Which statement demonstrates that ultraviolet (UV) rays are electromagnetic waves?

Answer:

The initial velocity of the skater is 13.22 m/s.

Explanation:

Given that,

Acceleration of the skater,

Distance covered, d = 50 m

The skater's final velocity was, v = 20 m/s

We need to find the initial velocity of the skater. It can be calculated using third equation of motion as :

So, the initial velocity of the skater is 13.22 m/s. Hence, this is the required solution.

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Kinematics

https://brainly.in/question/10299229

Answer:

Vi = Vf - (a * t) just plug this in.

Vi stands for “initial velocity”

Vf stands for “final velocity”

a stands for “acceleration”

t stands for “time”

The characteristics of electromagnetic waves typically represent as follows:

• There are changes in the electric and magnetic fields simultaneously so that both fields have maximum and minimum values ​​at the same time and place.
• The direction of the electric field and the magnetic field are perpendicular to each other. The direction of both is perpendicular to the direction of the wave propagation.
• The shape of electromagnetic waves is transverse waves.
• It has general wave characteristics like polarization, reflection, refraction, interference, and diffraction.
• The amount of the electric field (E) is directly proportional to the magnitude of the magnetic field, with the relationship E = cB.
• The universal constant of the velocity of electromagnetic waves in a vacuum is
• The speed at which electromagnetic waves propagate depends merely on the electrical and magnetic properties of the medium that it travels on.
• Because electromagnetic waves do not contain an electric charge, they do not experience any possible deviation in the electric or magnetic fields.

Further explanation

• Two physicists who contributed significantly to developing the concept of electromagnetic waves are Faraday and Maxwell around 1831-1864.
• From the observations, Faraday suggested that changes in the magnetic field cause an electric charge to flow in the loop of wire, contributing in the emergence of an electric field.
• Maxwell proposed a reverse process, which is a change in the electric field will generate a magnetic field.
• As follows, according to Faraday's Law, changes in sinusoidal magnetic fields generate electric fields which also change sinusoidally.
• Meantime, according to Maxwell's Hypothesis, changes in sinusoidal electric fields generate magnetic fields which also change sinusoidally.
• Furthermore, there is a process of combining electric and magnetic fields that propagate in all directions called electromagnetic waves.

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2. Determine the shortest wavelength in electron transition brainly.com/question/4986277
3. Particle's speed and direction of motion brainly.com/question/2814900

Keywords: the characteristics, electromagnetic waves, transverse, vacuum, electric fields, magnetic, perpendicular, propagation, Maxwell, Faraday, the speed, polarization, reflection, refraction, interference, and diffraction

Answer: reflection

Refraction

Energy

Speed

Explanation:

Reflection results when em wave hits a plane surface and returns in the same angle it incident

Refraction is the change in velocity and direction of em wave as it crosses boundaries of different medium

The energy of em wave is evenly distributed in electric field and magnetic field

The speed of em wave is the same as 3×10^8