Recent content by Magda|A380

Could anyone help with the above question? My exam is in less than a week... Thanks :)

How would I go about finding the no. of nuclei decaying in time, t? I was thinking of using N = N0e-λt; but which values should I use for N0 and N? I worked out, using Avogadro's constant, that 0.2g of radium-226 has 5.3x1020 nuclei. The question says that 80% of the energy of the...

Homework Statement 0.2g of a radium salt was separated from a ton of uranium ore. The radioactive radium nuclide Ra-226 decays by alpha-particle emission with a half-life of 1600 years. 1 year = 3.16x107s. The curie is defined as the number of disintegrations per second from 1.0g of Ra...

Thanks collinsmark :) Yeah, my books is known to be wrong sometimes and 1.84 x 10-14 m still lies within the gamma ray wavelength range; so I'll accept it as the correct answer.

Homework Statement The pion-zero meson has its mass quoted as 135.0MeV/c2. It decays into two gamma rays: ∏0 → γ + γ b) Assuming the ∏0meson to be initially at rest, calculate the energy and hence the wavelength of the two gamma rays. Homework Equations E= hc/λ The Attempt at a...