Complications of cholecystitis and/or biliary colic may also include cholangitis, sepsis, pancreatitis, hepatitis, and choledocholithiasis (10%). In addition, Gallbladder perforation occurs in 10% of patients with cholecystitis. When perforation is localized, it may be seen as pericholecystic fluid by ultrasonography.
Half-life is defined as the time it takes for one half of a radioactive element to decay into a daughter isotope. As radioactive isotopes of elements decay, they lose their radio activity and become a brand new element known as a daughter isotope.
Instructions. Find the expression for the half-life t(half) of a radioactive sample. It is the time it takes for half of the amount of the nuclei in a sample to decay.The half-life is related to the decay constant lambda, which has a value dependent on the sample's material.The formula is t(half) = ln 2 / lambda = 0.693 / lambda.nother unit is the curie, which is equal to 3.7 x 10 exp (10) Bq. Practice calculating the radioactive decay. Radium-226 has a half-life of 1,600 years. Calculate the activity of a one gram sample, where N = 2.66 x 10 exp(21). To do this, first find lambda. Simultaneously, convert the half-life from years to seconds.