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Class 9Class 10First YearSecond Year
$10. A measuring cylinder (fig 1.31) is filled with 500 \mathrm{cc} water. A stone of mass 20 \mathrm{~g} is immersed in to the cylinder such that water level rises up to 800 \mathrm{cc} . Which statement is correct?a) The difference between the readings gives the density of stone.b) The difference between the readings gives volume of the stonec) The final reading gives the density of stoned) The final reading gives the volume of stone$

$1.6 What role SI units have played in the development of science?$

$iii. Amount of a substance in terms of numbers is measured in:(a) gram(b) kilogramme(c) newton(d) mole$

$5. A chips wrapper is 4.5 \mathrm{~cm} long and 5.9 \mathrm{~cm} wide. Its area upto significant figures will bea) 30 \mathrm{~cm}^{2} b) 28 \mathrm{~cm}^{2} c) 26.55 \mathrm{~cm}^{2} d) 32 \mathrm{~cm}^{2}$

$1.6 On closing the jaws of a Vernier Callipers zero of the vernier scale is on the right to its main scale such that 4th division of its vernier scale coincides with one of the main scale division. Find its zero error and zero correction.$

$ii. Which one of the following unit is not a derived unit?(a) pascal(b) kilogramme(c) newton (d) watt$

$1.11 Why do we need to measure extremely small interval of times?$