how much silver is in a kennedy half dollar 1971

[McGia]

Based on the information provided, a Kennedy half dollar from 1971 contains no silver.

The silver content in a Kennedy half dollar is dependent on the year it was minted. According to the provided context, earlier issues of the coin contained either 90% or 40% silver. For example, the 1964 Kennedy half dollar was composed of 90% silver. However, the source also specifies that "most modern Kennedy halves contain no silver."

The year 1971 falls into this modern, non-silver category. Kennedy half dollars minted for general circulation from 1971 onward are made of a copper-nickel clad composition and do not have any silver content. Their value is typically based on their face value, unless they are in uncirculated condition or are a rare proof variety.