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The planet is observed from two diametri...

The planet is observed from two diametrically opposite points A and B on Eath. The angle `theta` subtended at the planet by the two directions of observation is `1^(@)8'`. Given the diameter of the Earth to be about `1.276xx10^(7)m`, computer the distanc

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The correct Answer is:
`4.06xx10^(8)m`
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The planet is observed from two diametrically opposite points A and B on Eath. The angle theta subtended at the planet by the two directions of observation is 1^(@)30' . Given the diameter of the Earth to be about 1.276xx10^(7)m , computer the distance of the moon from the Earth.

The moon is observed from two diametrically opposite points A and B on Earth. The angle theta subtended at the moon by the two directions of observation is 1^(@)54' . Given the diameter of the Earth to be about 1.276xx10^(7) , compute the distance of the moon from the Earth.

A heavenly body is observed from two diametrically opposite points A and B on the earth. The angle substended at the heavenly body is 2.9 xx 10^(-4) rad. Given the diameter of Earth to be about 1.28 xx 10^(7) Compute the distance of the heavenly body from the earth.

The principle of 'parallax' in section 2.3.1 is used in the determination of distances of very distant starts. The baseline AB is the line joining the Earth's two locations six months apart in its orbit around the Sun. That is, the baseline is about the diameter of the Earth's orbit = 3xx10^(11)m . However, even the nearest stars are so distant that with such a long baseline, they show parallax only of the order of 1" (second) of arc or so. A parsec is a conventent unit of length on the astronomical scale. It is the distance of an object that will show a parallax of 1" (second of arc) from opposite ends of a baseline equal to the distance from the Earth to the Sun. How much is a parsec in terms of metres ?

The Sun's angular diameter is 30''. The distance of Earth from Sun is 1.496xx10^(11) m , then find the diameter of the Sun. (1''= 4.85xx10^(-6) rad)

When a particle is undergoing motion, the diplacement of the particle has a magnitude that is equal to or smaller than the total distance travelled by the particle. In many cases the displacement of the particle may actually be zero, while the distance travelled by it is non-zero. Both these quantities, however depend on the frame of reference in which motion of the particle is being observed. Consider a particle which is projected in the earth's gravitational field, close to its surface, with a speed of 100sqrt(2) m//s , at an angle of 45^(@) with the horizontal in the eastward direction. Ignore air resistance and assume that the acceleration due to gravity is 10 m//s^(2) . Consider an observer in frame D (of the previous question), who observes a body of mass 10 kg acelerating in the upward direction at 30 m//s^(2) (w.r.t. himself). The net force acting on this body, as observed from the ground is :-

When a particle is undergoing motion, the diplacement of the particle has a magnitude that is equal to or smaller than the total distance travelled by the particle. In many cases the displacement of the particle may actually be zero, while the distance travelled by it is non-zero. Both these quantities, however depend on the frame of reference in which motion of the particle is being observed. Consider a particle which is projected in the earth's gravitational field, close to its surface, with a speed of 100sqrt(2) m//s , at an angle of 45^(@) with the horizontal in the eastward direction. Ignore air resistance and assume that the acceleration due to gravity is 10 m//s^(2) . The motion of the particle is observed in two different frames: one in the ground frame (A) and another frame (B), in which the horizontal component of the displacement is always zero. Two observers locates in these frames ill agree on :-

Two bodies were thrown simultaneously from the same point, one straight up, and the other at an angle of theta = 30^@ to the horizontal. The initial velocity of each body is 20 ms^(-1) . Neglecting air resistance, the distance between the bodies at t = 1.2 later is

A and B are two points on uniform metal ring whose centre is O The angle AOB =theta . A and B are maintaind at two different constant temperatures When theta =180^(@) the rate of total heat flow from A to B is 1.2W When theta =90^(@) this rate will be .

On a long horizontally moving belt (From figure) a child runs to and fro with a speed 9 kmh^(-1) (with respect to the belt) between his father and mother located 50 m apart on the moving belt. The belt moves with a speed of 4 kmh-l. For an observer on a stationary platform outside, what is the (a) Speed of the child running in the direction of motion of the belt ? (b) Speed of the child running opposite to the direction of motion of the belt ? (c) Time taken by the child in (a) and (b) ? Which of the answers alter if motion is viewed by one of the parents ?

KUMAR PRAKASHAN-UNITS AND MEASUREMENT-SECTION -B (NUMERICALS) (QUESTIONS)
  1. A man wishes to estimate the distance of a nearby tower from him. He s...

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  2. The planet is observed from two diametrically opposite points A and B ...

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  3. The planet is observed from two diametrically opposite points A and B ...

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  4. The Sun's angular diameter is 30''. The distance of Earth from Sun is ...

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  5. The Jupitar's angular diameter is 35.72'' . The distance of Earth from...

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  6. The Sun's angular diameter is measured to be 1920". The distance D of ...

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  7. Two clocks are being tested against a standard clock located in a nati...

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  8. In Ohm's experiment to experiment to measure resistance different obse...

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  9. If refractive measure of water are 1.32,1.33,1.34, 1.35 and 1.36 then...

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  10. In Ohm's law potential difference between two end of a resistor are 15...

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  11. The mass of empty beaker (50.3+-0.2) g and mass of hall water breaker ...

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  12. If theta(1)=(25.5+-0.1)^(@)C and theta(2)=(35.3+-0.1)^(C), then find t...

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  13. When current density of (2.5+-0.5)A is passed from wire, then there is...

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  14. Find the absolute error in the parallel combination of R(1) and R(2)

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  15. Two resistors R(1)=(100+-3) Omega and R(2)=(150+-4.5) Omega , then how...

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  16. In K=(p^(2))/(2m) find the relative error. (Take mass m, constant)

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  17. A physical quantity P is given by P=(A^(3)B^((1)/(2)))/(C^(-4)D^((3)/(...

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  18. In an experiment four quantities a,b,c and d are measured with percent...

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  19. The periodic time of simple pendulum is T=2pi sqrt((l)/(g)). The lengt...

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  20. The period of oscillation of a simple pendulum is given by T=2pi sqrt(...

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