Physics
General
Easy

Question

There are two planets, the ratio of radius of two planets is k but the acceleration due to gravity of both planets are g what will be the ratio of their escape velocity.

  1. open parentheses k g close parentheses to the power of 1 divided by 2 end exponent
  2. open parentheses k g close parentheses to the power of negative 1 divided by 2 end exponent
  3. open parentheses k g squared close parentheses
  4. open parentheses k g close parentheses to the power of negative 2 end exponent

The correct answer is: open parentheses k g close parentheses to the power of 1 divided by 2 end exponent

Book A Free Demo

+91

Grade*

Related Questions to study

General
physics

The escape velocity of a planet having mass 6 times and radius 2 times as that of earth is.........

The escape velocity of a planet having mass 6 times and radius 2 times as that of earth is.........

physicsGeneral
General
chemistry-

Correct statements from the graph

I) Above 1073K, capital delta G to the power of 0 end exponent for the formation of Fe2O3 is less negative than capital delta G to the power of 0 end exponent for the formation of CO from carbon
II) Above 1073K, Carbon can reduce Fe2O3
III) Below 1073K, CO can reduce Fe2O3
IV) In blast furnace, reduction of Fe2O3 occurs in different temperature ranges with below 1073K by CO (or) above 1073K by carbon

Correct statements from the graph

I) Above 1073K, capital delta G to the power of 0 end exponent for the formation of Fe2O3 is less negative than capital delta G to the power of 0 end exponent for the formation of CO from carbon
II) Above 1073K, Carbon can reduce Fe2O3
III) Below 1073K, CO can reduce Fe2O3
IV) In blast furnace, reduction of Fe2O3 occurs in different temperature ranges with below 1073K by CO (or) above 1073K by carbon

chemistry-General
General
chemistry-

Correct statement(s) regarding the graph

Correct statement(s) regarding the graph

chemistry-General
General
chemistry-

From the graph, which is the best reducing agent to reduce Cu2 O at high temperature

From the graph, which is the best reducing agent to reduce Cu2 O at high temperature

chemistry-General
General
chemistry-

Correct statement(s) regarding the graph

I) Above 983K, Carbon can reduce any metal oxide at high temperature and itself oxidised to CO
II) In the first reaction (Formation of CO2 from ‘C’) capital delta S to the power of 0 end exponent=0 & capital delta G to the power of 0 end exponentremains nearly same, i.e it is independent of temperature
III) In the second reaction, (formation of CO) , there is increase in entropy & capital delta S to the power of 0 end exponent=+ve&blank capital delta G to the power of 0 end exponent becomes more –ve with increase in temperature
IV) In third reaction (formation of CO2 from CO), there is a decrease in entropy capital delta S to the power of 0 end exponent=-ve & capital delta G to the power of 0 end exponent becomes less –ve with increase in temperature

Correct statement(s) regarding the graph

I) Above 983K, Carbon can reduce any metal oxide at high temperature and itself oxidised to CO
II) In the first reaction (Formation of CO2 from ‘C’) capital delta S to the power of 0 end exponent=0 & capital delta G to the power of 0 end exponentremains nearly same, i.e it is independent of temperature
III) In the second reaction, (formation of CO) , there is increase in entropy & capital delta S to the power of 0 end exponent=+ve&blank capital delta G to the power of 0 end exponent becomes more –ve with increase in temperature
IV) In third reaction (formation of CO2 from CO), there is a decrease in entropy capital delta S to the power of 0 end exponent=-ve & capital delta G to the power of 0 end exponent becomes less –ve with increase in temperature

chemistry-General
General
chemistry-

Ellingham diagram is given below for the formation of some oxides. Then select the correct combination

Ellingham diagram is given below for the formation of some oxides. Then select the correct combination

chemistry-General
General
chemistry-

From Ellingham diagram the correct statements
a) 4 C u plus O subscript 2 end subscript rightwards arrow 2 C u subscript 2 end subscript O
b) 2 C plus O subscript 2 end subscript rightwards arrow 2 C O
c) 2 Z n plus O subscript 2 end subscript rightwards arrow 2 Z n O

From Ellingham diagram the correct statements
a) 4 C u plus O subscript 2 end subscript rightwards arrow 2 C u subscript 2 end subscript O
b) 2 C plus O subscript 2 end subscript rightwards arrow 2 C O
c) 2 Z n plus O subscript 2 end subscript rightwards arrow 2 Z n O

chemistry-General
General
physics

An artificial satellite is revolving round the earth in a circular orbit its velocity is half the escape velocity. Its height from the earth surface is .=...km

An artificial satellite is revolving round the earth in a circular orbit its velocity is half the escape velocity. Its height from the earth surface is .=...km

physicsGeneral
General
physics

The escape velocity of a body from earth's surface is Vee. The escape velocity of the same body from a height equal to  from earth's surface will be

The escape velocity of a body from earth's surface is Vee. The escape velocity of the same body from a height equal to  from earth's surface will be

physicsGeneral
General
physics

Two small and heavy sphere, each of mass M, are placed distance r apart on a horizontal surface the gravitational potential at a mid point on the line joining the center of spheres is

Two small and heavy sphere, each of mass M, are placed distance r apart on a horizontal surface the gravitational potential at a mid point on the line joining the center of spheres is

physicsGeneral
General
physics

The escape velocity of an object from the earth depends upon the mass of earth (M), its mean density ( rho ), its radius (R) and gravitational constant (G), thus the formula for escape veloctiy is

The escape velocity of an object from the earth depends upon the mass of earth (M), its mean density ( rho ), its radius (R) and gravitational constant (G), thus the formula for escape veloctiy is

physicsGeneral
General
physics

The escape velocity of a particle of mass m varies as

The escape velocity of a particle of mass m varies as

physicsGeneral
General
physics

The escape velocity of a projectile from the earth is approximately

The escape velocity of a projectile from the earth is approximately

physicsGeneral
General
physics

If g is the acceleration due to gravity at the earth's surface and r is the radius of the earth, the escape velocity for the body to escape out of earth's gravitational field is……..

If g is the acceleration due to gravity at the earth's surface and r is the radius of the earth, the escape velocity for the body to escape out of earth's gravitational field is……..

physicsGeneral
General
physics

The escape velocity from the earth is about  11kms-1. The escape velocity from a planet having twice the radius and the same mean density as the earth is ... kms -1

The escape velocity from the earth is about  11kms-1. The escape velocity from a planet having twice the radius and the same mean density as the earth is ... kms -1

physicsGeneral