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Sahay Sir > Question Answers > JEE Mains Physics 2002-2019 Solved Video Solutions > Chapter 6 - Gravitation > The energy required to take a satellite to a height h above Earth surface ( radius of Earth = 6.4×10^3 km) is E1 and kinetic energy required for the satellite to be in a circular orbit at this height is E2. The value of h for which E1 and E2 are equal, is:

The energy required to take a satellite to a height h above Earth surface ( radius of Earth = 6.4×10^3 km) is E1 and kinetic energy required for the satellite to be in a circular orbit at this height is E2. The value of h for which E1 and E2 are equal, is:

A rocket has to be launched from earth in such a way that it never returns. If E is the minimum energy delivered by the rocket launcher A source of sound is approaching an observer with speed of 30ms and the observer is approaching the source with a speed 60 ms". Then the fractional change in the frequency of sound in air (330ms) is