Final answer:
Nonexcludable goods are ones that provide benefits that cannot be restricted to only paying customers. A radio broadcast is an example of a nonexcludable good because once it is aired, it is difficult to prevent anyone from tuning in. Police protection is also nonexcludable because it generally covers all residents in a protected area without the ability to exclude individuals.
Step-by-step explanation:
In the context of economics and public goods, goods or services that are nonexcludable are those from which individuals cannot be easily excluded from using, and thus are available to everyone. For example, once a radio signal is broadcast, it is nonexcludable because it would be very difficult to prevent someone from receiving it.
Similarly, police protection is a nonexcludable service because once it is in place, it protects all individuals within a community, and it's not feasible to exclude someone from this protection. On the other hand, something like satellite TV or cell phone service, which are typically provided by private companies for a fee, are excludable because access can be denied if the subscription fee is not paid.