Nature of Physical Laws

Which one of the following statements about the law of conservation of mass is correct?

Which one of the following forces is the strongest fundamental force in nature? 

Radioactive decay exists due to :

In a nucleus with too many protons or too many neutrons, one of the protons or neutrons is transformed into the other. This phenomenon is called as : 

A ball of mass 5kg moving at 3m/s collides with another ball of mass 3kg moving at 5m/s in the same direction. If the balls move together after the collision in the same direction, find their common velocity.

The factors affecting the value of acceleration due to gravity are

The force with effectively infinite range is:

The field particle of the nuclear forces are:

In a particle accelerator, a current of $500 \mathrm{\mu A}$ is carried by a proton beam in which each proton has a speed of $3\times {10}^7 \mathrm{m}/\mathrm{s}$. The cross-sectional area of the beam is $1.50 {\mathrm{mm}}^2.$ The charge density in this beam$\left.(\text{in} \mathrm{C}/{\mathrm{m}}^3\right)$ is close to
 

The weakest fundamental force in nature is:

Friction is due to:

Two macroscopic bodies $A$ and $B$ are kept at some distance in the air.  $A$ is positively charged and $B$ is electrically neutral. $B$ will experience:

Which one of the following forces is the strongest fundamental force in nature? 

Which one of the following forces is the strongest fundamental force in nature? 

Two macroscopic bodies $A$ and $B$ are kept at some distance in the air.  $A$ is positively charged and $B$ is electrically neutral. $B$ will definitely experience:

The weakest fundamental force in nature is:

A train is moving slowly at $2 \mathrm{m}/\mathrm{s}$ next to a railway platform. A man, $1.5 \mathrm{m}$ tall, alights from the train such that his feet are fixed on the ground. Taking him to be a rigid body, the instantaneous angular velocity (in $\mathrm{rad}/\mathrm{s}$) is

In a particle accelerator, a current of $500 \mu A$ is carried by a proton beam in which each proton has a speed of $3\times {10}^7 m/s$. The cross-sectional area of the beam is $1.50 m{m}^2.$ The charge density in this beam (in $\left.C/m^3\right)$ is close to
 

Among the following, the weakest force is:

A uniform smooth rod of mass $m$ and its length is $l$) placed on a smooth horizontal surface. A particle (mass $m$) moving on the floor hit it at a distance $\frac{l}{4}$ from one end elastically ($e=1$). What is the distance covered by the centre of the rod after the collision when it has completed three revolutions ?