Subject: Physics, asked on 1/5/18

## Q.28. Two radioactive substances A and B initially contain equal number of nuclei. A has half life of hour and B has a half life of 3 hour. After 6 hour, the ratio of activity of A to that of B is (1) $\frac{3}{16}$ (2) $\frac{13}{15}$ (3) $\frac{7}{15}$ (4) $\frac{5}{13}$

Subject: Physics, asked on 18/4/18

## Solve qus no. 5: 5. An alpha particle having kinetic energy of 10 MeV is moving towards a stationary nucleus of atomic number 50. The distance of closest approach will be. (a) 1.44 x 10-15 m          (b) 1.44 x 10-15 m (c) 1.44 x 10-13 m           (d)  14.4 x 10-16 m

Subject: Physics, asked on 14/4/18

## Solve qus no. 27

Subject: Physics, asked on 31/3/18

## ans plss Q.15. An ideal gas with adiabatic constant 5/3 is heated at constant pressure till its volume becomes double. Then the same gas is heated at constant volume till its pressure is doubled. The average value of C (molar heat capacity) for the complete process is A) $\frac{9}{2}$ R B) $\frac{13}{6}$ R C) 3 R D) $\frac{11}{6}$ R

Subject: Physics, asked on 23/3/18

## Solve this. Q.  The time it will take a certain radioactive material with a half-life of 50 days to reduce to 1/32 of its original number is

Subject: Physics, asked on 16/3/18

## No links please Q). Prove that sensitivity of a Galvanometer is maximum when deflection is 45$°$.

Subject: Physics, asked on 5/3/18

## 200 mg of a radioactive sample reduces to 180 mg in 1000 days calculate the decay constant and half Life

Subject: Physics, asked on 5/3/18

## A 1000 MW fission reactor consumes half of its fuel in 500 y. How much ${}_{92}{}^{235}\mathrm{u}$ did it contain initially? Assume the reactor operates 80% of the time, that all the energy generated arises from the fission of ${}_{92}{}^{235}\mathrm{u}$ and  that this nuclide is consumed only by the fission process.

Subject: Physics, asked on 5/3/18

## Please can you answer this Q73. Complete the following nuclear reactions              (i) .................             (ii) ................

Subject: Physics, asked on 5/3/18

## 24) The half life of a radioactive element is 2 hr. and that of the other is 4 hr. Their initial activities are equal. After 4 hrs what will be the ratio of their activities?

Subject: Physics, asked on 2/3/18

## Write the equations for the two types of B-decau .Why is it veey difficult to detect the neutrino ?

Subject: Physics, asked on 2/3/18

## how to find the mass defect of 0xeygen

Subject: Physics, asked on 1/3/18

## How much uranium ${}_{92}{}^{235}\mathrm{U}$ should be consumed in a nuclear reactor for giving power of 106 watt, if the energy released per fission is 200 MeV?

Subject: Physics, asked on 1/3/18

## One MeV positron encounters 1 MeV electron travelling in opposite directions. What is the wavelength of photons produced? Given rest mass energy of electron or positron = 0.512 MeV and h = 6.62 × 10–34 Js.

Subject: Physics, asked on 28/2/18

## While solving numericals how do we whether a radioactive decay is spontaneous or not?

What are you looking for?