Let us assume that our galaxy consists o...

Let us assume that our galaxy consists of `2.5xx10^(11)` stars each of one solar mass. How long will a star at a distance of 50,000 ly from the galactic centre take to complete one revolution ? Take the diameter of the Milky Way to be `10^5` ly.

Text Solution

Verified by Experts

The correct Answer is:

`3.54xx10^8` years

Topper's Solved these Questions

NEWTONIAN GRAVITATION AND PLANETARY MOTION
CHHAYA PUBLICATION|Exercise PROBLEM SET -II|29 Videos
NEWTONIAN GRAVITATION AND PLANETARY MOTION
CHHAYA PUBLICATION|Exercise PROBLEM SET -II (Hots Numerical Problems)|14 Videos
NEWTONIAN GRAVITATION AND PLANETARY MOTION
CHHAYA PUBLICATION|Exercise EXERCISE (Short Answer Type Questions-II)|4 Videos
NEWTON'S LAWS OF MOTION
CHHAYA PUBLICATION|Exercise CBSE SCANNER|24 Videos
ONE - DIMENSIONAL MOTION
CHHAYA PUBLICATION|Exercise CBSE SCANNER|19 Videos

Similar Questions

Explore conceptually related problems

If decomposition of H_(2)O_(2) is a first order reaction , how long would it take to complete one- third of the decomposition ? The rate constant of this decomposition reaction is 3xx10^(-2)"min"^(-1) .

Estimate the average drift speed of conduction electrons in a copper wire of cross sectional area 1 times 10^-7 m^2 carrying a current of 1.5 A.Assume that each copper atom contributes one conduction electron. The density of copper is 9 times 10^3 kg.m^-3 and its atomic mass is 63.5 u .

In has been estimated that the total energy radiated by the sun is 3.8xx10^26 J per second. The source of energy of stars is a thermonuclear reaction called nuclear fusion. Fusion reactions are not controlled. It is presumed that the energy of stars is due to two processes called proton-proton cycle and carbon nitrogen cycle. Fusion cannot take place at ordinary temperature. This, hydrogen bomb uses a small fission bomb, which on explosion causes the temperature to rise very high about 10^7 K. We have yet to see how a hydrogen bomb can be used for peaceful life-sustaining purpose. Energy released in the process of fusion is due to mass defect. It is also called Q-value. Q =Deltamc^2 , Deltam= mass defect Answer the following questions based on above passage: Fusion reaction takes place at about:

The well know mineral flourite is chemically calcium fluoride. It is a well known fact that in one unit cell of this mineral, there are four Ca^(2+) ions and eight F^(-) ions and Ca^(2+) ions are arranged in f.c.c. lattice. The F^(-) ions fill all the tetrahedral holes in the face centred cubic lattice of Ca^(2+) ions. The edge length of the unit cell is 5.46xx10^(-8) cm. The density of the solid is 3.18"g cm"^(-3) . Use this information to calculate Avogadro's number (Molar mass of CaF_(2)=78.0"g mol"^(-1) )

Two stars each of one solar mass (=2xx10^(30)kg) are approaching each other for a head-on collision . When they are 10^9 km apart, their speeds are negligible. What is the speed with which they collide ? The radius of each star is 10^4km . Assume the stars remain undistorted until they collide. (Use the known value of G).

CHHAYA PUBLICATION-NEWTONIAN GRAVITATION AND PLANETARY MOTION-PROBLEM SET -I

Show that if the earth stops rotating about its axis, then the acceler...
Text Solution
|
Choose the correct alternative : (i) Acceleration due to gravity (in...
Text Solution
|
Choose the correct alternative : (ii) Acceleration due to gravity (i...
Text Solution
|
Choose the correct alternative : (iii) Acceleration due to gravity i...
Text Solution
|
Choose the correct alternative : (iv) The formula -GMm(1//r2-1//r1) ...
Text Solution
|
If both the radius and the mean density of a planet are half the radi...
Text Solution
|
Calculate the angular velocity of the earth for which effective accele...
Text Solution
|
Find the percentage decrease in the weight of a body when taken 32 km...
Text Solution
|
The density of a planet is 1/3 rd that of the earth and its radius is ...
Text Solution
|
Determine the value of the escape velocity from the surface of the moo...
Text Solution
|
The radius of a planet is double than that of the earth but their aver...
Text Solution
|
How much energy would be needed for a body of mass 10 kg to escape fro...
Text Solution
|
The planet Mercury revolves around the sun once in 88 days. If the mea...
Text Solution
|
Two planets are revolving around a star and the ratio of their average...
Text Solution
|
An artificial satellite revolves around the earth in a circular path ...
Text Solution
|
Let us assume that our galaxy consists of 2.5xx10^(11) stars each of o...
Text Solution
|
Choose the correct alternative: (i) If the zero of potential energy ...
Text Solution
|
Choose the correct alternative: (ii) The energy required to launch a...
Text Solution
|
A satellite of mass 1000 kg moves in a circular orbit of radius 7000 k...
Text Solution
|
An artificial satellites is revolving at a height of 500 km above the ...
Text Solution
|