Chapter 10 – Gravitation
An engine running at speed v/10 sounds a whistle of frequency 600 Hz. A passenger in a train coming from the opposite side at speed v/15 experiences this whistle
13
Sep
An engine running at speed v/10 sounds a whistle of frequency 600 Hz. A passenger in a train coming from the opposite side at speed v/15 experiences this whistle An engine running at speed v/10 sounds a whistle of frequency 600 Hz. A passenger in a train coming from the opposite side at speed v/15 [...]
A sound wave of wavelength 0.40 m enters the tube at S. The smallest radius r of the circular segment to hear minimum at detector D must be
13
Sep
A sound wave of wavelength 0.40 m enters the tube at S. The smallest radius r of the circular segment to hear minimum at detector D must be A sound wave of wavelength 0.40 m enters the tube at S. The smallest radius r of the circular segment to hear minimum at detector D must [...]
A stretched string of length 1m fixed at both ends , having a mass of 5×10^−4 kg is under a tension of 20 N. It is plucked at a point situated at 25 cm from one end . The stretched string would vibrate with a frequency of
13
Sep
A stretched string of length 1m fixed at both ends , having a mass of 5×10^−4 kg is under a tension of 20 N. It is plucked at a point situated at 25 cm from one end . The stretched string would vibrate with a frequency of A stretched string of length 1m fixed at [...]
When a source moves away from a stationary observer, the frequency is 6/7 times the original frequency. Given: speed of sound =330 m/s. The speed of the source is
13
Sep
When a source moves away from a stationary observer, the frequency is 6/7 times the original frequency. Given: speed of sound =330 m/s. The speed of the source is the frequency is 6/7 times the original frequency. Given: speed of sound =330 m/s. The speed of the source is When a source moves away from [...]
A tuning fork of frequency 380 Hz is moving towards a wall with a velocity of 4 m/s Then the number of beats heard by a stationary listener between direct and reflected sound will be (velocity of sound in air is 340 m/s)
13
Sep
A tuning fork of frequency 380 Hz is moving towards a wall with a velocity of 4 m/s Then the number of beats heard by a stationary listener between direct and reflected sound will be (velocity of sound in air is 340 m/s) Energy required to move a body of mass m from an orbit [...]
A source of sound is travelling with a velocity of 30 ms towards a stationary observer. If actual frequency of source is 1000 Hz and the wind is blowing with velocity 20 ms in a direction at 60∘C with the direction of motion of source, then the apparent frequency heard by observer is (speed of sound is 340 ms)
13
Sep
A source of sound is travelling with a velocity of 30 ms towards a stationary observer. If actual frequency of source is 1000 Hz and the wind is blowing with velocity 20 ms in a direction at 60∘C with the direction of motion of source, then the apparent frequency heard by observer is (speed of [...]
Energy required to move a body of mass m from an orbit of radius 2R to 3R is (where M= mass of earth, R= radius of earth)
13
Sep
Energy required to move a body of mass m from an orbit of radius 2R to 3R is (where M= mass of earth, R= radius of earth) Energy required to move a body of mass m from an orbit of radius 2R to 3R is (where M= mass of earth R= radius of earth) September [...]
Statement 1: The value of escape velocity from the surface of earth at 30 and 60 is v1=2ve,v2=2/3ve. Statement II: The value of escape velocity is independent of angle of projection.
13
Sep
Statement 1: The value of escape velocity from the surface of earth at 30 and 60 is v1=2ve,v2=2/3ve. Statement II: The value of escape velocity is independent of angle of projection. Statement 1: The value of escape velocity from the surface of earth at 30 and 60 is v1=2ve v2=2/3ve. Statement II: The value of [...]
Statement I: The force of gravitation between a sphere and a rod of mass M2 is = (GM1M2)/r. Statement II: Newton’s law of gravitation holds correct for point masses.
13
Sep
Statement I: The force of gravitation between a sphere and a rod of mass M2 is = (GM1M2)/r. Statement II: Newton’s law of gravitation holds correct for point masses. Statement I: The force of gravitation between a sphere and a rod of mass M2 is = (GM1M2)/r. Statement II: Newton's law of gravitation holds correct [...]
Statement 1 : Kepler’s second law can be understood by conservation of angular momentum principle. Statement 2 : Kepler’s second law is related with areal velocity which can further be proved to be based on conservation of angular momentum as (dA/dt)=(r^2ω)/2.
13
Sep
Statement 1 : Kepler’s second law can be understood by conservation of angular momentum principle. Statement 2 : Kepler’s second law is related with areal velocity which can further be proved to be based on conservation of angular momentum as (dA/dt)=(r^2ω)/2. In order to shift a body of mass m from a circular orbit of [...]