when people visit the local tanning salon, they absorb photons of ultraviolet (uv) light to get the desired tan. what are the frequency and wavelength of a uv photon whose energy is 5.9 * 10-19 j?
Answers
According to the given statement the frequency of the UV photon is approximately 8.91 * 10^14 Hz, and its wavelength is about 337 nm.
To answer your question, we need to know the formula for calculating the frequency and wavelength of a photon. The formula is E = hf, where E is the energy of the photon, h is Planck's constant, and f is the frequency of the photon. We can rearrange this formula to solve for frequency: f = E/h.
So, using the energy given in the question (5.9 * 10-19 J) and Planck's constant (6.626 x 10-34 J*s), we can calculate the frequency of the UV photon: f = (5.9 * 10-19 J) / (6.626 x 10-34 J*s) = 8.90 x 1014 Hz.
To calculate the wavelength, we can use the formula c = λf, where c is the speed of light (3.00 x 108 m/s), λ is the wavelength, and f is the frequency. Rearranging this formula to solve for wavelength, we get λ = c/f.
Plugging in the frequency we just calculated, we get λ = (3.00 x 108 m/s) / (8.90 x 1014 Hz) = 3.37 x 10-7 m, or 337 nm.
So the frequency of the UV photon whose energy is 5.9 * 10-19 J is 8.90 x 1014 Hz, and its wavelength is 337 nm.
We can say that photons are the smallest unit of light, and they are responsible for carrying electromagnetic radiation. The frequency of a photon refers to how many waves pass a given point in a second, and it is measured in hertz (Hz). The wavelength of a photon refers to the distance between two consecutive peaks or troughs of a wave, and it is usually measured in meters or nanometers. In the case of UV light used in tanning salons, the frequency is higher and the wavelength is shorter than visible light, making it more energetic and capable of causing skin damage if overexposed.
The energy of a UV photon can be determined using the equation E = hf, where E is the energy, h is Planck's constant (6.626 x 10^-34 Js), and f is the frequency. To find the frequency, you can rearrange the equation as f = E/h.
Given the energy E = 5.9 * 10^-19 J, you can calculate the frequency as follows:
f = (5.9 * 10^-19 J) / (6.626 * 10^-34 Js) ≈ 8.91 * 10^14 Hz.
Now, to find the wavelength, you can use the equation c = λf, where c is the speed of light (3 * 10^8 m/s) and λ is the wavelength. Rearranging the equation as λ = c/f:
λ = (3 * 10^8 m/s) / (8.91 * 10^14 Hz) ≈ 3.37 * 10^-7 m or 337 nm.
So, the frequency of the UV photon is approximately 8.91 * 10^14 Hz, and its wavelength is about 337 nm.
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Related Questions
Which units represent density? Select all that apply.
Answers
Answer:
D=M/V. That's the formula. Density is expressed, in cubic centimeters.
Explanation:
Answer:g/m³
g/cm³
-kg/L
-kg/cm³
Density in physics, is defined as the mass of the object over its volume. Density is considered as how much matter is contained in a single object by its volume or the matter that it occupies.
D = m / v
Explanation:
a generator produces 33.0 v when turning at 860 rev/min. what emf does it produce when turning at 490 rev/min?
Answers
When turning at 490 RPM, the generator produces an EMF of 18.7 V.
When a generator produces 33.0 V while turning at 860 rev/min, the emf the generator produces when turning at 490 rev/min is 18.8 V.
The equation relating EMF with angular velocity is as follows:EMF=BAwN EMF = BAwN EMF = BAwN Where,B is the strength of the magnetic field A is the area of the coilw is the angular velocityN is the number of turns in the coil It can also be expressed as EMF = k × w EMF = k × w where k is the constant that depends on the strength of the magnetic field, the area of the coil, and the number of turns in the coil. Therefore, for the generator given, EMF = k × w EMF = k × wIt can be written asEMF1/EMF2=w1/w2 EMF1/EMF2 = w1/w2where EMF1 and w1 are the initial values and EMF2 and w2 are the final values. Substituting the given values, we getEMF1/EMF2=w1/w2 EMF1/EMF2 = w1/w218.8/33 = 490/8600.53333 = 0.56976EMF2 = EMF1/w1/w2 EMF2 = EMF1/w1/w2EMF2 = 33/(0.56976)EMF2 = 18.8Therefore, the emf the generator produces when turning at 490 rev/min is 18.8 V.
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What is mass in science definition?
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The amount of matter in a thing is measured by its mass in science. It is frequently referred to as an object's "weight," however weight and mass are not the same thing. The force imposed on an object by gravity is represented by its weight, whereas mass is a scalar quantity that remains constant regardless of the object's location.
To better comprehend mass, it is necessary to distinguish it from weight. Weight is a measure of the force imposed by gravity on an object, and it varies based on the object's location. An object, for example, weighs less on the Moon than on Earth because the Moon has less mass and thus less gravitational force. Nonetheless, the object's mass remains the same regardless of where it is located.
The kilogramme is the unit of mass in the International System of Units (SI) (kg). However, in physics, the unit of gramme (g) or atomic mass unit (u) is commonly used, which is defined as one-twelfth of the mass of a carbon-12 atom.
The mass of an object can be used to compute its kinetic energy, potential energy, and momentum in physics and chemistry. Furthermore, mass is important in Einstein's theory of general relativity, where it is related to the curvature of spacetime.
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Can someone help me with this question
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Answer:
extrusive igneous rock
Question 51 pts Which of the following illustrates an increase in potential energy? Group of answer choices a wind-up toy winding down an apple dropping from a tree a person climbs a set of stairs a firecracker explodes
Answers
Answer:
a person climbs a set of stairs
Explanation:
A person climbing a set of stairs increases his height, which also increases his gravitopotential energy. Gravitopotential energy increases with height as you move further away from the surface of the Earth.
A wind up toy winding down is already expending its stored up potential energy. An apple falling from a tree is already losing its gravitipotential energy. A firecracker that explodes is already using up the potential energy stored in its chemical. All these are cases where the potential energy is decreasing.
Name two sub-kingdoms of plant kingdoms
Answers
Answer:
⭐. cryptogams ( non-flowering & non-seed bearing)
⭐. phanerogams ( flowering & seed bearing)
What fitness level is helpful to know when a person is starting an exercise program
Answers
Answer:
There are various areas that should be considered to access the fitness level of an individual.
Explanation:
Knowing the specific details can help an individual to set realistic fitness goals, monitor their progress, and retain motivation. Fitness is typically measured in four main areas: cardiovascular fitness, muscle strength and endurance, flexibility, and composition of the body. It is important to evaluate these vital components of fitness so that one gets a fair knowledge of present fitness level and plan for the future accordingly.
What is the distance between two spheres, each with a charge of 1. 05 X 10^-7 C when the force between them is 0. 40 N?
Answers
Answer:
Answer:please mark as brainliest
When 3.5 g of liquid water is cooled from 90c to 20c how much energy is lost?
(Choose only one answer)
Answers
The amount of heat or energy that is lost when the water is cooled is 1,024.1 J.
What is the amount of heat lost?
The amount of heat lost is calculated by applying the formula for heat capacity of water as shown below;
Q = mcΔT
where;
m is the mass of the waterc is the specific heat capacityΔT is the change in temperature of the waterThe amount of heat or energy that is lost when the water is cooled is calculated as follows;
Q = 3.5 g x 4.18 J/gC x (90 C - 20 C)
Q = 1,024.1 J
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An image is forméd using a converging lens with a focal length of 14 cm. The object is a distance of 2 cm from the lens. What is the magnification of the image? Your Answer:
Answers
Magnification of the Imagean image is formed using a converging lens with a focal length of 14 cm.
The object is at a distance of 2 cm from the lens.
We have to find the magnification of the image.
Magnification is defined as the ratio of the height of the image to the height of the object.
Magnification = height of the image / height of the object In this problem, the height of the object is not given.
But, we can use the lens formula to calculate the height of the image.
Lens formula is given by:
1/f = 1/v - 1/u
Where,
f = focal length of the lens
v = distance of the image from the lens
u = distance of the object from the lens
Given,f = 14 cm
u = -2 cm (as the object is placed at a distance of 2 cm to the left of the lens)
v = ?
The image will be smaller than the object.
Magnification = (-v) / u= (-7/2) / (-2)= 7/4
the magnification of the image is 7/4.
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A scientist and an engineer are both working on projects that involve the snowfall in an area. Describe a job
that the engineer might do related to the snowfall,
PLEASE HELP
Answers
Calculate the kinetic energy of a truck that has a mass of 2900 kg and is moving at 55 m/s.
Answers
Answer:
2900 divided by 55 is 52.727272727272727
can a person run at a speed of 20 meters per second
Answers
Answer:
No
Explanation:
The fastest recorded time for a person to run 100 metres is 9.58 seconds, which is the equivalent of 10.4 metres per second
Answer:
No
Explanation:
Humans can run as fast as 19.3m/s, using their full possible energy.
What is the supply voltage?
Answers
Answer:
[sə′plī ‚vōl·tij] (electricity) The voltage obtained from a power source for operation of a circuit or device.
Explanation:
hope this helps :)
In each hand you hold a 0.16-kg peach. What is the gravitational force exerted by one peach on the other when their separation is (a) 0.25 m and (b) 0.50 m?
Answers
The gravitational force exerted by one peach on the other can be calculated using the formula F = G(m1m2)/r²,
where F is the force, G is the gravitational constant (6.67 x 10^-11 Nm²/kg²), m1 and m2 are the masses of the two peaches, and r is the distance between their centers of mass.
(a) When the separation between the peaches is 0.25 m, the force exerted by one peach on the other is:
F = (6.67 x 10⁻¹¹ N×m²/kg²) × (0.16 kg × 0.16 kg) / (0.25 m)² = 1.07 x 10⁻⁹N
(b) When the separation between the peaches is 0.50 m, the force exerted by one peach on the other is:
F = (6.67 x 10^-11 N×m²/kg²) ×(0.16 kg × 0.16 kg) / (0.50 m)²= 2.67 x 10⁻¹⁰ N
Therefore, the gravitational force exerted by one peach on the other decreases as the distance between them increases. This is because the force of gravity is an inverse square law, meaning that the force decreases proportionally to the square of the distance between the objects.
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PLEASE HELP. A little boy is being pulled in a wagon by his mother. Suddenly, the little boy's mother stops to watch for cars
before she crosses the street. The little boy's body continues to move forward in the stopped wagon until his
feet push against the front of the wagon. The forward movement of the boy's body shows -
Answers
Answer:
i think it shows the weight of the boy being pushes on the given side of the wagon
Answer:
The Law Of Intera
Explanation:
The goalkeeper is the only player allowed to use their hands OA True OB. False
Answers
Answer:True
Explanation:
what is latent inhibition? the time it takes to move from a broad idea to a specific idea that can be implemented
Answers
An individual's capacity to notice and learn about a stimulus is diminished if they have previously been exposed to it in a neutral or irrelevant environment. This phenomenon is known as latent inhibition.
With the use of traditional training procedures, latent inhibition is frequently examined. In a typical experiment, an individual or an animal is repeatedly exposed to an unimportant stimulus with no noticeable results. In following trials, the neutral stimulus is coupled with a physiologically important stimulus (such as food or an electric shock).
The goal is to determine how the subject's capacity to build an association between the neutral stimulus and the important stimulus is affected by the subject's prior exposure to the neutral stimulus. According to the phenomena of latent inhibition, prior exposure to a stimulus without any discernible effects results in a reduction in attention or learning when the stimulus is subsequently encountered in a pertinent context.
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At what point on the position-time graph shown is the object's instantaneous velocity smallest?
A
D
C
B
Answers
Which force does not operate at a distance of 1 m?
A. Weak nuclear
O B. Electric
C. Gravitational
D. Magnetic
Answers
Answer:
A
Explanation:
show how three identical 6 resistors must be connected tho have the following effective resistance values 9 and 4 ohms
Answers
Answer:
connect two 9 ohms resistance in series now it becomes 18 ohm
which of the following is true of inertia
a) it is a property of motion
b) it is measured by weight
Answers
Answer:
it is a property of motion
A 150-kg object takes 1.5 minutes to travel a 2,500-meter straight path. it begins the trip traveling 120 meters per second and decelerates to a velocity of 20 meters per second. what was its acceleration? responses −1.11 m/s2 negative 1.11 meters per second squared, −0.3 m/s2 negative 0.3 meters per second squared, 1.11 m/s2 plus 1.11 meters per second squared, 80 m/s2
Answers
Answer:
A. −1.11 m/s2
Explanation:
To calculate the object's acceleration, we can say:
acceleration = (final velocity - initial velocity) / time
The object's initial velocity is 120 m/s, its final velocity is 20 m/s, and the time it takes to travel the 2,500-meter path is 1.5 minutes, or 90 seconds (1.5 x 60 = 90).
Therefore:
acceleration = (20 m/s - 120 m/s) / 90 s = -1.11 m/s^2
Note
The negative sign, means the object is decelerating and not accelerating because the object is slowing down during the trip.
it is decreasing its speed as it travels, so it's slowing down over time. The absolute value of -1.11 is also called deceleration.#SPJ4
How does solar energy work
Answers
Answer:
When the sun shines onto a solar panel, energy from the sunlight is absorbed by the PV cells in the panel. This energy creates electrical charges that move in response to an internal electrical field in the cell, causing electricity to flow.
Throw a paper ball towards a hard wall. a) Did the wall apply force on the ball? If yes, then what is the name of the force? b) What are the effects of the force applied by the wal
Answers
Answer:
Reaction force
Explanation:
A ball is thrown against a wall: The ball puts a force on the wall (action force), and the wall puts a force on the ball (reaction force) so the ball bounces off
Help me to answer this pls
Answers
here is the answers, hope this helps you.
is it possible to decrease a density of a certain metal. if so how
Answers
Answer:
Density can be decreased by increasing the volume and keeping the mass same .
ssm what is the spring constant of a spring that stores 25 j of elastic potential energy when compressed by 7.5 cm?
Answers
The spring constant for a spring that can store 25J of elastic potential energy when compressed by 7.5 cm is 8.9*10³ N/m.
given,
energy stored in the spring = E = 25J
compressed distance = x = 7.5cm = 0.075m
E = 1/2 * kx²
K = 2E/x²
= 8.9*10³ N/m
The energy that an item retains due to its position in relation to other objects, internal tensions, electric charge, or other reasons is known as potential energy in physics.
Potential energy can take many different forms. Some examples are an object's gravitational potential energy, the elastic potential energy of a stretched spring, and the electric potential energy of an electric charge in an electric field. The joule, denoted by the letter J in the International System of Units (SI), is the unit of energy.
Although it has connections to the Greek philosopher Aristotle's concept of potentiality, the word "potential energy" was first used in the 19th century by the Scottish engineer and scientist William Rankine.
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A massless rod is fixed to a wall on one end. A cable is attached to the wall and the center of the rod. The cable makes an angle of 60° to the wall. If the maximum tension of the cable is 10 n, what is the maximum amount of weight that can hang from the end of the rod?.
Answers
The most extreme sum of weight that can hang from the conclusion of the pole is 8.66 N.
The most extreme sum of weight that can hang from the conclusion of the bar is calculated as follows.
Apply the equation for pressure utilizing Newton's moment law of movement.
Newton's moment law of movement states that the constrain experienced by a question is specifically relative to the item of the mass and speeding up of the question.
T sinθ = W
Where T is maximum tension in cable
θ is angle of inclination of cable
W is weight of cable
10 sin (60) = W
8.66 N = W
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There is a tender for building a new mall in Alexandra, what are the three main stakeholders and their functions required to ensure the completion of the project. 1.2 During the construction of a road in a particular community. who represent the community and what is their duties. 1.3 Before any type of Civil Engineering project is carried out, what needs to be done ensure the viability of the project. 1.4 The contractor has won a tender for construction of a Bridge, show its hierarchy of working when carrying out the work. 1.5 A 50 km road construction is to take place, the duration of the project is 10 days, draw the bar chart of the project. Question 2 (10) 2.1 Why is Risk Management necessary in a project?
Answers
For a successful final touch of a construction venture, key stakeholders consisting of the consumer/proprietor, architect/layout group, and creation contractor are crucial. Risk management is necessary to perceive and mitigate capacity risks, ensuring project success and minimizing disruption
The 3 important stakeholders for the development of a new mall in Alexandra are:
Client/Owner: The patron/proprietor is the entity or agency initiating the mission. Their feature is to define the task necessities, provide the important funding, and oversee the entire task. Architect/Design Team: The architect and layout crew are answerable for developing the architectural and structural plans for the mall.Construction Contractor/Builder: The production contractor is chargeable for executing the construction sports and bringing the mall to reality.During the construction of an avenue in a particular network, the network is represented by:
Local Authorities: The local authorities, which include the municipal or city council, represent the community's pastimes. Their duties consist of engaging with the network to apprehend their needs and issues associated with the road construction project.
Before any sort of Civil Engineering mission is executed, the subsequent steps want to be taken to ensure the viability of the challenge:
Feasibility Study: A feasibility observation is performed to assess the technical, financial, criminal, and environmental components of the venture. Environmental Impact Assessment: An environmental impact evaluation is performed to evaluate the capacity environmental consequences of the undertaking.Design and Engineering: Detailed layouts and engineering paintings are conducted to develop the challenge plans and specifications.Cost Estimation and Budgeting: Cost estimation is carried out to decide the overall undertaking price, together with substances, hard work, devices, and other expenses.The hierarchy of running for a contractor sporting out the development of a bridge typically consists of the subsequent degrees:
Project Manager: The undertaking supervisor oversees the complete creation mission, which includes making plans, scheduling, budgeting, and coordinating resources.Site Manager: The website online supervisor is accountable for on-site operations and coordination. They control the daily sports, supervise the development group, screen development, and ensure adherence to safety and high-quality requirements.Foremen and Supervisors: Foremen and supervisors are chargeable for particular areas or trades inside the production process. They supervise the people, coordinate duties, and make sure that work is done in step with the mission plans and specs.Skilled Workers: Skilled employees consist of carpenters, masons, electricians, welders, and other specialized tradespeople who perform the actual construction obligations.Laborers: Laborers are liable for assisting skilled people, wearing materials, and appearing fashionable hard work obligations required for the construction work.To draw the bar chart (also referred to as a Gantt chart) for a 50 km street creation undertaking with a duration of 10 days, the chart could represent the obligations and their respective intervals. However, a standard bar chart for an avenue creation undertaking may also include duties including surveying, excavation, laying subbase, paving, and street markings, amongst others.
The horizontal axis represents the timeline (in days), and the vertical axis represents the responsibilities. Each undertaking is represented with the aid of a horizontal bar that suggests its length.
Question 2 (10):
2.1 Risk control is vital in a venture for the following motives:
Identify and Assess Risks: Risk control allows perceive capability risks and investigate of their potential impact on the assignment.Mitigate and Control Risks: Through chance management, proactive measures can be taken to mitigate and control dangers. Enhance Decision-Making: By considering risks and their capacity outcomes, danger control gives treasured information for choice-making. Improve Project Performance: Effective risk control contributes to better mission performance by minimizing disruptions, delays, and price overruns. Stakeholder Communication: Risk management helps communication with project stakeholders by supplying transparency about capacity risks and the way they'll be controlled.Overall, change management is important for figuring out, analyzing, and responding to risks in a systematic and proactive manner. It enables ensuring task success by using lowering uncertainties and maximizing opportunities for task delivery within the preferred parameters.
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