Standard California Smog Fee of $8.25 plus the dealer may not charge more than an additional $50. <br /><br /> From www.bar.ca.gov on 2/9/2010: <br /><b>How much does a Smog Check cost?</b><br /> Smog Check prices vary in different areas. Prices for Smog Checks are not regulated, so you are encouraged to shop around. For a list of stations in your area, visit the search page or call (800)952-5210. Standard California Smog Fee of $8.25 plus the dealer may not charge more than an additional $50. From www.bar.ca.gov on 2/9/2010: How much does a Smog Check cost? Smog Check prices vary in different areas.
The answer to the second question is no. No one can tell when a particular atom of a radioactive substance will decay. However, when we are dealing with large numbers of radioactive atoms we can predict how long it will take for a certain number or percentage of the atoms to decay. For each radioactive isotope, we can predict a certain half-life.
A knowledge of radioactive half-life is important because. It enables the dating of artifacts. It allows us to calculate how long we must store radioactive waste until they become safe. It enables doctors to use safe radioactive tracers. Half-life is the time it takes for one-half of the atoms of a radioactive material to disintegrate. Scientists can use the half-life of carbon-14 to determine the approximate age of organic objects. They determine how much of the carbon-14 has transformed. They can then calculate the age of a substance.