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Earn 100

The physics behind fusion test reactor is:

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Important Questions on Physical World and Measurement

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The dimension of light year
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The nearest star to our solar system is 4.3 light years away. The distance of this star in Parsec is (Mean distance between the earth and the sun =1.5×1011 m and one light year =9.46×1015 m
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Which of the following is a possible final step in applying the scientific method?
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Match the columns I and II
  Column I   Column II
A Stoke's law I Pressure and energy
B Turbulence II Hydraulic lift
C Bernoulli's Principle III Viscous drag
D Pascal's law IV Reynold's number

The correct match is

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Consider a particle moving along the positive direction of X-axis. The velocity of the particle is given by v=αx (α is a positive constant). At time t=0, if the particle is located at x=0, the time dependence of the velocity and the acceleration of the particle are respectively.
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If E and H represents the intensity of electric field and magnetizing field respectively, then the unit of EH will be:

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A huge circular arc of length 4.4 ly subtends an angle 4s at the centre of the circle. How long it would take for a body to complete 4 revolution if its speed is 8 AU per second?
Given : 1 ly=9.46×1015 m

1 AU=1.5×1011 m