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Which one of the following instruments is not used for the measurement of length?
A new unit of length is chosen such that the speed of light in vacuum is unity. What is the distance between the sun and the earth in terms of the new unit if light takes 8 min and 20 cover this distance?
How many light years Alpha Centauri away from the Earth?
Which one of the following methods is used to measure distance of a planet or a star from the earth?
Which of the following properties of laser beam can be used to measure long distances?
The distance of the moon from the earth is about 60 times the radius of the earth. What will be diameter of the earth (approximately in degrees) as seen from the moon?
The Sun's angular diameter is measured to be 1920". The distance of the sun from the earth is 1.496 × 10^{11}m. What is the diameter of the sun?
What is the length of the arc of a circle of radius 30 cm which subtend an angle π/6 at the centre?
The order of magnitude of the diameter of the earth is (Diameter of the earth is 1.28 x 10^{7} m)
How many wavelengths of Kr^{36} are there in one metre?
The ratio of molar volume to atomic volume for 1 mole of hydrogen is (Take size of hydrogen molecule to be 1 Å)
If the size of bacter ia is 1 micron, what will be the number of it in 1 m length?
Astronomical unit (AU) is the distance between earth and the sun, 1 AU is equal to
The ratio of the volume of the atom to the volume of the nucleus is of the order of
102 videos411 docs121 tests

102 videos411 docs121 tests
