Dr. S K Jain and Dr. Shailesh K Jain Solutions for Chapter: Model Questions for Year-End Examination, Exercise 1: Model Questions for Year-End Examination

The movement of a body is shown in the figure given below. What is the distance travelled and displacement of the body? (Assume, $A=$ initial position of the body and $D=$ final position of the body).

The figure given below is the distance-time graph of an object. Is it a real situation? If so, give a reason.

A light spring is suspended from a hook in the roof to which is attached a $200 \mathrm{g}$ weight at its lower end. The weight is pulled down and then released. The disturbance produced in the spring is:

Metallic tubes are used in the verification of the laws of reflection of sound. These tubes are highly polished from inside because they make the sound waves to: 

A student performs an experiment for the verification of laws of reflection of sound and draws a plot between the angle of incidence and the angle of reflection. The plot is likely to be a:

Using a spring balance, a given solid is weighed in the air. It is then weighed by immersing fully in water in each of three vessels containing water as shown in the following figures A, B and C.

The apparent weight of solid will be:

A vessel contains an oil (density $=0.8 \mathrm{g} {\mathrm{cm}}^{-3}$) over mercury (density $=13.6 \mathrm{g} {\mathrm{cm}}^{-3}$). A homogeneous sphere floats with half of its volume immersed in mercury and the other half in oil. The density of the material of the sphere (in $\mathrm{g} {\mathrm{cm}}^{-3}$) is:

Two solids $A$ and$B$  float in a liquid. It is observed that $A$ floats with half its volume immersed and $B$ floats with $\frac{2}{3}$ of its volume immersed. The ratio of the densities of $A$ and $B$ is: