Tag: physics

Questions Related to physics

The people working with radioactive materials should put on special

physics energy production hazards and safety measures of radiations harmful effects and safety precautions for radiations nuclear physics

  1. iron lined aprons and copper gloves.

  2. silver lined aprons and silver gloves.

  3. lead lined aprons and lead gloves

  4. any of the above can be used.

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Correct Option: C
Explanation:

The people working with radioactive naturals are required to follow strictly the safety rules like they should put on special lead lined aprons and lead gloves. They should handle the radioactive naturals with long lead tongs.

Astronomers have observed a small massive object at the centre of our Milky Way galaxy. A ringof material orbits this massive object; the ring has a diameter of about 15 light years and an orbital  speed of 200$\mathrm { km } / \mathrm { s }$ . What is the mass of the massive object at the centre of the minky  Way? Given $G = 6.67 \times 10 ^ { - 11 } \mathrm { Nm } ^ { 2 } \mathrm { kg } ^ { 2 }$ and 1 light year $= 9.5 \times 10 ^ { 15 } \mathrm { m }$ 

physics sky vision types of galaxies galaxies constellations

  1. Approximately $8.1 \times 10 ^ { 37 } \mathrm { kg }$

  2. approximately $4.3 \times 10 ^ { 37 } \mathrm { kg }$

  3. Approximately $6 \times 10 ^ { 37 } \mathrm { kg }$

  4. approximately $3 \times 10 ^ { 37 } \mathrm { kg }$

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Correct Option: B

Milky way is _____ in shape.

physics sky vision types of galaxies galaxies constellations

  1. Elliptical

  2. Spiral

  3. Regular

  4. Circular

Show answer
Correct Option: B
Explanation:

Ans: Spiral 

The nearest galaxy to the Milky Way is _________.

physics sky vision types of galaxies galaxies constellations

  1. Fornax galaxy

  2. Samprero galaxy

  3. Andromeda galaxy

  4. Pinwheel galaxy

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Correct Option: C

The stars in space are _________________.

physics sky vision types of galaxies galaxies constellations

  1. uniformly spread out.

  2. distributed completely at random

  3. mostly contained within widely separated galaxies

  4. chiefly in the Milky Way

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Correct Option: C
Explanation:

Stars are not scattered randomly through space they are gathered together into vast groups also known as galaxies.

Answer is $C$

The Milky Way is ________________.

physics sky vision types of galaxies galaxies constellations

  1. a gas cloud in the solar system

  2. a gas cloud in the galaxy of which the sun is a member

  3. the galaxy of which the sun is a member

  4. a nearby galaxy

Show answer
Correct Option: C
Explanation:

Milky way is the galaxy which contains as our solar system hence it also contains sun.

Answer is $C$

Milky Way galaxy is in cluster of galaxies which is also known as:

physics sky vision types of galaxies galaxies constellations

  1. local group

  2. big bang group

  3. temperate group

  4. none of the above

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Correct Option: A
Explanation:

The milk way galaxy cluster is also known as the local supercluster as local group.


The visible light spectrum of a typical star like our Sun shows:

physics sky vision types of galaxies galaxies constellations

  1. bright emission lines

  2. shows all of the other answers depending on the season on Earth

  3. no spectral lines at all

  4. dark absorption lines

Show answer
Correct Option: D
Explanation:

They show dark absorption light which tells us about the temperature of star like oxide lines are there only in cool stars while hot stars show helium lines.

What is known as an eclipse?

physics effects of light eclipses elementary ideas of astronomy shadow formation and optical medium

  1. Astronomical event when one celestial body partially or totally cover another celestial object

  2. Astronomical event when one celestial body cover another meteor

  3. Astronomical event when one meteor partially or totally cover another meteor

  4. None

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Correct Option: A
Explanation:

An eclipse is an event where one heavenly body compeletely or partially blocks the light from the other heavenly body.

Which type of eclipse is known when Earth, Moon and Sun doesn't align in straight line and Moon only partially covers sun?

physics effects of light eclipses elementary ideas of astronomy shadow formation and optical medium

  1. Total Solar Eclipse

  2. Partial Solar Eclipse

  3. Annular Solar Eclipse

  4. None

Show answer
Correct Option: B
Explanation:

When Moon is between the Sun and the Earth but doesn't align in a straight line results in a partial solar eclipse.

Partial Solar Eclipse is known when Earth, Moon and Sun doesn't align in straight line and Moon only partially covers sun.