Related Questions

Who proposed the laws of planetary motion?
A Isaac Newton
B Johannes Kepler
C Galileo
D Roger Bacon
Who enunciated the laws of planetary motion?
A Nicolaus Copernicus
B Johannes Kepler
C Isaac Newton
D Galileo
Point out which part is grammatically incorrect. 'Good people will make good laws ' 'but good' 'laws passed by a few' 'does not necessarily make' 'a good society' 'No error'
A good people will make good laws
B laws passed by a few
C do not necessarily make
D a good society
m ভরের একটি উপগ্রহ R ব্যাসার্ধের একটি বৃত্তাকার কক্ষপথে M ভরের একটি গ্রহকে প্রদক্ষিণ করে। একটি পূর্ণ ঘূর্ণনের জন্য প্রয়োজনীয় সময় নিচের কোনটির সমানুপাতিক? (A satellite of mass m orbits a planet of mass M in a circular orbit of radius R. The time required for one complete revolution is proportional to which of the following?)
A M
B R3/2
C R2
Which one of the following is a type of planetary wind?
A Monsoons
B Loo
C Westerlies
D Tornadoes
Which one of the following statements correctly describes the construction of a planetary gear type differential?
A The six planetary pinions rotate in constant mesh with the internal gears.
B One drive shaft is splined to the central gear and the other to the planetary gear.
C Each planetary pinion gear meshes with both the central gear and the internal gear.
D The internal gear is fixed to the planetary gear.
Who modified Bohr's theory by introducing elliptical orbits for electron path?
A Hund
B Thomson
C Rutherford
D Sommerfeld
The ratio of the total solar radiant energy returned by a planetary body to the total radiant energy incident on the body, the called:
A Reflectance
B Reflectance factor
C Albedo
D None of these
The planets are kept in motion in their respective orbits by ________
A Their great size and spherical shape
B The rotation and density
C Gravitation and centrifugal force
D Rotation of the sun on its axis
The orbits of planets around the Sun, or of satellites around the Earth, can be ________
A Circular and elliptic
B Circular and hyperbolic
C Elliptic and parabolic
D Parabolic and hyperbolic

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