Tag: measurements and experimentation

To measure long distances which of the following method is used?

$1$ ounce = ________ grams

 _______________displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.

A uniform metre scale is balanced at $40\ cm$ mark, when weighs of $25\ gf$ and $10\ gf$ are suspended at $5\ cm$ mark and $75\ cm$ mark respectively. Calculate weight of metre scale.(in gf)

Which of the following is a non-metric unit of mass ?

$AB$ is a metre scale, with forces action as shown. Its mass of $100\ g$. Calculate the algebraic sum of their moments about A. answer should be in $gf$ cm

The mass of a body is a measure of its.

Which of the following is a non-metric unit of mass ?

The period of oscillation of a simple pendulum is Given by $ T=2\pi \sqrt { \frac { \ell  }{ g }  }$  where  $\ell$ is about 100 cm and is known to have 1 mm accuracy. The period is about 2 s. The time of 100 oscillation is measured by a stop watch of least count 0.1 s. The percentage error in g is:-

In an experimental set up, the density of a small sphere is to be determined. The diameter of the small sphere is measured with the help of a screw gauge, whose pitch is 0.5 mm and there are 50 divisions on the circular scale reading on the main scale is 2.5 mm and that on the circular scale is 20 divisions. If the measured mass of the sphere has a relative error of 2%, the relative percentage error in the density is