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
Sahay Sir > Question Answers > 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
Two stars of masses 3×10^31 kg each, and at distance 2×10^11 m rotate in a plane about their common centre of mass O. A meteorite passes through O moving perpendicular to the star’s rotation plane. In order to escape from the gravitational field of this double star, the minimum speed that meteorite should have at O is : (take Gravitational constant G=6.67×10^11Nm 2kg^−2 )
19
Sep
Two stars of masses 3×10^31 kg each, and at distance 2×10^11 m rotate in a plane about their common centre of mass O. A meteorite passes through O moving perpendicular to the star’s rotation plane. In order to escape from the gravitational field of this double star, the minimum speed that meteorite should have at [...]
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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 ,
Two stars of masses 3×10^31 kg each ,
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:
19
Sep
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 [...]
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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 ,
A test particle is moving in a circular orbit in the gravitational field produced by a mass density ρ(r)= r/2K . Identify the correct relation between the radius R of the particle’s orbit and its period T.
19
Sep
A test particle is moving in a circular orbit in the gravitational field produced by a mass density ρ(r)= r/2K . Identify the correct relation between the radius R of the particle’s orbit and its period T. A rocket has to be launched from earth in such a way that it never returns. If E [...]
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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 ,
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, what should be the minimum energy that the launcher should have if the same rocket is to be launched from the surface of the moon ? Assume that the density of the earth and the moon are equal and that the earth’s volume is 64 times the volume of the moon :
19
Sep
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, what should be the minimum energy that the launcher should have if the same rocket is to be launched from the surface of the moon ? Assume that [...]
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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 ,
Four identical particles of mass M are located at the corners of a square of side a . What should be their speed if each of them revolves under the influence of other’s gravitational field in a circular orbit circumscribing the square?
19
Sep
Four identical particles of mass M are located at the corners of a square of side a . What should be their speed if each of them revolves under the influence of other’s gravitational field in a circular orbit circumscribing the square? A source of sound is approaching an observer with speed of 30ms and [...]
Two tuning forks A and B having a frequency of 500 Hz each are placed with B to the right of A. An observer in between the forks in moving towards B with a speed of 25 m/s. The speed of sound is 345 m/s and the wind speed is 5 m/s from A to B. Calculate the difference in the two frequencies heard by observer.
19
Sep
Two tuning forks A and B having a frequency of 500 Hz each are placed with B to the right of A. An observer in between the forks in moving towards B with a speed of 25 m/s. The speed of sound is 345 m/s and the wind speed is 5 m/s from A to [...]
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
19
Sep
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 A source of sound is approaching an observer with speed of 30ms and the observer is approaching the [...]