection Agency, also known as EPA, is the most influential government agency that oversees energy services. The EPA is a very important entity when it comes to the HVAC industry. Certain states in the United States require HVAC technician licensing agencies to be EPA certification.The EPA now requires EPA certification for anyone who works with systems containing refrigerants (such as heat pumps and air conditioners). Technicians cannot purchase refrigerant unless they have this authorization.To learn more about EPA certification from the given link :
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A student makes a solution of 45 mL of acid and 350 mL of water. What is the concentration of acid in the solution? Mark only one oval.
7.8 %
12.9 %
.129 %
78.7%
Answers
The concentration of acid in the solution would be 11.4%. None of the options is correct.
Concentration determinationTo determine the concentration of acid in the solution, we need to calculate the ratio of the volume of acid to the total volume of the solution and express it as a percentage.
Volume of acid = 45 mL
Volume of water = 350 mL
Total volume of solution = Volume of acid + Volume of water = 45 mL + 350 mL = 395 mL
Now, let's calculate the concentration of acid:
Concentration of acid = (Volume of acid / Total volume of solution) * 100
Concentration of acid = (45 mL / 395 mL) x 100 ≈ 11.4%
In other words, the concentration of acid in the solution is approximately 11.4%.
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In an experiment, James used the thinnest wire he could find to connect a battery to a light bulb. He found that the bulb lit up dimly. He then changed to thicker wires and repeated his experiment, noticing that the light bulb kept getting brighter. Assuming every wire was made from the same conductor (copper) which of the following explanations is most reasonable? (1 point)
Responses
O A metallic conductor becomes an insulator as it decreases in thickness.
O James must have had a bad connection because the light bulb should have illuminated to the same brightness.
O Thin wires do not allow as much electricity to flow as thicker wires.
O Small items are good insulators, while large items are good conductors.
Answers
Answer:
The most reasonable explanation is:
Thin wires do not allow as much electricity to flow as thicker wires.
This is because electrical resistance is directly proportional to the length of a wire and inversely proportional to its cross-sectional area (thickness). Thinner wires have less cross-sectional area, so they offer more resistance to the flow of electricity. This causes some of the electrical energy to be converted into heat energy, rather than being used to power the light bulb, resulting in dim illumination.
As James switched to thicker wires, the cross-sectional area of the wire increased, reducing the resistance and allowing more electricity to flow to the light bulb. This caused the bulb to illuminate brighter, as more of the electrical energy was converted into light energy.
The other options presented are not supported by the laws of electricity and are therefore not reasonable explanations.
When in use, a small dashboard lamp in a car is designed to draw 0. 4 A from the car's 12 V battery. The resistance (measured in Ω ) of this lamp filament must be approximately -
Answers
The resistance of the lamp filament is approximately 30 Ω. This can be calculated using Ohm's Law: resistance (R) = voltage (V) / current (I), where V = 12 V and I = 0.4 A.
Ohm's Law states that the resistance of a circuit element can be determined by dividing the voltage across it by the current flowing through it. In this case, the voltage is 12 V (given) and the current is 0.4 A (given). By substituting these values into the formula R = V / I, we can calculate the resistance of the lamp filament.
\(R = 12 V / 0.4 A\)
\(R ≈ 30 Ω\)
Therefore, the resistance of the lamp filament is approximately 30 Ω. This means that when the lamp is in use, it will draw 0.4 A of current from the car's 12 V battery.
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How much work must be done to stop a 925-kg car
traveling at 95 km/h?
Answers
Stored kinetic energy Ek = 1/2mV^2 = 925* 26.39^2/2 = 322,073 joule
determine how you would need to change the height of the piston to increase the pressure inside the cylinder while keeping the temperature constant?
Answers
If pressure has to be decreased the height of the piston needs to be increased which will increase volume of gas eventually decreasing the pressure.
What is pressure ?The thrust (perpendicular force on a surface) acting per unit area of a body is referred to as pressure. It can be stated mathematically as follows: Pascal is the SI unit of pressure (Pa). One Pascal is the amount of pressure one Newton of force applies to a square inch of space. Additionally, 1 P a = 1 N / m 2. In the International System of Units, pressure or stress is measured in pascals (Pa) (SI). It bears Blaise Pascal's name, a mathematician and physicist. Applied force of one newton (N) per square metre is equal to one pascal (P) (m2).
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I want the answer for the forth question
(4)
Answers
Answer:
4 d
Explanation:
because the spring is balanced with t
a car is moving at the rate of 45 miles per hour, and the diameter of its wheels is 2.5 feet. (round your answers to one decimal place.) (a) find the number of revolutions per minute that the wheels are rotating. 18 rev/min (b) find the angular speed of the wheels in radians per minute. rad/min
Answers
Number of revolutions per minute that the wheels rotates is 504rev/min and angular speed is 3160 rad/min.
Angular speed is characterized as the pace of progress of rakish relocation, and it is communicated as follows: ω = θ t where θ is the precise uprooting, t is the time and ω is the precise speed Rakish Speed Unit The unit of precise speed is radian each second. A similar recipe addresses both precise speed and rakish speed.
The unit of angular speed is radian each second. A similar recipe addresses both precise speed and rakish speed. Angular speed is a vector amount that communicates both bearing and size, while precise speed portrays greatness as it were.
It is given that rate of car is 45 miles/hr.
Firstly,we convert this into inches/min.
In 1mile=5280feet
=>45mile=45×5280
In 1 feet=12inches
=>45×5280feet=45×5280×12inches/hr
In 1 hr=.(45×5280×12)/60inches/min.
Now,we have diameter=2.5feet
=>Therefore,radius=2.5/2=1.25feet=1.25×12inches
So,angular speed=(45×5280×12)/60inches/min / 1.25×12inches
=>angular speed=(47520)/15=3168
Now,number of revolutions is =Distance/Circumference
=>Number of revolutions=(45×5280×12)/60 / 2×3.14×1.25×12
=>Number of revolutions=47520/94.2
=>Number of revolutions=504.45
Hence,number of revolutions=504 and angular speed is 3168/min.
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why Thermal energy can increase even if the average kinetic energy is constant.
Answers
Answer:
When the temperature of an object increases, the average kinetic energy of its particles increases. When the average kinetic energy of its particles increases, the object's thermal energy increases. Therefore, the thermal energy of an object increases as its temperature increases.
The thermal energy will still increase even if the average kinetic energy remains constant.
This is based on relationship between kinetic energy and thermal energy.
Kinetic energy is defined as the energy possessed by an object or body as a result of its motion. Meanwhile, Thermal energy is the heat energy that is produced as a result of an increase in temperature that makes the atoms and molecules in that motion to move at a faster speed thereby colliding with themselves.
Now, for example if we are boiling water at a fixed temperature, it will be noticed that gradually, the kinetic energy of the water molecules will start to increase.When this happens, it means that the thermal energy of the system will also increase.
Now, if the average kinetic energy of the particles remains constant, the thermal energy will still increase because more heat is still being generated in addition to the previous one.This means that there will still be a gradual increase in thermal energy although it may not be as much as if the temperature was further increased but nevertheless it will still increase.Read more at; brainly.com/question/17534486
8 N to the Lefr and 4 N to the right find the net force is this balanced
Answers
Answer:
4N to the left. No it is not balanced.
Explanation:
8 -4 = 4 N of force
Balanced would be if they equaled zero, so 8 to the left and 8 to the right
How are faults that occur in the middle of tectonic plates different from plate boundaries?
Answers
Divergent boundaries – where two plates are moving apart.
Transform boundaries – where plates slide passed each other.
:)
Causes of Earthquake
An earthquake is caused by a sudden slip on a fault. The tectonic plates are always slowly moving, but they get stuck at their edges due to friction.
Five causes of earthquake?
1. Volcanic Eruptions. The main cause of the earthquake is volcanic eruptions.
2. Tectonic Movements. The surface of the earth consists of some plates, comprising of the upper mantle
3. Geological Faults
4. Groundwater extraction – decrease in pore pressure.
5. Groundwater – increase in pore pressure.
6. Heavy rain.
7. Pore fluid flow.
8. High CO2 pressure.
9. Building dams.
Explanation:
Now, Boundaries between tectonic plates are made up of faults. which are associated with the various types of fault, normal, reverse and strike-slip faults
More so, Plate boundaries are always faults, but not all faults are plate boundaries.
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To celebrate a solid performanceon your second thermodynamics exam, you grab a 750mL bottle of champagne from the store (at room temp 25degrees). Being a connoisseur in such matters, you insist it be chilled to 8 degrees celsius in a bucket of ice at 0 degrees celsius. How much ice must melt before you pop the bubbly? (The subject is thermodynamics)
Answers
In order to chill a 750mL bottle of champagne using a bucket of ice at 0 degrees Celsius, approximately 249 grams of ice must melt. The specific heat capacity of ice is approximately 2.09 J/g°C.
To determine the amount of ice that needs to melt, we can use the principles of thermodynamics. First, we need to calculate the heat lost by the champagne and the heat gained by the melting ice. The heat lost by the champagne can be calculated using the equation Q = mcΔT, where Q is the heat lost, m is the mass of the champagne, c is the specific heat capacity of champagne, and ΔT is the change in temperature. Similarly, the heat gained by the ice can be calculated using the same equation, where m is the mass of the ice and c is the specific heat capacity of ice.
Given that the initial temperature of the champagne is 25 degrees Celsius and the final temperature is 8 degrees Celsius, ΔT for the champagne is 25 - 8 = 17 degrees Celsius. The specific heat capacity of champagne is approximately the same as water, which is 4.18 J/g°C. Therefore, the heat lost by the champagne is Q = (750g)(4.18 J/g°C)(17°C) = 53,595 J.
Since the ice is at 0 degrees Celsius, ΔT for the ice is 0 - (-8) = 8 degrees Celsius. The specific heat capacity of ice is approximately 2.09 J/g°C. Therefore, the heat gained by the ice is equal to the heat lost by the champagne, which is 53,595 J. Using the equation Q = mcΔT and solving for the mass of ice (m), we can rearrange the equation to m = Q / (cΔT). Plugging in the values, we get m = 53,595 J / (2.09 J/g°C * 8°C) ≈ 249 grams.
Therefore, approximately 249 grams of ice must melt in order to chill the champagne from 25 degrees Celsius to 8 degrees Celsius in a bucket of ice at 0 degrees Celsius.
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A hair dryer draws 11 A when it is connected to 120 V. If electrical energy costs $ 0.09/kW·h, what is the cost of using the hair dryer for exactly 15 min?
Free brainliest, i was planning on answering this myself anyway.
Answer: $0.3
Explanation:
Operating Cost ($) = Energy Use (kWh) x Electric Rate
1. convert Amps to watts
11 x 120= 1320
2. convert watts to kilowatts
1320/1000=1.32
3. convert the time to hours
15/60=0.25
4. Multiply the time and the kilowatts
0.25 x 1.32= 0.33kWh
5. find the cost
0.9 x 0.33= $0.297
Answers
Answer:
The cost of using the hair dryer for 15 minutes is \(\$3.6\bar 6\)
Explanation:
The parameters given in the question are;
The electric current drawn by the the air dryer, I = 11 A
The voltage to which the hair dryer is connected, V = 120 V
The duration of usage of the hair dryer = 15 minutes = 60 minutes /4 = 1 hour/4 = 0.25 hour
The electrical energy costs $0.09/kW·h
The power consumed by the hair dryer = I × V = 11 × 120 = 1320 Watts = 1.32 kW
The energy used by the hair dryer in 15 minutes (0.25 hour) = 1.32 × 0.25 0.33 kW·h
The energy used by the hair dryer in 15 minutes (0.25 hour) = 0.33 kW·h
The energy cost = $0.09/(kW·h)
Therefore;
The cost of using the hair dryer for 15 minutes (0.25 hour) = 0.33 kW·h/($0.09/(kW·h)) = $33/9 = $3 2/3 = $3.6\(\bar 6\).
Velocity vs time given information in the velocity vs time graph
Answers
The velocity vs. time graph provides information about how the velocity of an object changes over time.
The velocity vs. time graph is a graphical representation of the object's velocity at different points in time. The graph consists of two axes: the vertical axis represents velocity, and the horizontal axis represents time. By examining the graph, you can determine various characteristics of the object's motion.
For example, a positive slope on the graph indicates that the object is moving in a positive direction with increasing velocity. A negative slope indicates motion in the opposite direction or decreasing velocity.
A horizontal line represents constant velocity, as the slope is zero. The steepness of the slope indicates the rate at which the velocity is changing. A steeper slope indicates a faster change in velocity.
The velocity vs. time graph is a valuable tool in understanding the motion of objects. By analyzing the graph's shape and slope, you can determine important information such as acceleration, deceleration, constant velocity, and direction of motion.
It provides a visual representation that aids in interpreting and predicting an object's motion over time.
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The electric field from a sheet of charge is perpendicular to the sheet and has a constant magnitude of Q/(Aeo), where A is the area of the sheet and Q is the charge on the sheet. If the sheet has an area, A=32.93 cm2, and a charge of 20.93 microC, what force, in nanoNewtons, would an electron experience due to this electric field?
Answers
The exercise tells us that the electric field is given by the following equation:
\(\vec{E}=\frac{Q}{A\epsilon_0}\)And it also gives us, A and Q. Thus, our electric field inside the capacitor is:
\(E=\frac{20.93*10^{-6}}{(32.93*10^{-4})*(8.85*10^{-12})}=718181521.8\frac{V}{m}\)As we know, the electric force can be written as:
\(F=q.E\)The charge of an electron is a constant, which is q=1.6*10^(-19) C.
Finally, our force can be written as:
\(F=1.6*10^{-19}*718181521.8=1.149*10^{-19}=0.00001149microN\)Our final answer is 0.00001149 micro Newtons
A rock is thrown upward with an initial velocity of 29m/s. What is the rock's maximum height?
43 m
35.8 m
14.5 m
O 58 m
Answers
0 = 29^2 - 2 x 9.8 x s
19.6 s = 841
s = 841/19.6 = 42.9 m
Write ten sentences that is happening
around you now
Answers
2. My brother is doing his online schoolwork for the day.
3. I am taking a break from my online lessons.
4. During my break, I am brushing my hair and teeth.
5. I am laying in bed.
6. I can hear the strong wind blowing outside.
7. My cats are cuddling up to my feet.
8. There’s a spider spinning a web in my room.
9. My dog is barking at the wind.
10. My dad is busy finishing his work.
I hope this is helpful :)
an ultrashort pulse has a duration of 7.20 fs and produces light at a wavelength of 556 nm. what is the momentum of a single photon in the pulse?
Answers
The momentum of a single photon in the pulse is 1.19 * 10^-27 kg m/s.
It is the quantity of motion of a moving body, measured as a product of its mass and velocity.
How to calculate the momentum of a single photon in the pulse?
Wavelength of light is given,
λ = 556nm = 556 * 10^-9m
Wavelength and momentum (p) are related by
λ = h/p
Where h is the planck constant = 6.63 * 10^-34 m^2 kg/s
So, the momentum is
p = h/λ
\(\frac{6.63*10^{-34} }{ 556*10^{-9}}\)
p = 1.19 * 10^-27 kg m/s
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what is the state of the electrical charge when a neuron is at resting potentia
Answers
When a neuron is at resting potential, the state of the electrical charge is negative inside the neuron compared to the outside
Because of an unequal distribution of ions like potassium (K+) and chloride (Cl-) inside and outside the neuron, the interior of the neuron is negatively charged at resting potential. The membrane of the neuron is selectively permeable, permitting certain ions to pass while preventing others from doing so. A gradient in electrochemistry results from this.
Ion channels, notably the sodium-potassium pump, which actively transfers sodium ions (Na+) out of the neuron and potassium ions (K+) into the neuron, are responsible for maintaining the resting potential. As a result, the neuron produces an excess of negative charge within and an excess of positive charge outside.
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Help PLZ!!!! The ability of something to potentially catch on fire is ___________.
A. physical change
B. physical property
C. Chemical change I chose this one and it was wrong.
D. Chemical Property
Answers
Answer:
Chemical Property
Explanation:
Examples of chemical properties include flammability, toxicity, acidity, reactivity (many types), and heat of combustion.
Give one similarity and one
difference between water treatment
using a septic system and water
treatment using a water treatment
plant.
Answers
One similarity between water treatment using a septic system and water treatment using a water treatment plant is that both methods aim to treat and purify wastewater before it is discharged, and one difference between these two methods is, the scale of the treatment process.
What is treating water using a septic system?A septic system is used for individual homes or small communities, whereas a water treatment plant is designed to treat wastewater from larger communities or cities, a septic system is a decentralized system, whereas a water treatment plant is a centralized system.
Hence, the similarity is that both methods aim to treat and purify wastewater before it is discharged, and the difference between these methods is the scale of the treatment process.
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find the components to write this vector in unit vector notation: 63.5 A please help
Answers
Vector is perpendicular to x axis or i component.
Hence i component is 0
j component is 63.5
\(\\ \sf\longmapsto \overrightharpoon{A}=0\hat{i} +63.5\hat{j}\)
Convert 55 miles into inches
Answers
Answer:
3.485e+6 inches. hope this helps
Answer:
What I got was a big number but it got around 3.485e+6
Explanation:
Which of the following determines the identity of an atom?
A. atomic mass
B. mass number
C. atomic number
D. charge
Answers
a piano emits sound waves with frequencies that range from a low of about 28 hz to a high of about 4,200 hz. the speed of sound in air is approximately 343 m/s. what is the longest wavelength of sound produced by a piano? (in m)
Answers
From a low frequency of about 28 hz to a high frequency of roughly 4,200 hz, a piano emits sound waves. In air, sound travels at a speed of around 343 m/s. In other words, the piano's sound has a 12.25 m wavelength at its longest.
What is wavelength?A waveform signal's wavelength, which is the distance between two identical locations (adjacent crests) in the succeeding cycles, determines whether it is sent through space or via a wire. Typically, in wireless systems, this length is specified in meters (m), centimeters (cm), or millimeters (mm) (mm).
A velocity of wave is given as,
V = λ .f
V = Velocity of wave = 343 m/s
f = frequency of wave = 28hz and 4200hz
λ = wavelength = ?
λ\(_{min}\) = V/f
λ\(_{min}\) = 343/4200
λ\(_{min}\) = 0.0816 m
λ\(_{max}\) = V/f
λ\(_{max}\) = 343/28
λ\(_{max}\) = 12.25 m
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A sound wave is traveling in air at 343 m/a and the wavelength is 320 nm what is the frequency?
Answers
The frequency of the sound wave is 1.07 × 10⁹ Hertz
What is the frequency of the sound wave?Wavelength is simply the distance over which the shapes of waves are repeated.
From the wavelength, frequency and speed relation,
λ = v ÷ f
Where λ is wavelength, v is velocity/speed and f is frequency.
Given that:
Speed of the wave v = 343 m/sWavelength of the wave λ = 320 nm = 3.2 × 10⁻⁷ mFrequency of sound wave = ?Plug values into the above formula.
λ = v ÷ f
f = v / λ
f = ( 343 m/s ) / ( 3.2 × 10⁻⁷ m )
f = 1.07 × 10⁹ Hz
Therefore, the frequency is 1.07 × 10⁹ Hz.
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With all of the electric wires and current running through your house, what direction would a compass point if you were standing in the middle of your room? Why is this? What property of magnetic fields does this demonstrate, and how would the magnetic field lines look in this region?
Answers
1) The direction it points depends on the direction of the electric current in the wires.
2) The magnetic field lines in the region would form circles around each individual wire carrying current.
3) This is because of the right-hand rule
Where does the current point?The magnetic field produced by the electric current forms a circular magnetic field around the wire in accordance with the right-hand rule, which is applicable to conventional current flow.
The current's flow direction determines the direction of the magnetic field lines. The curled fingers of your right hand, which is holding the wire with your thumb pointing in the direction of the current flow, would point in the direction of the magnetic field.
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nich
Imagine that two birds leave the
same tree at the same time. They
both fly at 10 km/h for 5 minutes.
Why don't they end up at the
same place?
Answers
Answer:
hello
Explanation:
Seventh grade QQ.4 Commas with coordinate adjectives 5L5
Insert one comma to separate the coordinate adjectives.
Typical golf caddie responsibilities include carrying clubs, cleaning balls,
calculating distances and scores, and even replacing the divots-pieces of
grass and dirt that have been cut loose by the swift forceful strikes of golf
clubs.
Answers
Answer:
Typical golf caddie responsibilities include carrying clubs, cleaning balls,
calculating distances and scores, and even replacing the divots - pieces of
grass and dirt that have been cut loose by the swift, forceful strikes of golf
clubs.
The First Law of Thermodynamics is generally referred to as _____.
First Law of Motion
Joule's Law E = IR2
Law of Conservation of Matter and Energy
Universal Gravitation
PLS HELP....
Answers
Answer:
ok
Explanation:
The First Law of Thermodynamics is generally referred to as the "Law of Conservation of Matter and Energy."