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The peak intensity of radiation from Star Beta is 350 nm. In what spectral band is this? UV, radio waves, visible light, or infared radiation

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Answer:

UV (Ultraviolet Waves)

Explanation:

As we know that wavelength range of visible light is given as 450 nm to 750 nm.

so here as we move towards higher wavelength range then the energy of electromagnetic waves will decrease as we know it is given as

E = frac{hc}{lambda}

now on increasing wavelength we will shifted to infrared waves while on decreasing the wavelength energy of electromagnetic waves will increase and this will shift towards ultraviolet waves

Since the given wavelength is less than the wavelength of visible light so here it is Ultraviolet Waves

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[99 Points!!] Can someone help me with the following questions? (02.06 MC)Doug wants to get better at volleyball. In order to do this, he has created a list of skills he will need to improve. Which skill should get the most of his attention in order for him to excel at volleyball? Coordination Speed Power Balance (02.07 HC)Which of the following foods is rich in nutrients that will help hair, skin, and nails to grow? Lettuce Yogurt Carrots Apples (01.06 MC)The chart below shows four friends’ target heart rate zones. During their last spin class, each person averaged 170 beats per minute. Based on this information, who worked at the highest intensity level? Name Target Heart Rate Zone Janna 146bpm—188bpm Shania 145bpm—188bpm Paige 140bpm—182bpm Mimi 140bpm—185bpm A.Janna B Shania C Paige DMimi (02.06 MC)Emma has evaluated her skills and determined that she has many strengths, but power is her least-developed skill. She is signing up for a sport, but she wants to avoid anything that plays to her weakness. Which two sports should she avoid? Gymnastics and soccer Archery and bicycling Swimming and baseball Tennis and volleyball

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Gymnastics and soccer since those sports are very active and involve a lot of physical cardio, soccer involves a lot of running.

Swimming and baseball are also some hard sports especially swimming since most are your muscles are used during that activity.

Hope this helps 😉

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Explain why intensity level is an important factor in your workouts.

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Answered by answersmine AT 22/10/2019 – 03:52 AM

Raising the intensity is raising your heart rate. If your workout is high intensity, you burn more fat! It is very important. If you are working out with no intensity, means you are not sweating.

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The rate (in mg carbon/m3/h) at which photosynthesis takes place for a species of phytoplankton is modeled by the function p = 120i i2 + i + 9 where i is the light intensity (measured in thousands of foot-candles). for what light intensity is p a maximum?

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The given function is:

P = 120 i / (i^2 + i + 9)

or

P = 120 i (i^2 + i + 9)^-1

The maxima point is obtained by taking the 1st
derivative of the function then equating dP / di = 0:

dP / di = 120 (i^2
+ i + 9)^-1 + (-1) 120 i (i^2 + i + 9)^-2 (2i + 1)

setting dP / di =0 and multiplying whole equation by (i^2
+ i + 9)^2:

0 = 120 (i^2 + i + 9) – 120i (2i + 1)

Dividing further by 120 will yield:

i^2 + i + 9 – 2i^2 – i = 0

-i^2 + 9 =0

i^2 = 9

i = 3      (ANSWER)

Therefore P is a maximum when i = 3

Checking:

P = 120 * 3 / (3^2 + 3 + 9)

P = 17.14

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You are standing 10 meters from a light source. then, you back away from the light source until you are 20 meters away from it. from your perspective, what has happened to the intensity of the wave?

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You are standing 10 meters from a light source. then, you back away from the light source until you are 20 meters away from it. from your perspective, what has happened to the intensity of the wave?

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In order to distinguish between wavelengths independent of light intensity, one must have at least _____visual pigment(s).? a. ?three b. ?two c. ?four d. one?

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The frequency of light that has a wavelength of 249 nm is about 1.20 × 10¹⁵ sec⁻¹

Further explanation

The term of package of electromagnetic wave radiation energy was first introduced by Max Planck. He termed it with photons with the magnitude is :

large {boxed {E = h times f}}

E = Energi of A Photon ( Joule )

h = Planck’s Constant ( 6.63 × 10⁻³⁴ Js )

f = Frequency of Eletromagnetic Wave ( Hz )

The photoelectric effect is an effect in which electrons are released from the metal surface when illuminated by electromagnetic waves with large enough of radiation energy.

large {boxed {E = frac{1}{2}mv^2 + Phi}}

large {boxed {E = qV + Phi}}

E = Energi of A Photon ( Joule )

m = Mass of an Electron ( kg )

v = Electron Release Speed ( m/s )

Ф = Work Function of Metal ( Joule )

q = Charge of an Electron ( Coulomb )

V = Stopping Potential ( Volt )

Let us now tackle the problem !

Given:

λ = 249 nm = 2,49 × 10⁻⁷ m

Unknown:

f = ?

Solution:

f = frac{v}{lambda}

f = frac{3 times 10^8}{2.49 times 10^{-7}}

f approx 1.20 times 10^{15} ~ sec^{-1}

Learn more

Answer details

Grade: College

Subject: Physics

Chapter: Quantum Physics

Keywords: Quantum , Physics , Photoelectric , Effect , Threshold , Wavelength , Stopping , Potential , Copper , Surface , Ultraviolet , Light

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Duration, tempo, intensity, scope, setting, and chronology are:

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Duration, tempo, intensity, scope, setting, and chronology are:

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A sound wave with a power of 8.8 ×10^-4 W leaves a speaker and passes through section A, which has an area of 5.0 m^2 what is the intensity of sound in this area? 1.8×10^-4, 1.8×10^-6, 1.6×10^-4 1.6×10^-6

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Development of new areas in science and technology affects theories in a way that the theory, because of new information can change. Almost all theories change over time because of new evidence and new information. Sometimes they even become obsolete because a new theory is formed that is better than the old theory.

For example, Newtons theory of gravity is still good enough for some area of physical research, when we talk about macroscopic bodies that don’t have a very high velocity. But Newtons theory has been expanded by Einstein’s theory of relativity and quantum mechanics because those theories explain in a much more precise way how particles like photons act when they have very high velocities and how very small particles, like electrons act. 

All of the other options here are false. Theories can’t, by definition become laws. Theories can’t, by definition, become facts. And finally, theories, by definition, can’t become hypotheses. 

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Which sentences in this excerpt from F. Scott Fitzgerald’s “Winter Dreams” show that Dexter’s interest in Judy Jones has more to do with her beauty than her personality? It began like that—and continued, with varying shades of intensity, on such a note right up to the denouement. Dexter surrendered a part of himself to the most direct and unprincipled personality with which he had ever come in contact. Whatever Judy wanted, she went after with the full pressure of her charm. There was no divergence of method, no jockeying for position or premeditation of effects—there was a very little ment

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Posted in English

The correct answer should be Dexter
surrendered a part of himself to the most direct and unprincipled
personality with which he had ever come in contact.

That is

the correct answer because her personality is not really one that is appealing to people since she’s unprincipled and direct, which shows that he was into her because of her charms.


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When using the note-card system, what goes in the upper right-hand corner of the card?

The upper right-hand corner of the note-card contains the source information.

Usually the name of the author and/or the page number where the information on the card was found goes in the upper right-hand corner of the note-card. Maybe if you’re also using source cards, the upper right-hand corner will contain a source number, thus you can reference your source card for the necessary information. The top of the note-card should contain the title with the topic the information will deal with or support. 

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1. Read the excerpt from Fast Food Nation. Instead of relying upon a small, stable, well-paid, and well-trained workforce, the fast food industry seeks out part-time, unskilled workers who are willing to accept low pay. Teenagers have been the perfect candidates for these jobs, not only because they are less expensive to hire than adults, but also because their youthful inexperience makes them easier to control. Which of the following choices best presents a counterclaim to the argument presented in this excerpt? A. Teenagers have not yet developed skills that make them valuable employees in the workforce. B. Fast food restaurants are able to employ people who otherwise might not be able to find a job because of the low skill level required to perform the tasks. C. The McDonald brothers designed the Speedee Service System based on the assembly line systems of American factories in the early twentieth century. D. By law, fast food restaurants must offer equal employment opportunities to those seeking work. 2. Read the paragraph. Teaching the rambunctious group of canines at the obedience school was a great deal of work, but each instructor took a respite once the dogs were placed in their individual kennels. Which word is closest in meaning to the underlined word? A. vacation B. beverage C. payment D. break 3. Read the excerpt from Neil deGrasse Tyson’s “Death by Black Hole.” If you stumbled upon a black hole and found yourself falling feet-first toward its center, then as you got closer, the black hole’s force of gravity would grow astronomically. Curiously, you would not feel this force at all because, like anything in free fall, you are weightless. What you do feel, however, is something far more sinister. While you fall, the black hole’s force of gravity at your two feet, they being closer to the black hole’s center, accelerates them faster than does the weaker force of gravity at your head. The difference between the two is known officially as the tidal force, which grows precipitously as you draw nearer to the black hole’s center. For Earth, and for most cosmic places, the tidal force across the length of your body is minuscule and goes unnoticed. But in your feet-first fall toward a black hole the tidal forces are all you notice. Which sentence from the excerpt best supports the idea that falling into a black hole would be excruciatingly painful? A. Curiously, you would not feel this force at all because, like anything in free fall, you are weightless. B. What you do feel, however, is something far more sinister. C. For Earth, and for most cosmic places, the tidal force across the length of your body is minuscule and goes unnoticed. D.But in your feet-first fall toward a black hole the tidal forces are all you notice. 4. Read the excerpt from Rudolfo Anaya’s essay “Take the Tortillas Out of Your Poetry.” Tortillas and poetry. They go hand in hand. Books nourish the spirit, bread nourishes our bodies. Our distinct cultures nourish each one of us, and as we know more and more about the art and literature of the different cultures, we become freer and freer. . . . I don’t know anyone who doesn’t like to sample different ethnic foods, the breads of many many groups; just as many of us enjoy sampling books from different areas of the world. I travel to foreign countries, and I know more about myself as I learn more about my fellow human beings. Censorship imposes itself in my path of knowledge, and that activity can be justified by no one. Which phrase from the excerpt best helps the reader identify the author’s purpose? A. “I know more about myself as I learn more about my fellow human beings” B. “I don’t know anyone who doesn’t like to sample different ethnic foods” C. “many of us enjoy sampling books from different areas of the world” D. “we know more and more about the art and literature of the different cultures”

1. The correct answer is D. Although the excerpt uses teenagers as an example, the central claim is that fast food companies hire unskilled workers. Thus, it’s most effective to produce a counterclaim that actually debunks the initial argument. Since the fast food industry offers equal employment opportunities, it legally cannot seek only unskilled workers. 2. The correct answer is D. If you don’t know that “respite” means “break,” you can determine its meaning from context clues. The sentence begins by saying that teaching the dogs is a lot of hard work, so we can infer that the instructors were tired. Then, the sentence says that they took a respite when the dogs were put in their individual kennels, meaning that the instructors were no longer training the dogs. Thus, we can deduce that the trainers were on break, or taking a respite. 3. The correct answer is B. The word “sinister” is the key word that tells us falling into a black hole would be exruciatingly painful. “Sinister” is a feeling that something harmful or evil is happening. Thus, the use of sinister tells us that black holes would be horribly painful. 4. The correct answer is D. Throughout the poem, the poetic voice is comparing bread and books, specifically of other cultures. He’s trying to show us that by eating different cultural foods and reading literature from different cultures, we learn more about ourselves and the world around us.

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Please give me examples of topic sentences with controlling ideas for a topic about my favorite movie

Whatever you want to talk about in your paragraph, your topic sentence will be a sort of summary or preview that will be supported by all the other sentences in your paragraph, so you have to decide what the paragraph is going to be about before you can write your topic sentences. 

Let’s look at “Movies.” What do you want to say about movies? 
Going to the movies is a fun way to spend a Saturday afternoon? Movie special effects today are far superior to those of films just 10 years ago? Movies are a hugh waste of money? A “controlling” idea is an idea that makes a reader ask a question. Any time a topic sentence has a good “controlling” idea, the reader will have his or her curiosity raised.

 A topic sentence is the first sentence of a paragraph, that tells what the paragraph is going to be about. 

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The degree or intensity with which a particular genotype is expressed in a phenotype is its

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Answer:

a) these traits are carried only on the x chromosome and since there is no matching gene on the y chromosome, the traits are expressed more readily in males.

Explanation:

Hemophilia, color blindness, and duchenne muscular dystrophy are disorders which are caused by X-linked recessive mutations which means that even if a mutation occurs in a gene of only one X chromosome then the phenotype will be expressed in the males because they are hemizygous for the gene. By hemizygous we mean to say that males have one X and one Y chromosome so a gene present on X chromosome will not find match on the Y chromosome and the mutation will express readily.

In contrast to this, in case of females who have two X chromosomes, the mutation in one X chromosome may be suppressed by another X chromosome in heterozygous condition i.e. if another X chromosome has healthy gene (wild type gene). In case of females the diseased phenotype will only appear if they are homozygous for the mutation.

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Two waves, each with intensity 40 db, interfere constructively. what is the intensity of the combined waves, in db?

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We are given an equation which describes a wave on a string:

D(x,t) = 3.6cm * sin[2π (x/4.8m) + t/(0.14s) + 1)] 

where x is in meters
t is in seconds

at t = 0.42 seconds, and x = 5.2 m

First, convert the term into the equation with cm units:

D(x,t) = 3.6cm/100cm/m * sin[2π (x/4.8m) + t/(0.14s) + 1)] 

then, substitute the values of x and t

D(x,t) = 3.6cm/100cm/m * sin[2π (5.2/4.8m) + 0.42/(0.14s) + 1)] 

Solve for D, this is your displacement at x = 5.2 and at 0.42 seconds

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