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Ray Of Light [21]
2 years ago
10

Which element is the main component of steel and the most widely used of all metals

Physics
2 answers:
Blizzard [7]2 years ago
8 0

Answer:

iron

Explanation:

Dafna1 [17]2 years ago
6 0
Iron

IRON is the main ingredient in various forms of iron and steel, but the various types of metals contain other elements as well.


BRAINLIEST??? HOPE IT HELPS!!!
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what is the frequency of the photon emitted by a hydrogen atom when its electron drops from the n = 6 to n = 4 energy level?
Gemiola [76]

The frequency of the photon emitted by a hydrogen atom is   26.2*10^-^4 hz

<h3>What are Photons?</h3>

A particle representing a quantum of light or other electromagnetic radiation. A photon carries energy proportional to the radiation frequency but has zero rest mass.

In the case of light, the frequency, symbolized by the Greek letter nu (ν), of any wave equals the speed of light, c, divided by the wavelength λ:

v = c/λ

Since the wavelength λ is in the bottom of the fraction, the frequency is inversely proportional to the wavelength.

v = c/λ

v= \frac{3*10^8}{434*10^-^9} = 6.91*10^1^4 Hz

By using Rydberg's formula,

1/λ = Rz^2(\frac{1}{n_1^2}  - \frac{1}{n_2^2})

1/λ = 109677 *(\frac{1}{4^2} - \frac{1}{6^2}) = 3808.22 cm^-^1

λ  = 26.2*10^-^4 hz

26.2*10^-^4 hz is  frequency of the photon emitted by a hydrogen atom.

Learn more about Photons here:brainly.com/question/20912241

#SPJ1

4 0
1 year ago
Use Hooke's Law to determine the work done by the variable force in the spring problem. A force of 450 newtons stretches a sprin
natima [27]

The work done in stretching the spring from 50 cm to 80 cm is 67.5 J.

<h3>Hooke's Law</h3>

Hooke's law states that the force applied to an elastic material is directly proportional to its extension, provided its elastic limit is not exceeded.

To calculate the amount of work done by Hooke's law, first, we need to find the force constant of the spring.

Formula:

  • F = ke................. Equation 1

Where:

  • F = Force applied
  • k = Spring constant
  • e = extension

make k the subject of the equation

  • k = F/e................ Equation 2

From the question,

Given:

  • F = 450 N
  • e = 30 cm = 0.3 m

Substitute these values into equation 2

  • k = 450/0.3
  • k = 1500 N/m.

Finally, To find the work done in stretching the spring from 50 cm to 80 cm, we use the formula below.

  • W = ke²/2........... Equation 3

Where:

  • W = Work done
  • k = spring constant
  • e = extension

Also, From the question,

Given:

  • e = (80-50) = 30 cm = 0.3 m
  • k = 1500 N/m

Substitute these values into equation 3

  • W = 1500(0.3²)/2
  • W = 67.5 J.

Hence, The work done in stretching the spring from 50 cm to 80 cm is 67.5 J.

Learn more about Hooke's law here: brainly.com/question/12253978

5 0
2 years ago
What is a combination of two or more simple machines? a complicated machine, a compound machine ,a compiled machine, a converted
nadya68 [22]
It's a compound machine
3 0
3 years ago
Read 2 more answers
A stationary front occurs when the boundary surface between two air masses does not _____.
likoan [24]
When the two air masses meet i think 
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3 years ago
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Astronomers have no theoretical explanation for the ""hot Jupiters"" observed orbiting some other stars. (T/F)
-BARSIC- [3]

Answer:

Astronomers have no theoretical explanation for the ""hot Jupiters"" observed orbiting some other stars.

False

Explanation:

The “hot Jupiters” joint word startes to be used to be able to describe planets like 51 Pegasi b, a planet with a 10-day-or-less orbit and a mass 25% or greater than Jupitere, circling a sun-like star planet in 1995, which was found by astronomers Michel Mayor and Didier Queloz, who were awarded the 2019 Nobel Prize for Physics along with the cosmologist James Peebles for their “contributions to our understanding of the evolution of the universe and Earth’s place in the cosmos.”

Now  we know a total of 4,000-plus exoplanets, but only a few more than 400 meet the definition of the enigmatic hot Jupiters which, tell us a lot about how planetary systems form, and what kinds of conditions cause extreme results.

In a 2018 paper in the Annual Review of Astronomy and Astrophysics, astronomers Rebekah Dawson of the Pennsylvania State University and John Asher Johnson of Harvard University reviewed on how hot Jupiters might have formed, and would be the meaning for the rest of the planets in the galaxy.

4 0
3 years ago
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