ron-59 is a beta emitter with a half-life of 44.5 days. If a sample initially contains 144 mg of iron-59, how much iron-59 is left in the sample after 213 days?

5.22 mg

Explanation:

Half life is the amount of time taken for a substance to reduce to half of its initial value. The half life is calculated using:

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.