Physics
General
Easy
Question
The velocity with which a projectile must be fired so that it escapes earth's gravitational does not depend on ……
- mass of earth
- Mass of the projectile
- radius of he projectiles' orbit
- Gravitational constant
The correct answer is: Mass of the projectile
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The structure of 
is
The structure of is
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Escape velocity on the surface of earth is 11.2kms-1 Escape velocity from a planet whose masses the same as that of earth and radius 1/4 that of earth is.....kms-1
Escape velocity on the surface of earth is 11.2kms-1 Escape velocity from a planet whose masses the same as that of earth and radius 1/4 that of earth is.....kms-1
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chemistry-
Correct configuration of the following molecule is : 
,
Correct configuration of the following molecule is : ,
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3 Particle each of mass are kept at vertices of an equilateral triangle of side L. The gravitatioml field at center due to these particles is……
3 Particle each of mass are kept at vertices of an equilateral triangle of side L. The gravitatioml field at center due to these particles is……
physicsGeneral
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Given mass of the moon is 
of the mass of the earth and corresponding radius is 
of the earth, If escape velocity on the earth surface is 11.2kms-1 the value of same on the surface of moon is.....kms-1
Given mass of the moon is of the mass of the earth and corresponding radius is of the earth, If escape velocity on the earth surface is 11.2kms-1 the value of same on the surface of moon is.....kms-1
physicsGeneral
physics
The escape velocity of a body on the surface of the earth is 11.2km/sec. If the mass of the earth is increases to twice its present value and the radius of the earth becomes half, the escape velocity becomes...kms-1
The escape velocity of a body on the surface of the earth is 11.2km/sec. If the mass of the earth is increases to twice its present value and the radius of the earth becomes half, the escape velocity becomes...kms-1
physicsGeneral
physics
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.
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.
physicsGeneral
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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
chemistry-
Correct statements from the graph
I) Above 1073K, 
for the formation of Fe2O3 is less negative than 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, for the formation of Fe2O3 is less negative than 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
chemistry-
Correct statement(s) regarding the graph
Correct statement(s) regarding the graph
chemistry-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
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’) 
=0 & remains nearly same, i.e it is independent of temperature
III) In the second reaction, (formation of CO) , there is increase in entropy & =+ve&
becomes more –ve with increase in temperature
IV) In third reaction (formation of CO2 from CO), there is a decrease in entropy =-ve & 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’) =0 & remains nearly same, i.e it is independent of temperature
III) In the second reaction, (formation of CO) , there is increase in entropy & =+ve& becomes more –ve with increase in temperature
IV) In third reaction (formation of CO2 from CO), there is a decrease in entropy =-ve & becomes less –ve with increase in temperature
chemistry-General
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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
chemistry-
From Ellingham diagram the correct statements
a) 
b) 
c) 
From Ellingham diagram the correct statements
a)
b)
c)
chemistry-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
