67486 + Interview Questions in Secondary School in Physics

1.	Explain the phenomenon under auroras.With images.
Answer» Aurora Aurora, LUMINOUS phenomenon of Earth’s upper atmosphere that occurs primarily in high latitudes of both hemispheres; auroras in the Northern Hemisphere are called aurora borealis, aurora polaris, or northern lights, and in the Southern Hemisphere aurora australis, or southern lights. Auroras are CAUSED by the interaction of energetic particles (electrons and protons) of the solar wind with atoms of the upper atmosphere. Such interaction is confined for the most part to high latitudes in oval-shaped zones that surround Earth’s magnetic poles and maintain a more or less fixed orientation with respect to the Sun. During periods of low solar activity, the auroral zones shift poleward. During periods of intense solar activity, auroras occasionally extend to the middle latitudes; for example, the aurora borealis has been seen as far SOUTH as 40° latitude in the United States. Auroral emissions typically occur at altitudes of about 100 km (60 miles); however, they may occur anywhere between 80 and 250 km (about 50 to 155 miles) above Earth’s surface. Auroras take many forms, including luminous curtains, arcs, bands, and patches. The uniform arc is the most stable form of aurora, sometimes persisting for hours without noticeable variation. However, in a great display, other forms appear, commonly undergoing dramatic variation. The lower edges of the arcs and folds are usually much more sharply DEFINED than the upper parts. Greenish rays may cover most of the sky poleward of the magnetic zenith, ending in an arc that is usually folded and sometimes edged with a lower red border that may ripple like drapery. The display ends with a poleward retreat of the auroral forms, the rays gradually degenerating into diffuse areas of white light. Auroras receive their energy from charged particles traveling between the Sun and Earth along bundled, ropelike magnetic fields. The particles are driven by the solar wind, captured by Earth’s magnetic field, and conducted downward toward the magnetic poles. They collide with oxygen and nitrogen atoms, KNOCKING away electrons to leave ions in excited states. These ions emit radiation at various wavelengths, creating the characteristic colours (red or greenish blue) of the aurora. In addition to Earth, other planets in the solar system that have atmospheres and substantial magnetic fields—i.e., Jupiter, Saturn, Uranus, and Neptune—display auroral activity on a large scale. Auroras also have been observed on Jupiter’s moon Io, where they are produced by the interaction of Io’s atmosphere with Jupiter’s powerful magnetic field. ------Hope This Help :)

1.

Explain the phenomenon under auroras.With images.

Answer»

Aurora

Aurora, LUMINOUS phenomenon of Earth’s upper atmosphere that occurs primarily in high latitudes of both hemispheres; auroras in the Northern Hemisphere are called aurora borealis, aurora polaris, or northern lights, and in the Southern Hemisphere aurora australis, or southern lights.

Auroras are CAUSED by the interaction of energetic particles (electrons and protons) of the solar wind with atoms of the upper atmosphere. Such interaction is confined for the most part to high latitudes in oval-shaped zones that surround Earth’s magnetic poles and maintain a more or less fixed orientation with respect to the Sun. During periods of low solar activity, the auroral zones shift poleward. During periods of intense solar activity, auroras occasionally extend to the middle latitudes; for example, the aurora borealis has been seen as far SOUTH as 40° latitude in the United States. Auroral emissions typically occur at altitudes of about 100 km (60 miles); however, they may occur anywhere between 80 and 250 km (about 50 to 155 miles) above Earth’s surface.

Auroras take many forms, including luminous curtains, arcs, bands, and patches. The uniform arc is the most stable form of aurora, sometimes persisting for hours without noticeable variation. However, in a great display, other forms appear, commonly undergoing dramatic variation. The lower edges of the arcs and folds are usually much more sharply DEFINED than the upper parts. Greenish rays may cover most of the sky poleward of the magnetic zenith, ending in an arc that is usually folded and sometimes edged with a lower red border that may ripple like drapery. The display ends with a poleward retreat of the auroral forms, the rays gradually degenerating into diffuse areas of white light.

Auroras receive their energy from charged particles traveling between the Sun and Earth along bundled, ropelike magnetic fields. The particles are driven by the solar wind, captured by Earth’s magnetic field, and conducted downward toward the magnetic poles. They collide with oxygen and nitrogen atoms, KNOCKING away electrons to leave ions in excited states. These ions emit radiation at various wavelengths, creating the characteristic colours (red or greenish blue) of the aurora.

In addition to Earth, other planets in the solar system that have atmospheres and substantial magnetic fields—i.e., Jupiter, Saturn, Uranus, and Neptune—display auroral activity on a large scale. Auroras also have been observed on Jupiter’s moon Io, where they are produced by the interaction of Io’s atmosphere with Jupiter’s powerful magnetic field.

------Hope This Help :)

5.	Draw a diagram of a screw exhibiting1. rotational motion2. random motion3. revolutionary motion Please answer according to 6th grade level.
Answer» how can we DRAW a DIAGRAM here????

7.	U have to write a paragraph under this topic
Answer» PLEASE TELL US the TOPIC please

17.	Define radius vector in circular motion
Answer» $\huge { \boxed { \blue {hey \: \red b \red a \red b \red e \red s}}} \\ \bold \green { your \: answer}$ The radius for CIRCULAR motion is a vector. ... Notice that the radius vector is not CONSTANT. It does have a constant size; HOWEVER, its direction CHANGES as the OBJECT orbits. _________________________________ $\mathfrak {hope \: it \: helps \: uhh} \\ \orange {please \: mark \: brainleast}$

18.	Formula of a volume of cube
Answer» VOLUME of CUBE isV=a^3

28.	The derivative of f(x)=3x^2+2x+4 w.r.t to x is
Answer» EXPLANATION is WRITTEN in the IMAGE LINKED above.

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Explain the phenomenon under auroras.With images.

Aurora

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how can 3 resistors of resistances 1ohm ,3ohm and 5ohm be connected to give a total resistance of 2ohm

How to convert 114 minutes to angle (radian)

A car start moving with an acceleration 5m/s^2 for 10s then it decelerates with 2m/s^2 find

A brick afterc falling from a hill collide with ground with a momentum of 100kg m/s . if the mass of the brick is 5kg what was its velocity while colliding with the ground ?

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If the momentum of a flying bricks is 50kg m/s and its mass is 10kg . calculate its velocity ?

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A glass plate of length 3.5 cm and width 1.5 cm. what will be the maximum possible error in measuring the area of the plate?.Guys answer it fast I need help

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Hello..❤Plz Answer it ➡Can the equation (v=u+at) be used for a particle moving with non uniform acceleration?

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