What is the pressure drop due to the Bernoulli effect as water goes into a 3cm diameter nozzle from a 9 cm diameter fire hose while carrying a flow of 5x10^-4m^3/s?
In Control Panel, open the Printers and Faxes folder. Right-click the icon for the printer to which you want to restrict access, and click Properties. To remove extraneous group members, on the Security tab, remove all entries in the Groups or user names list box except Administrator and Creator Owner. To grant access to the printer, click Add, and then enter the names of the groups and users that you want to grant access to this printer.
Yes, but the problem lots of times is the fact that people don't TEST their smoke detectors and replace batteries when they are needed. A group of volunteers could go and remind people to test there detectors and if they don't have one, they can provide one for the home owner. Most new construction have hardwired detectors, so this mainly goes for older areas. Fire safety classes in schools and churches is another way to educate people about the dangers of failing to take simple steps to protect themselves. Unfortunately, with fire, everyone seems to take the view of It won't happen to me.