Mechanical Properties of Fluids — Physics STD 11 Science — Question

A screw gauge has a pitch of 1.0mm and 200 division on the circular scale. Is is possible to increase the accuracy of the screw gauge by increasing the number of divisions on the circular scale?

Add 4.8 x 10^-8 to 5.2 x 10^-7 on the basis of significant figures.

The first law of thermodynamics gives knowledge of the direction in which an action occurs. Is the above statement true or false?

How many unit systems are there?

Is it possible that even after heating a body, its temperature does not increase? Does this go against the first law of thermodynamics?

It it possible that work can be done by a force even when there is no motion?

A monkey climbs up a slippery pole for 3 seconds and subsequently slips for 3 seconds. Its velocity at time t is given by v(t) = 2t(3 - t); 0 < t < 3 and v(t) = -(t - 3)(6 - t) for 3 < t < 6s in m/s. It repeats this cycle till it reaches the height of 20m.
At what time is its acceleration maximum in magnitude?

If a capillary tube of insufficient length is dipped into a liquid, what will happen to the liquid rising?

What is the reason for absence of atmosphere in some planets?

Why the temperature above 1200°C cannot be measured accurately by a platinum resistance thermometer?