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What is elongation ?...

What is elongation ?

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When a planet and the earth revolves around the Sun, angle made by line joining the Sun and the Earth with line joining the planet and the Earth is called elongation.
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The original length of wire is (153.7 pm 0.6) cm . It is streched to (155.3 pm 0.2) cm. Calculate the elongation in the wire with error limits.

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A mass of 15 kg is tied at the end of a steel wire of the length lm. It is whirled in a vertical plane with angular velocity 1 rad/s. Cross sectional area of the wire is 0.06 cm^(2). Calculate the elongation of the wire when the mass is at its lowest position. Y_("steel”) = 2 xx 10 ^(11) Nm ^(-2)

A 14.5 kg mass, fastened to the end of a steel wire of unstretched length 1.0 m, is whirled in a vertical circle with an angular velocity of 2 rev/s at the bottom of the circle. The crosssectional area of the wire is 0.065 cm. Calculate the elongation of the wire when the mass is at the lowest point of its path. [Y_("Steel") =2 xx 10 ^(11) N,m ^(-2)]

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KUMAR PRAKASHAN-UNITS AND MEASUREMENT-SECTION -C (OBJECTIVE QUESTIONS (VSQS)
  1. Explain supplementary quantities and their unit of SI system.

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  2. Which are inferior planets ?

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  3. What is elongation ?

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  4. In modern times which method is used to measure the distance between t...

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  5. "Fundamental unit of length is kilometer and fundamental unit of mass ...

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  6. x=a+bt+ct^(2)=x in metre and tis in sec then write unit of a, b, c.

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  7. Light year is unit of …... .

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  8. A physical quantity has unit ("Watt")/(m^(2)) write its dimension.

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  9. y=x^(2)r+M^(1)L^(1)T^(-2) is dimensionally correct. If r represent dis...

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  10. Pressure P = FK where F is force, obtain dimension of K.

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  11. Obtain dimension of rho gv where, rho = density, g = acceleration, v...

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  12. Explain supplementary quantities and their unit of SI system.

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  13. The mass of an object is (225 +- 0.05) gm calculate percentage error i...

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

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  15. Subtract according to significant digit. 3.9xx10^(5)-2.5xx10^(4)

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  16. Why 10^(6) km cannot be represented by Mkm?

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  17. Volume and total surface area of a cube is equal. Find volume of cube....

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  18. Write no. of significant digit in (3204.80)xx10^(5)

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  19. Which number is obtained by rounding off 96378 upto 2 significant digi...

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  20. Explain "By changing unit zero are added. This will not change number ...

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