Atomic and Nuclear Physics Answers

Can 1 kg of stone be converted in to energy according To Einstein mass energy relation?

Can a 1 kg of stone be converted in to energy According to E=mc2?

Why radiations affect humans? How they can cause a cancer?

What does Binding energy per nucleon means?

What is the amount of energy given by atom bomb?How large area it can destroy?

Can a neutron be broken in to an electron and a proton?

why neutron has no charge?

calculate how long it would take for the following to decay to an activity of 1 becquerel (Bq).
1. A sample of cobalt-60(half-life - 5.27 years) whose original activity is 64 Bq.
2.A sample of iodine-131 (half-life - 8 days) whose original activity is 128 Bq.
3. A sample of polonium -210 (half-life - 138 days) whose original activity falls is 32 Bq.

calculate the half lives of the following samples.
1. A sample of iodine-123 whose activity falls from 1000 Bq to 250 Bq in 14.4 hours.
2.A sample of technetium -99m whose activity falls from 200 Bq to 25 Bq in 18 hours.
3. A sample of strontium-90 whose activity falls 500 Bq to 62.5 Bq in 86.4 years.

To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. What kinetic energy must the electrons have in order to resolve a protein molecule that is 4.20 nm in diameter? Take the mass of an electron to be 9.11× 10–31 kg.