1. Tardigrade
  2. Question
  3. Physics
  4. If r1 and r2 are the radii of the atomic nuclei of mass numbers 64 and 125 respectively, then the ratio ( r1/r2 ) is

Q. If r1 and r2 are the radii of the atomic nuclei of mass numbers 64 and 125 respectively, then the ratio $ \left( {{r}_{1}}/{{r}_{2}} \right) $ is

CMC MedicalCMC Medical 2009 Report Error

Solution:

$ r={{r}_{0}}{{(A)}^{1/3}} $ $ \therefore $ $ \frac{{{r}_{1}}}{{{r}_{2}}}={{\left( \frac{A{{ & }_{1}}}{{{A}_{2}}} \right)}^{1/3}} $ $ ={{\left( \frac{64}{125} \right)}^{1/3}} $ $ ={{\left[ {{\left( \frac{4}{5} \right)}^{3}} \right]}^{1/3}}=\frac{4}{5} $

Questions from CMC Medical 2009

1. Two simple harmonic motions are given by $ y=A\sin \left( \omega t+\delta \right) $ and $ y=A\sin \left( \omega t+\delta +\frac{\pi }{2} \right) $ act on a panicle simultaneously, then the motion of particle will be

2. Two sources are at a finite distance apart. They emit sound of wavelength $ \lambda $ . An observer situated between them on line joining the sources, approaches towards one source with speed u, then the number of beats heard per second by observer will be

3. A man goes at the top of a smooth inclined plane. He releases a bag to fall freely and himself slides down on inclined plane to reach the bottom. If u1, and u2 are the velocities of the man and bag respectively, then

4. Two planets A and B have the same material density. If the radius of A is twice that of B, then the ratio of escape velocity $ \frac{{{V}_{A}}}{{{V}_{B}}} $ is

5. The given figure gives electric lines of force due to two charges $ {{q}_{1}} $ and $ {{q}_{2}} $ . What are the signs of the two charges?

Physics Most Viewed Questions

1. If $E$ and $G$ respectively denote energy and gravitational constant, then $\frac{ E }{ G }$ has the dimensions of:

NEET 2021 Physical World, Units and Measurements

2. The de Broglie wavelength of an electron moving with kinetic energy of $144 \,eV$ is nearly

NEET 2020 Dual Nature of Radiation and Matter

3. A car starts from rest and accelerates at $5\, m / s ^{2}$ At $t=4\, s$, a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at $t =6\, s$ ? (Take $\left. g =10\, m / s ^{2}\right)$

NEET 2021 Motion in a Straight Line

4. A wheel with $20$ metallic spokes each $1\, m$ long is rotated with a speed of $120\, rpm$ in a plane perpendicular to a magnetic field of $0.4\, G$. The induced emf between the axle and rim of the wheel will be, $(1 G = 10^{-4}\, T)$

NEET 2020 Electromagnetic Induction

5. A barometer is constructed using a liquid (density $= 760 \,kg/m^{3})$ What would be the height of the liquid column, when a mercury barometer reads $76\, cm$ ?
(density of mercury $= 13600 kg/m^{3})$

NEET 2020 Mechanical Properties of Fluids

Latest Updates