What does the doppler effect tell astronomers about the universe

Answers

Answer 1

Answer: The doppler effect has red and blue shifts. A red shift means something is moving farther away, and a blue shift means it is moving closer. The universe has a red shift, and since a red shift means that it is moving farther away, this tells astronomers that the universe is still expanding.

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The inner solar system contains theA)Jovian planetsB)terrestrial planets and asteroidsC)dwarf planets like Pluto
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For the above circuit, use superposition to determine the voltage across the R3 resistor due only to the I1 current source. Use the following values for your calculations: I1 = 5 A V1= 16 V R1=3 Ohms, R2=12 Ohms, R3=3 Ohms. Find V.

Answers

Answer:

idk

Explanation:

idk

What characteristics of EM waves did you discover?

Answers

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 $\boxed{ \ c = 3 * 10^8 \ m/s. \ }$
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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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

If people from Georgia have just experienced an extremely cold winter the last couple of months, what would the climate most likely be classified as? Polar
Temperate
Maritime
Tropical

Answers

temperate I'm not sure, cuz polar is like freeze, and tropical is hot

Answer:

polar

Explanation:

they said it was extreme so atleast it would be polar

suppose that you look into a photometer's eyepiece and the fluorescent disks appear to be equal in intensity. If the distance between the photometer to lamp 1 is 400mm, the distance between the photometer to lamp 2 is 200 mm, and the intensity of lamp 2 is known to be 15 candelas, what is the intensity to lamp 1?

Answers

Use the Inverse square law, Intensity (I) of a light is inversely proportional to the square of the distance(d).

I=1/(d*d)

Let Intensity for lamp 1 is L1 distance be D1 so on, L2 D2 for Intensity for lamp 2 and its distance.

L1/L2=(D2*D2)/(D1*D1)

L1/15=(200*200)/(400*400)
L1=15*0.25
L1=3.75 candela

400J of heat is produced in 4 sec in 4ohm resistor.calculate yhe PD across the resistor.

Answers

Actually, after the information you gave, I expected you to ask for the voltage
across the resistor, so I'm not quite sure what you mean by 'PD'. It could be the
"Potential Difference" or the "Power Dissipation" across the resistor.
Here are both answers:

Power Dissipation:
Power = Energy/time = 400 joules / 4 seconds = 100 joules/second = 100 watts.

Potential Difference (voltage):
Power dissipated by a resistor = (voltage)² / Resistance

100 watts = (voltage)² / 4 ohms

Multiply each side by 4 ohms:

400 watts-ohms = (voltage)²

Voltage = square root of 400 watts-ohms = 20 volts

A poet endowing animals, objects, or abstract ideas with human characteristics is using the figure of speech called _____.

Answers

The most likely answer is personification. However, if said poet addresses such phenomena directly as to another human, or in a manner of dialogue, they use a type of personification known as anthropomorphism.

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