210Pb has a half-life of 22.3 years and decays to produce 206Hg. If you start with 10.0 g of 210Pb, how many grams of 206Hg will you have after 80.8 years

Calculate the frequency of a wave in a spring toy. the wave has a speed of 1.1 meters per second and a wavelength of 0.1 meters. *

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.

The independent variable in an experiment will be the variable that you o a) change ob) hold constant ng c) observe for changes