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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

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

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

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.

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?

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

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?

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?

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 :

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.

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:

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:

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

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

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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Posted in English

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.

Posted in English

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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Posted in English

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

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?

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