The value of $\frac{4.0 imes 10^{-2} imes 0.00302}{200.0}$ expressed with the correct number of significant figures is:

How many significant figures are there in 40500?

Two full turns of the circular scale of a screw gauge cover a distance of 1 mm on its main scale. The total number of divisions on the circular scale is 50. Further, it is found that the screw gauge has a zero error of -0.03 mm. While measuring the diameter of a thin wire, a student notes the main scale reading of 3 mm and the number of circular scale divisions in line with the main scale as 35. The diameter of the wire is

Which of the following measurement is most precise?

The density of a substance is measured as $1.234 imes 10^2$ kg/m$^3$ using instruments with precisions of 2% and 5% for mass and volume respectively. What is the correct representation of the density including error?

A student measures the length of a rod as 25.00 cm using a vernier caliper with a least count of 0.01 cm. The student then uses a meter scale with a least count of 0.1 cm to measure the same rod. Which statement is true regarding the significant figures in these measurements?

The length of a simple pendulum is about 100 cm known to an accuracy of 1 mm. Its period of oscillation is 2s determined by measuring the time for 100 oscillations using a clock of 0.1 s resolution. What is the accuracy in the determined value of g?

A public park, in the form of a square, has an area of $\left( {100 \pm 0.2} \right){{\rm{m}}^2}$ . The side of park is

The area of a rectangular garden, whose length is 55.3 m and breadth is 25 m, is to be calculated. Rounding off the value to the correct significant figures, the area is:

A resistor of 10 k$\Omega$ having tolerance 10% is connected in series with another resistor of 20k$\Omega$ having tolerance 20%. The tolerance of the combination will be approximately

Which of the following measurement is most precise?