Problem: If we take a typical cloud-to-ground lightning stroke to represent a current of 30kA over an interval of 150 micro seconds, calculate a) instantaneous power delivered to a copper rod having resistance 1.2 milli ohms during stroke and b) total energy delivered to rod
Parental Controls can block access to certain applications, web sites, contacts for email and chat applications and can set time limits for using the computer and/or accessing the Internet. It does not monitor a users usage of the computer but that can be done elsewhere if necessary.
if it chirps every minute or so, the detector is telling you the battery is almost dead. It probably used the last of its power when it was going off. Replace the battery and it will stop.