an atom makes a transition from an excited state with a lifetime of 10^-9 s to the ground state and emits a photon with a wavelength 600 nm. What is the uncertainty in the energy of the excited state

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.