NEET Physics: Questions 1832 - 1837 of 2099
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Question number: 1832
Read the passage given below and answer the questions that follows:
It can be assumed that orbits of earth and mars are nearly circular around the sun. It is proposed to launch an artificial planet around the sun such that its apogee is at the orbit of mars while its perigee is at the orbit of earth. Let T e and T m be periods of revolution of earth and mars. Further the variables are assigned the meanings as follows.
M e → Mass of earth
M m → Mass of mars
L e → Angular momentum of earth around the sun
L m → Angular momentum of mars around the sun
R e → Semi major axis of earth’s orbit.
R m → Semi major axis of mars orbit.
M → Mass of the artificial planet
E e → Total energy of earth
E m → Total energy of mars.
Question number: 1833 (1 of 2 Based on Passage) Show Passage
Question number: 1834 (2 of 2 Based on Passage) Show Passage
Question number: 1835
A string on a musical instrument is 70 cm long and its fundamental frequency is 235 Hz. If the desired frequency of 950 Hz, is to be produced, the required length of the string is
Question number: 1836
Question number: 1837
A spaceship is launched into a circular orbit close to earth’s surface. What additional velocity has now to be imparted to the spaceship in the orbit to overcome the gravitational pull? (Radius of earth = 6400 km, g = 9.8 m/sec 2)