Units and Measu...

A particle of mass $$m$$ collides with a stationary particle and continues to move at an angle of $${45}^{o}$$ with respect to the original direction. The second particle also recoils at an angle of $${45}^{o}$$ to this direction. The mass of the second particle is (collision is elastic)

Two resistors of resistances $$R_1= 150\pm2 \space \Omega$$ and $$R_2 = 220\pm6 \space \Omega$$ areconnected in parallel combination.Calculate the equivalent resistance.

Two particles X and Y having equal charges, after being accelerated through the same potential difference, enter a region of uniform magnetic field and describe circular paths of radii $$R_1$$ and $$R_2$$ respectively. The ratio of the mass of X to that of Y is?

A body is dropped from a height h. If it acquired a momentum p, Then the mass of the body is 

A body of mass $$m_1$$, moving with a uniform velocity of 50$$m{s^{ - 1}}$$ collides with another body of mass $$m_2$$ at rest and then two together start moving with a velocity 40$$m{s^{ - 1}}$$ . The ratio of their masses $$\left( {\frac{{{m_1}}}{{{m_2}}}} \right)$$ is 

Two particle X and Y having equal charges, after being accelerated through the same potential difference, enter a region of uniform magnetic field and describe circular paths of radii $$R_1$$ and $$R_2$$ respectively. The ratio of the mass X to the Y is:

Which of the following quantity is dimension less?

van der Waal's constant $$'a'$$ has the dimensions of 

Two isotopes of an element $$X$$ are present in the ratio of $$1:2$$, having mass number $$M$$ and ($$M+0.5$$) respectively. Find the mean mass number of $$X$$