WF4-358 is a white dwarf in the globular cluster NGC 6397. This star's spectrum is highlighted with the red box. Notice that wavelength is tracked on the X axis and intensity is tracked on the Y axis. For this activity, we will be paying attention to the wavelengths that have the highest intensity. As you progress throughout the steps of this activity, you will be filling in this table:
Wavelength Suspected Element Frequency Energy
1.
2.
3.
Step 1: Study the Spectrum
Familiarize yourself with the spectral signature of this star, which shows which wavelengths are absorbed at which intensities. After studying the spectrum, notice which wavelengths ranges have the highest intensity (in other words, notice where the black line under WF4-358 reaches a high point and note which wavelengths ranges that point is associated with). Write down three wavelengths that have the highest intensity in WF4-358. Not that because of the scale of this particular graph, you likely won't be able to tell an exact wavelength. Instead, make the best guess that you can with the information you have. Fill in the first column (Wavelengths) of the table with your answer.
Step 2: Determine Elements
After documenting three wavelengths, refer to the diagram below to investigate which elements may be associated with those wavelengths.
For each of the three peaks in the spectrum you noted, make a guess about which element that peak represents. You will take the wavelength you noted in Step 1, and finding that wavelength on the diagram. For example, if you thought that a wavelength of 475 nm was a peak, you would find that wavelength on the chart and note that Argon might be the element represented by that peak. Repeat for all three peaks. Fill the second column (Suspected Element) of the table with your answers.
Step 3: Find Frequencies
Do some online research to find the frequencies of the three wavelengths you identified. Fill in the third column (Frequency) of the table with your answers.
Step 4: Calculate Energy
Use Planck's Equation to calculate the energy of a photon of light at each of the wavelengths you identified. Planck's Equation goes as follows:
E = hv
In this equation:
E = energy, and is unknown. This is what we are solving for.
h = Planck's constant (6.626 x 10^-34 joule-seconds)
v = frequency
Fill in the last column (Energy) of the table with your answers.
Step 5: Reflection Questions)
Would you expect the spectrum of a blackbody radiator to have peaks and valleys like the spectrum of WF4-358? Why or why not? Define blackbody radiators in your answer.
Pick one element from the chart you made. How might you expect its wavelength to change if it goes from traveling through Earth's atmosphere to traveling through water in the ocean?
Submit the following in one word processing document:
The table you completed in Steps 1-4
The answers to the reflection questions from Step 5
Answers
The highest points of intensity for WF4-358 include 390nm, 402nm, and 420nm (all estimated by x-axis locations in 10 nm increments).
What is wavelength?Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire. In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.
These are the closest approximate wavelengths along the x-axis that correspond to the highest intensities along the y-axis for WF4-358.
The highest points of intensity for WF4-358 include 390nm, 402nm, and 420nm (all estimated by x-axis locations in 10 nm increments).
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Related Questions
Answer and I will give brainiest!!!! How much force is needed to accelerate an object of mass 90 kg at a rate of 1.2 m/s2? 0.013 N 75 N 108 N 1080 N
Answers
Answer: the answer is 108 N
Just took the test and got 108 N correct
a rubber (bulk modulus =1.60 gpa) sphere of radius 46.2 cm is dropped to the bottom of a 2.00 m deep freshwater lake. by how much will the volume of the sphere change? (hint: pay attention to units)
Answers
The volume of the sphere decreases by about 2.689 cubic millimeters.
How does bulk modulus affect sphere volume?The change in volume of the rubber sphere, considering the Bulk modulus of rubber, when dropped to the bottom of a freshwater lake can be calculated by considering the change in pressure.
First, we need to find the change in pressure that the sphere experiences at the bottom of the lake. Using the formula for pressure at a depth in a fluid, we have:
P = rho * g * h
where P is pressure, rho is the density of the fluid, g is acceleration due to gravity, and h is the depth of the fluid.
Substituting the given values, we get:
P = (1000 kg/m³) * (9.81 m/s²) * (2.00 m) = 19620 Pa
Next, we can use the bulk modulus equation to find the change in volume:
Delta V / V = -P / B
where Delta V is the change in volume, V is the initial volume, P is the pressure change, and B is the bulk modulus.
Substituting the given values, we get:
Delta V / V = -19620 Pa / (1.60 * 10⁹ Pa) = -0.0000122625
Multiplying by the initial volume of the sphere, we get:
Delta V = -0.0000122625 * (4/3) * pi * (0.462 m)³ = -2.689 * 10⁻⁶ m³
So the volume of the sphere decreases by about 2.689 cubic millimeters when it is dropped to the bottom of the lake.
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im not sure what to write in the blanks.
Answers
Explanation:
meters per second
meters per second
seconds
Workers who use compressed air for cleaning should limit pressure to _____ PSI.
a. 30
b. 45
c. 60
d. 85
Answers
Option A i.e. 30PSI should be the limit of pressure for workers who use compressed air for cleaning.
Workers who use compressed air for cleaning should limit pressure to 30 PSI. This is to prevent injury and damage to equipment. Higher pressures can cause serious harm to the eyes, ears, and skin, as well as dislodge particles that can become projectiles. It's important to follow proper safety guidelines when using compressed air for cleaning. High-pressure compressed air can cause serious injuries, including skin and eye damage, hearing loss, and even death.
The pressure at which the air is discharged is a critical factor in determining the risk level. The Occupational Safety and Health Administration (OSHA) recommends that workers limit the pressure of compressed air for cleaning to no more than 30 psi (pounds per square inch). This is because compressed air at a pressure of 30 psi or more can penetrate the skin and enter the bloodstream, causing serious harm, including death.
So, the correct answer is option A i.e. 30PSI should be the limit of pressure for workers who use compressed air for cleaning.
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Sound waves travel faster in liquids than in gases. Underwater, a 60 Hz sonar signal travels 9.6 in 400 .
Calculate the wavelength of the signal.
Answers
Answer:
Explanation:
Wavelength (λ) = Speed of Sound (v) / Frequency (f)
λ = 9.6 in/400 Hz = 0.024 in
Therefore, the wavelength of the 60 Hz sonar signal travelling underwater is 0.024 in.
QUICK WILL MARK BRAINLIEST
As light shines from air to water, the index of refraction is 1.02 and the angle of
incidence is 38.0 °. What is the light's angle of refraction?
29.8°
32.5°
37.1°
39.8°
Answers
Answer:
37.1°
Explanation:
draw a figure of a simple pendulum explain its amplitude and effective length ?
Answers
Answer:
Explanation:
A simple pendulum consists of a mass (usually represented as a small object or bob) attached to a string or rod of negligible mass. The mass is free to swing back and forth under the influence of gravity.
In the figure, the point of suspension is denoted by "O," and the mass (bob) is represented by the small circle. The string or rod is represented by the vertical line connecting the point of suspension to the bob.
Amplitude:
The amplitude of a pendulum refers to the maximum displacement or swing of the bob from its equilibrium position. In the figure, the amplitude can be represented by the angle formed between the vertical position and the position of the bob when it swings to its maximum distance on one side. It is usually denoted by the symbol "A."
Effective Length:
The effective length of a pendulum refers to the distance from the point of suspension to the center of mass of the bob. It represents the distance over which the mass swings back and forth. In the figure, the effective length can be measured as the length of the string or rod from the point of suspension to the center of the bob. It is usually denoted by the symbol "L."
It is important to note that the amplitude and effective length of a simple pendulum affect its period of oscillation (the time taken for one complete swing). The relationship between these parameters and the period can be described by mathematical formulas.
Overall, the simple pendulum is a fundamental concept in physics and provides a simplified model for understanding oscillatory motion and the principles of periodic motion.
This passage describes a chemical reaction. Read the passage. Then, answer the question below.
Many chemical factories use the Haber process to make ammonia (NH3). In this process, nitrogen gas (N2) and hydrogen gas (H2) combine at high temperatures and pressures. Ammonia from the Haber process can be used as fertilizer for plants. Fertilizers are made of compounds containing chemical elements such as nitrogen that help plants grow.
In the chemical reaction described in the passage, which of the following are products? Select all that apply.
Hydrogen (H2)
Ammonia (NH3)
Nitrogen (N2)
Answers
In the chemical reaction described in the passage, the product is Ammonia (NH₃)
What is chemical reaction?A chemical reaction is a procedure that causes one group of chemical components to change chemically into another.
Chemical reactions, which can frequently be described by a chemical equation, traditionally include changes that only affect the locations of electrons in the formation and dissolution of chemical bonds between atoms, with no change to the nuclei (no change to the elements present).
The given chemical reaction of chemical factories is:
H₂ + N₂ → NH₃
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A man who has type B blood (genotype: BB) is married to a woman with type O blood. What blood type will their children have? blood typing
Answers
Does natural selection produce a change in individuals or populations?
Answers
Explanation:
Natural selection is the process through which populations of living organisms adapt and change. Individuals in a population are naturally variable, meaning that they are all different in some ways. This variation means that some individuals have traits better suited to the environment than others
(I NEED THIS ANSWERED NOW PLEASE)
Zeros that follow non-zero numbers and are also to the right of a decimal point are ________ significant.
fill in the blank please.
Answers
Answer:
Zeros that follow non-zero numbers and are also to the right of a decimal point are significant.
Explanation:
For example:
0.300 has 3 significant figures.
5.400 has 4 significant figures.
A.)
For the simply supported beam subjected to the loading shown,
derive equations for the shear force V and the bending moment M for
any location in the beam. (Place the origin at point A.) Let a=7.5
Answers
A simply supported beam is subjected to the loading shown as follows:For this beam, the origin is placed at point A, and a = 7.5.To derive equations for the shear force V and the bending moment M for any location in the beam, one has to first calculate reactions at A and B due to loading.Let R_A and R_B be the reaction forces at points A and B, respectively.The reactions will be calculated using the equation below:ΣM_A = 0∑M_A = 0 = R_B × 10 - 1000 × 15R_B = 1500/10R_B = 150 kNandΣF_Y = 0∑F_Y = 0 = R_A + R_BR_A = 1000R_A = 1000 kN.
Therefore, the reaction forces are R_A = 1000 kN and R_B = 150 kN. Using these reactions, we can compute V and M for any point in the beam.To calculate V, we have to draw the free-body diagram of the beam and locate the point of interest. Shear force can then be calculated by adding the forces to one side of the point and subtracting the forces on the other side.
The equation for the shear force V is as follows:For 0 ≤ x ≤ 7.5V(x) = -1000 kNFor 7.5 ≤ x ≤ 15V(x) = -1000 kN + R_A = 1000 - 1000 = 0For x > 15V(x) = -1000 kN + R_A - R_B = 1000 - 1000 + 150 = -850 kNTo calculate M, one must take the moment of the forces about the point. The bending moment M at any point in the beam can then be computed using the following equation:For 0 ≤ x ≤ 7.5M(x) = -1000xFor 7.5 ≤ x ≤ 15M(x) = -1000(15 - x)For x > 15M(x) = -1000(15 - x) - 150(x - 15)
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Eric wants to perform an investigation on red blood cells.......
Answers
Answer: What are the choices
Explanation:?
Gas molecules rotate or vibrate because the binding force between the gas molecules is _____.
Answers
Given:
The gas molecules rotate or vibrate
To find:
The reason
Explanation:
The vibration and the rotation of the molecules depend on the binding force between molecules. The gas molecules can rotate and vibrate more compared to the solids and the liquids because of the binding force between the molecules is weak.
Hence, gas molecules rotate or vibrate because the binding force between the gas molecules is weak.
A wave that consists of a combination of electrical and magnetic energy is a(n):
a. magnoelectric wave
c. magnetolectric wave
b. electromagnetic wave
d. electrical-magnetic wave
Answers
This wave is produced as a result of the vibration of the electric and magnetic fields.
A student is creating an electromagnet for an investigation. Which feature of the electromagnet will least influence the magnetic force? answer choices
the material of the core
the number of wire coils
the size of the power source
the brand of the battery
Answers
A student is creating an electromagnet for an investigation, and the one feature of the electromagnet that will have the least influence on the magnetic force is the brand of the battery, which is the last option.
What is electromagnet ?The magnetic force of an electromagnet is determined by a number of factors, such as the material of the core and the number of wire coils, and the size of the power source but the brand of the battery don't have an effect on the magnetic force of the electromagnet as long as the battery provides the necessary voltage and current to power the electromagnet.
Hence, the one feature of the electromagnet that will have the least influence on the magnetic force is the brand of the battery, which is the last option.
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Which benefits do mangrove trees provide to surrounding coastal wetlands? Select two options. They hold soil in place. They store floodwaters. They maintain surface water flow. They absorb the energy of waves. They filter water and improve water quality.
Answers
Mangrove trees provide a variety of benefits to surrounding coastal wetlands, including holding soil in place and storing floodwaters.
Their extensive root systems act as a barrier against erosion caused by waves and storms, keeping soil in place and preventing sediment from washing away. Additionally, the dense vegetation of mangroves can store and slow down floodwaters, reducing the impact of high tides and storm surges. This can prevent damage to nearby communities and protect other important wetland ecosystems.
Furthermore, mangrove trees also absorb the energy of waves, reducing the amount of erosion and damage to nearby shores. They also filter water and improve water quality by removing pollutants and excess nutrients from the surrounding environment, providing a healthier habitat for both wildlife and humans alike.
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28. Samuel applies a horizontal force of 35.0 N to a sleigh over a distance of 1.50 m
along a level surface. Calculate the work done on the sleigh by Samuel. Show your
work.
Answers
Answer:
Explanation:
The formula you use is
W = F * d
F = 35.0 N
d = 1.5 m
W = 35 N * 1.5 m
W = 52.5 J (oules)
according to the big bang theory the entire universe began as a
Answers
According to the Big Bang theory, the entire universe began as a singularity - an extremely hot and dense point in space-time. About 13.8 billion years ago, this singularity began to rapidly expand, creating all matter and energy in the universe and eventually leading to the formation of galaxies, stars, and planets.
The Big Bang theory posits that the universe began as a singularity, a point of infinite density and temperature. This singularity rapidly expanded, causing a rapid cooling and the formation of particles like protons, neutrons, and electrons. As the universe continued to expand and cool, these particles began to form atoms, eventually leading to the formation of stars and galaxies. The Big Bang theory has been supported by a range of scientific observations and experiments, from the cosmic microwave background radiation to the relative abundance of light elements. Despite ongoing debate and refinement, it remains the prevailing scientific explanation for the origin and evolution of the universe.
In conclusion, the Big Bang theory suggests that the universe began as a singularity that rapidly expanded and eventually led to the formation of all matter and energy. This theory has been supported by a wealth of scientific evidence and remains the prevailing explanation for the origins and evolution of the universe.
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mention seven derived quantities and show how their respective units are obtain or form
Answers
moment of force newton meter N·m
surface tension newton per meter N/m
angular velocity radian per second rad/s
angular acceleration radian per second squared rad/s2
heat flux density, irradiance watt per square meter W/m2
heat capacity, entropy joule per kelvin J/K
a 5-kg shark swimming at 1 m/s swallows an absent-minded 1-kg fish swimming toward it at 4 m/s. the speed of the shark after his meal is
Answers
The speed of the shark after it swallows the fish is calculated using the conservation of momentum principle. The total momentum before the collision is 5 kg * 1 m/s + 1 kg * 4 m/s = 9 kg * m/s. The total momentum after the collision is 5 kg * v, where v is the speed of the shark after the collision. Therefore, v = 9/5 m/s = 1.8 m/s. Thus, the speed of the shark after it swallows the fish is 1.8 m/s.
The speed of the shark after it has swallowed the 1-kg fish swimming toward it at 4 m/s is 3 m/s. This can be determined by conservation of momentum. Momentum is a vector quantity, meaning that the direction of the momentum must also be taken into account.
In this situation, the momentum of the shark before it swallows the fish is 5 kg⋅m/s due to its velocity of 1 m/s. After the shark has eaten the fish, the momentum is 6 kg⋅m/s due to the addition of the fish's momentum of 4 kg⋅m/s. Since momentum is conserved, the momentum of the shark after eating the fish is the same as the momentum of the shark before eating the fish. Since the mass of the shark does not change, the velocity must change to balance out the difference in momentum. This means that the velocity of the shark after eating the fish is 3 m/s.
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Why is physics considered to be the basic science?.
Answers
The basic sciences are defined as the scientific disciplines of mathematics, physics, chemistry, and biology. They are called basic sciences because they provide a fundamental understanding of natural phenomena and the processes by which natural resources are transformed.
Calculate the weight of the body of mass 500 g. (Take g =10 m / s 2)
Answers
W=mg ———-> 10x0.5=5 N
Which will be attracted to (or repelled by) a magnet?
Check all that apply.
A. An electromagnet
B. An iron pipe
C. A copper wire not carrying current
D. A negatively charged piece of silver
E. An aluminum wire carrying current
Answers
Things which will be attracted to (or repelled by) a magnet are
An iron pipe
A negatively charged piece of silver
An aluminum wire carrying current
What is a repelling and attracting ?According to the "rule of attraction of magnets," magnets will attract one another when their south poles are brought near together. According to the "rule of magnet repulsion," magnets repel one another when their respective north poles are brought close to one another.
Electrostatic forces are responsible for the attraction and repulsion between charged objects. When two bodies are not in contact, electrostatic force can still be present.Learn more about Magnet here:
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Answer:
the answer should be: An Electromagnet, An Iron Pipe, and An Aluminum Wire Carrying Current
Explanation:
took the test
When you drop a 0.43 kg apple, Earth ex erts a force on it that accelerates it at 9.8m / (s ^ 2) toward the earth's surface. According to New ton's third law, the apple must exert an equal but opposite force on Earth. If the mass of the earth 5.98 * 10 ^ 24 * kg what is the magnitude of the earth's acceleration toward the apple?
Answer in units of m / (s ^ 2)
Answers
Answer:
The answer to the question is highlighted in the box
5. Ocean temperatures are increasing under climate change. What effect do you think this might have on the biological pump?
Answers
If ocean temperatures are increasing under climate change, then it might alter the carbon cycle and therefore it may have negative outcomes on the biological pump.
What does the biological pump mean?The term biological pump makes reference to the mechanism by which inorganic carbon atoms can be fixed into organisms due to photosynthetic processes, which is key to maintaining the homeostasis of the biosphere.
Therefore, with this data, we can see that the increase in ocean temperature may impact on the state of equilibrium of the biosphere by altering the carbon cycle and consequently affecting the biological pump.
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Advanced Wireless Services (AWS) is a wireless telecommunications spectrum band used for mobile voice and data services, video, and messaging. The AWS band uses frequencies in several segments: from 1695 to 2200 MHz. a) Determine the corresponding range of wavelengths used by the AWS mobile devices. b) To what region/band of electromagnetic spectrum does the range belong
Answers
Given data
*The given frequency is
\(f_1_{}=1695\text{ MHz}=1695\times10^6\text{ Hz}\)*The another given frequency is
\(f_2=2200\text{ MHz=}2200\times10^6\text{ Hz}\)*The given speed of light is c = 3.0 × 10^8 m/s
(a)
The formula for the wavelength is given as
\(\lambda_1=\frac{c}{f_1}\)Substitute the known values in the above expression as
\(\begin{gathered} \lambda_1=\frac{(3\times10^8)}{(1695\times10^6)^{}} \\ =0.176\text{ m} \end{gathered}\)The another wavelength for the another frequency is calculated as
\(\begin{gathered} \lambda_2=\frac{c}{f_2} \\ =\frac{(3.0\times10^8)}{(2200\times10^6)} \\ =0.136\text{ m} \end{gathered}\)(b)
Radio spectrum is an electromagnetic spectrum where the frequency range belongs of wireless telecommunication.
The following statements that correctly describe the modulus of elasticity, E:
Answers
The modulus of elasticity, E, is a measure of a material's stiffness and ability to resist deformation when a force is applied. It is defined as the ratio of stress to strain within the elastic range of the material. In other words, it describes how much a material will stretch or compress under a given force.
The modulus of elasticity is important because it allows engineers to predict how materials will behave under different conditions, such as temperature changes, loading conditions, and other factors. It also helps to determine the maximum load a material can withstand before it starts to deform or break.
In detail, the modulus of elasticity is a fundamental property of a material that describes its ability to resist deformation when subjected to external forces. It is calculated by measuring the stress and strain of the material and using the equation E = σ/ε, where σ is stress and ε is strain.
The modulus of elasticity is important in many areas of engineering, such as structural design, materials science, and mechanics. It helps to ensure that structures and materials are designed and tested to withstand the loads and stresses they will be subjected to, and it provides a basis for comparing different materials and choosing the best one for a particular application.
In summary, the modulus of elasticity, E, is a material property that describes its stiffness and resistance to deformation. It is correctly determined using Hooke's Law and is crucial for predicting the mechanical behavior of materials when subjected to stress.
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If an area has high air pressure and low humidity, what type of weather will it most likely have?
Answers
Answer:
c
Explanation:
a beam of yellow light has a wavelength of 600 nm and a frequency of 500 thz. what is the speed of light?
Answers
The speed of light is 3 × 10⁸ m/s, if the wavelength is 600 nm and the frequency of the yellow light is 500 thz.
Wavelength of the yellow light, λ = 600 nm = 6 × 10⁻⁷ m.
Let the speed of yellow light, = v
The frequency of the yellow light, = 500 thz = 5 × 10¹⁴ hz
We know the relationship between speed of the wave, wavelength and the frequency of the wave is as follows:
speed = wavelength × frequency
v = 6 × 10⁻⁷ × 5 × 10¹⁴
n = 3 × 10⁸ m/s
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