129 + Interview Questions in Science Page 1 InterviewSolution

1.	How many atoms does a cube of sugar contain?
Answer» How many atoms does a cube of sugar contain?

Discussion

2.	If the ratio of the masses of two planets is 8 : 3 and the ratio of their diameters is 2 : 3, then what will be the ratio of their acceleration due to gravity
Answer» If the ratio of the masses of two planets is 8 : 3 and the ratio of their diameters is 2 : 3, then what will be the ratio of their acceleration due to gravity

Discussion

3.	83.If the radius of a star is R and it acts as a black body,what would be the temperature of star ,in which the rate of energy production is Q? (sigma stands for a Stefan's constant.)
Answer» 83.If the radius of a star is R and it acts as a black body,what would be the temperature of star ,in which the rate of energy production is Q? (sigma stands for a Stefan's constant.)

Discussion

4.	Which of the following can be used to measure time?
Answer» Which of the following can be used to measure time?

Discussion

5.	Examples of plasma and Bose Einstein's condensates
Answer» Examples of plasma and Bose Einstein's condensates

Discussion

6.	59.If the distance between earth and sun is increased by 3 times then the attraction between two will
Answer» 59.If the distance between earth and sun is increased by 3 times then the attraction between two will

Discussion

7.	Which is the brightest planet?
Answer» Which is the brightest planet?

Discussion

8.	Explain the formation of a star.
Answer» Explain the formation of a star.

Discussion

9.	The angular momentum of a planet of mass M moving around the sun in an elliptical orbit is →L. The magnitude of the areal velocity of the planet is :
Answer» The angular momentum of a planet of mass $M$ moving around the sun in an elliptical orbit is $\to L$ . The magnitude of the areal velocity of the planet is :

Discussion

10.	What are gamma rays?
Answer» What are gamma rays?

Discussion

11.	23/25 If the distance between the sun and the earth is increased by four times, then the attraction between the two will
Answer» 23/25 If the distance between the sun and the earth is increased by four times, then the attraction between the two will

Discussion

12.	Do stars daily travel in the same path?
Answer» Do stars daily travel in the same path?

Discussion

13.	A star begins its life in a cloud of gas and dust. The cloud is called a____.
Answer» A star begins its life in a cloud of gas and dust. The cloud is called a____.

Discussion

14.	State any four properties of a white dwarf.
Answer» State any four properties of a white dwarf.

Discussion

15.	How scientists calculate the distance between distant object (measured in light years) as it takes for light also takes 1000 years to reach it,?
Answer» How scientists calculate the distance between distant object (measured in light years) as it takes for light also takes 1000 years to reach it,?

Discussion

16.	How are nubulae formed ?
Answer» How are nubulae formed ?

Discussion

17.	The temperature of a furnace is 2324°C and the intensity is maximum in its energy spectrum of 1200°A. If the intensity in the spectrum of a star is maximum nearly at 4800°A,then the surface temperature of the star is:(1)8400°C(2)7200°C(3)6219.5°C(4)5900°C
Answer» The temperature of a furnace is 2324°C and the intensity is maximum in its energy spectrum of 1200°A. If the intensity in the spectrum of a star is maximum nearly at 4800°A,then the surface temperature of the star is: (1)8400°C (2)7200°C (3)6219.5°C (4)5900°C

Discussion

18.	1 metre can be defined as:
Answer» 1 metre can be defined as:

Discussion

19.	What are the stages of evolution of Stars like sun? Explain each stage
Answer» What are the stages of evolution of Stars like sun? Explain each stage

Discussion

20.	as dark enegy and dark matter existes between the stars and the galaxies of our universe does dark energy also existes between the universes in a multiverse?
Answer» as dark enegy and dark matter existes between the stars and the galaxies of our universe does dark energy also existes between the universes in a multiverse?

Discussion

21.	A star that has run of energy and shuts down becomes a:
Answer» A star that has run of energy and shuts down becomes a:

Discussion

22.	Why star turn into black hole? What is supernova?
Answer» Why star turn into black hole? What is supernova?

Discussion

23.	29. The root mean square velocity of the molecules in a sample of helium is 57 th that of the molecules in a sample of hydrogen if the temperature of the hydrogen sample is 0c that of helium samples is about 1. Oc 2. 0k 3. 273c 4. 100c
Answer» 29. The root mean square velocity of the molecules in a sample of helium is 57 th that of the molecules in a sample of hydrogen if the temperature of the hydrogen sample is 0c that of helium samples is about 1. Oc 2. 0k 3. 273c 4. 100c

Discussion

24.	State any 3 uses of spacesuits.
Answer» State any 3 uses of spacesuits.

Discussion

25.	How can we calculate light year in kilometers?
Answer» How can we calculate light year in kilometers?

Discussion

26.	The energy stored in an atomic nuclei of elements is known as _________.
Answer» The energy stored in an atomic nuclei of elements is known as _________.

Discussion

27.	Explain the process of the formation of the universe according to the big bang Theory. Please explain in brief.
Answer» Explain the process of the formation of the universe according to the big bang Theory. Please explain in brief.

Discussion

28.	Speed of a planet in an elliptical orbit with semi major axis 'a' about Sun of mass M at a dis†an ce r from the sun is
Answer» Speed of a planet in an elliptical orbit with semi major axis 'a' about Sun of mass M at a dis†an ce r from the sun is

Discussion

29.	40. Atomic weight of chlorine is 35.5.It has two isotopes of atomic weight 35 and 37.What is the percentage of the heavier isotope in the sample? (1) 5 (2) 10 (3) 25 (4) 20
Answer» 40. Atomic weight of chlorine is 35.5.It has two isotopes of atomic weight 35 and 37.What is the percentage of the heavier isotope in the sample? (1) 5 (2) 10 (3) 25 (4) 20

Discussion

30.	Find the value of g if the mass of the planet is 8.681×10^25 and the radius of the planet is 25362 km
Answer» Find the value of g if the mass of the planet is 8.681×10^25 and the radius of the planet is 25362 km

Discussion

31.	1.If the distance between earth and the sun were half of its present value, then hou of days will be there in a year? Hint : use 72 x R3 i.e., Kepler's third law.
Answer» 1.If the distance between earth and the sun were half of its present value, then hou of days will be there in a year? Hint : use 72 x R3 i.e., Kepler's third law.

Discussion

32.	Find the value of g if the mass of the planet is 5.97210^24kg and the radius of the planet is 6.378110^6km
Answer» Find the value of g if the mass of the planet is 5.97210^24kg and the radius of the planet is 6.378110^6km

Discussion

33.	The remains of stars after a supernova is:
Answer» The remains of stars after a supernova is:

Discussion

34.	If you are the sun, write about your properties in your own words.
Answer» If you are the sun, write about your properties in your own words.

Discussion

35.	Why stars will have colours?
Answer» Why stars will have colours?

Discussion

36.	A total number of neutron and proton in the universe is of the order of 1080 and that in the sun is the order of 1057. If we suppose all-stars to be of the size of the sun, how many stars are there in the universe.
Answer» A total number of neutron and proton in the universe is of the order of $10^{80}$ and that in the sun is the order of $10^{57}$ . If we suppose all-stars to be of the size of the sun, how many stars are there in the universe.

Discussion

37.	46.3 identical stars of mass M are located at the vertices of an equilateral triangle with side L. The speed at which they will move if they all revolve under the influence of one another's gravitational force in a circular orbit circumscribing the triangle while still preserving the equilateral triangle then find: 1.)speed of each star 2.)time period of each star 3.) mechanical energy of system.
Answer» 46.3 identical stars of mass M are located at the vertices of an equilateral triangle with side L. The speed at which they will move if they all revolve under the influence of one another's gravitational force in a circular orbit circumscribing the triangle while still preserving the equilateral triangle then find: 1.)speed of each star 2.)time period of each star 3.) mechanical energy of system.

Discussion

38.	Why do helium balloons fly?
Answer» Why do helium balloons fly?

Discussion

39.	After having the straight line 180∘, we should ___ this angle to get 90∘
Answer» After having the straight line $180^{\circ}$ , we should ___ this angle to get $90^{\circ}$

Discussion

40.	The two isotopic forms of boron are:
Answer» The two isotopic forms of boron are:

Discussion

41.	when a ball is being thrown ,it rolls for sometime and then finaly stops. why the planets and other objects in the solar system keeps moving ??why??
Answer» when a ball is being thrown ,it rolls for sometime and then finaly stops. why the planets and other objects in the solar system keeps moving ??why??

Discussion

42.	A planet of mass m is revolving around the sun of mass M in an elliptical orbit. If r and R are the minimum and maximum distances of the planet from the sun respectively, v and V are the minimum and maximum speed of the planet respectively, then
Answer» A planet of mass $m$ is revolving around the sun of mass $M$ in an elliptical orbit. If $r$ and $R$ are the minimum and maximum distances of the planet from the sun respectively, $v$ and $V$ are the minimum and maximum speed of the planet respectively, then

Discussion

43.	Find the value of g if the mass of the planet is 1.o24×10²⁴kg and the radius of the planet is 696340 km
Answer» Find the value of g if the mass of the planet is 1.o24×10²⁴kg and the radius of the planet is 696340 km

Discussion

44.	A. if you are the sun, write about your properties in your own words.B. Describe white dwarfs.
Answer» A. if you are the sun, write about your properties in your own words. B. Describe white dwarfs.

Discussion

45.	The mean lives of a radioactive subs†an ces are 40h and 60h for a α-emission and β- emission respectively. The decay cons†an t of the radioactive subs†an ce if it is decaying α and β simul†an eously is nearly (1)0.04h^{-1} (2)0.03h^{-1} (3)0.01h^{-1} (4)0.02h^{-1
Answer» The mean lives of a radioactive subs†an ces are 40h and 60h for a α-emission and β- emission respectively. The decay cons†an t of the radioactive subs†an ce if it is decaying α and β simul†an eously is nearly (1)0.04h^{-1} (2)0.03h^{-1} (3)0.01h^{-1} (4)0.02h^{-1

Discussion

46.	We all know that stars such as Sun produce their own heat and light. It is due to
Answer» We all know that stars such as Sun produce their own heat and light. It is due to

Discussion

47.	Consider a planet moving around a star in an elliptical orbit with period T.the area of elliptical orbit is proportional to?? (which power of T)
Answer» Consider a planet moving around a star in an elliptical orbit with period T.the area of elliptical orbit is proportional to?? (which power of T)

Discussion

48.	In a book i have read that sun convert hydrogen in helium.is it true?if true how it happen?
Answer» In a book i have read that sun convert hydrogen in helium.is it true?if true how it happen?

Discussion

49.	The rate at which the radiant energy reaches the surface of earth from the sun is about 1.4 KW/m2. The distance from the earth to the sun is about 1.5 1011 m, and the radius of sun is about 0.7 109m If the sun radiates as ideal black body, what is the temperature of its surface?
Answer» The rate at which the radiant energy reaches the surface of earth from the sun is about 1.4 KW/m². The distance from the earth to the sun is about 1.5 10¹¹ m, and the radius of sun is about 0.7 10⁹m If the sun radiates as ideal black body, what is the temperature of its surface?

Discussion

50.	What is Dark matter and baryonic mate?
Answer» What is Dark matter and baryonic mate?

Discussion

Explore topic-wise InterviewSolutions in .

How many atoms does a cube of sugar contain?

If the ratio of the masses of two planets is 8 : 3 and the ratio of their diameters is 2 : 3, then what will be the ratio of their acceleration due to gravity

83.If the radius of a star is R and it acts as a black body,what would be the temperature of star ,in which the rate of energy production is Q? (sigma stands for a Stefan's constant.)

Which of the following can be used to measure time?

Examples of plasma and Bose Einstein's condensates

59.If the distance between earth and sun is increased by 3 times then the attraction between two will

Which is the brightest planet?

Explain the formation of a star.

The angular momentum of a planet of mass M moving around the sun in an elliptical orbit is →L. The magnitude of the areal velocity of the planet is :

What are gamma rays?

23/25 If the distance between the sun and the earth is increased by four times, then the attraction between the two will

Do stars daily travel in the same path?

A star begins its life in a cloud of gas and dust. The cloud is called a____.

State any four properties of a white dwarf.

How scientists calculate the distance between distant object (measured in light years) as it takes for light also takes 1000 years to reach it,?

How are nubulae formed ?

The temperature of a furnace is 2324°C and the intensity is maximum in its energy spectrum of 1200°A. If the intensity in the spectrum of a star is maximum nearly at 4800°A,then the surface temperature of the star is:(1)8400°C(2)7200°C(3)6219.5°C(4)5900°C

1 metre can be defined as:

What are the stages of evolution of Stars like sun? Explain each stage

as dark enegy and dark matter existes between the stars and the galaxies of our universe does dark energy also existes between the universes in a multiverse?

A star that has run of energy and shuts down becomes a:

Why star turn into black hole? What is supernova?

29. The root mean square velocity of the molecules in a sample of helium is 57 th that of the molecules in a sample of hydrogen if the temperature of the hydrogen sample is 0c that of helium samples is about 1. Oc 2. 0k 3. 273c 4. 100c

State any 3 uses of spacesuits.

How can we calculate light year in kilometers?

The energy stored in an atomic nuclei of elements is known as _________.

Explain the process of the formation of the universe according to the big bang Theory. Please explain in brief.

Speed of a planet in an elliptical orbit with semi major axis 'a' about Sun of mass M at a dis†an ce r from the sun is

40. Atomic weight of chlorine is 35.5.It has two isotopes of atomic weight 35 and 37.What is the percentage of the heavier isotope in the sample? (1) 5 (2) 10 (3) 25 (4) 20

Find the value of g if the mass of the planet is 8.681×10^25 and the radius of the planet is 25362 km

1.If the distance between earth and the sun were half of its present value, then hou of days will be there in a year? Hint : use 72 x R3 i.e., Kepler's third law.

Find the value of g if the mass of the planet is 5.972*10^24kg and the radius of the planet is 6.3781*10^6km

The remains of stars after a supernova is:

If you are the sun, write about your properties in your own words.

Why stars will have colours?

A total number of neutron and proton in the universe is of the order of 1080 and that in the sun is the order of 1057. If we suppose all-stars to be of the size of the sun, how many stars are there in the universe.

Why do helium balloons fly?

After having the straight line 180∘, we should ___ this angle to get 90∘

The two isotopic forms of boron are:

when a ball is being thrown ,it rolls for sometime and then finaly stops. why the planets and other objects in the solar system keeps moving ??why??

A planet of mass m is revolving around the sun of mass M in an elliptical orbit. If r and R are the minimum and maximum distances of the planet from the sun respectively, v and V are the minimum and maximum speed of the planet respectively, then

Find the value of g if the mass of the planet is 1.o24×10²⁴kg and the radius of the planet is 696340 km

A. if you are the sun, write about your properties in your own words.B. Describe white dwarfs.

The mean lives of a radioactive subs†an ces are 40h and 60h for a α-emission and β- emission respectively. The decay cons†an t of the radioactive subs†an ce if it is decaying α and β simul†an eously is nearly (1)0.04h^{-1} (2)0.03h^{-1} (3)0.01h^{-1} (4)0.02h^{-1

We all know that stars such as Sun produce their own heat and light. It is due to

Consider a planet moving around a star in an elliptical orbit with period T.the area of elliptical orbit is proportional to?? (which power of T)

In a book i have read that sun convert hydrogen in helium.is it true?if true how it happen?

The rate at which the radiant energy reaches the surface of earth from the sun is about 1.4 KW/m2. The distance from the earth to the sun is about 1.5 1011 m, and the radius of sun is about 0.7 109m If the sun radiates as ideal black body, what is the temperature of its surface?

What is Dark matter and baryonic mate?

Find the value of g if the mass of the planet is 5.97210^24kg and the radius of the planet is 6.378110^6km