Related Questions

Read the following passage carefully and then choose the right word to complete the sentence that follows. Rockets are very expensive as it can be used only once. Appled scientists have therefore develped a reusable space craft called a space shuttle which takes off like a rocket; however, does no get destroyed as it returns to earth. It can also be used to lunch satellired into space, retrieve them from space if any repairing os required and allow around 8 scientists to crryout experiments in space. The space shuttle does not get.
A flattened
B enlarged
C ruined
D developed
In a engineering, test, a rocket sled is propelled into a target. If the sled's distance d in meters from the target is given by the fomula d = - 1.5 t2+120, where t is the number of seconds after rocket ignition, then how many seconds have passed since rocket ignition when the sled is 10 meters from the target?
A 2.58
B 8.59
C 8.94
D 9.31
What is the minimum velocity required for a rocket to overcome earth's gravity and travel into space?
A 18 km\/sec
B 11.2 km\/sec
C 21 km\/sec
D 35 km\/sec
What is the escape velocity of the rocket in the earth?
A 12.2 km/sec
B 10.2 km/sec
C 13.2 km/sec
D 11.2 km/sec
Only rocket engines can be propelled to space because
A They can generate very high thrust
B They have high propulsion efficiency
C These engines can work on several fuels
D They are not air breathing engines
The escape velocity of a body on earth which is independent of its mass is about __________ km/second.
A 3
B 7
C 11
D 15
A toy rocket is launched straight up. At the exact top-of its' flight path, which of the followings is true?
A Its velocity and acceleration are zero
B Its velocity is zero and acceleration is 9.8 m/s2
C Its velocity is 9.8 m/s and acceleration is zero
D Its velocity is 9.8 m/s and acceleration is 9.8m/s2
A toy rocket is launched straight up, At the exact to of its' flight path, which of the followings is true?
A Its velocity and acceleration are zero
B Its velocity is zero and acceleration is 9.8 m/s2
C Its velocity is 9:8 m/s and acceleration is zero
D Its velocity is 9.8 m/s and acceleration is zero
The rocket launched from French carried how many satellites?
A 4
B 5
C 6
D 7
China has successfully launched two Beidou-3 satellites on board of which carrier rocket?
A Kuaizhou
B Chang\u20134
C Simorgh
D Long March\u20133B

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