Rocket propellants - class-XII
Description: rocket propellants | |
Number of Questions: 15 | |
Created by: Sangita Pandit | |
Tags: space - a world of wonders universe and space science chemistry in daily life space missions physics |
The formula for critical velocity is :
The escape velocity for any satellite to be placed in a orbit is :
The correct relation between escape velocity $v _e$ and critical velocity $v _0$ is :
Payload ratio is :
Which of the following satellites have been successfully built by India ?
When the fuel in the rocket burns, the rocket moves vertically upward due to :
Multistage rocket is used because:
Streamlining of the rocket :
Which of the following need to be considered when the rocket operates:
(A): As the rocket consumes fuel at every instant, its mass goes on decreasing.
(B): The acceleration due to gravity changes continuously as the rocket ascends.
(C): The atmosphere offers resistance in the lower strata of atmosphere.
Fill in the blank.
Larger the mass of the rocket _____ is the acceleration.
Suppose a rocket with an initial mass $M _0$ expels a mass $\delta m$ in the form of gases in time $\Delta t$, then the mass of the rocket after time t is :
Blow a balloon and let it go. You will find it moving in the direction opposite to the direction in which the air is ejected. This demonstrates :
The propulsion of a rocket is based on the principle of conservation of
The scientific instrument which is usually placed in the front region of the rocket is called :
The principle of rocket propulsion depends on :