How can I remove a scratch from my face shield?
Try and think it through. The engineers have a problem to solve. How to get the pictures of the first man. Oh, and the first step film is not looking up. So you need to remotely activate the camera, easy. All Mr Armstrong has to do is deploy the camera. pulls a cord. The camera moves to its location and Mr Aldrin turns it on from inside the cabin. Many people every day use a camera that is held in place and operate it on their own, youtube users for example. Being on the moon does not mean the same cannot happen there.
The Fire Department is usually dispatched through your local 911 center, meaning someone has to dial 911 and speak to the dispatcher and report the nature of the emergency. If you have a home security system, such as ADT, there is a feature available that will automatically dispatch emergency services if your smoke alarm (that is wired into the security system) goes off.
Because faulty valves allow the CO2 to escape. If they weigh the same as the last time weighed, then none has escaped. A partially full canister may not have enough pressure to put out any CO2 at all. You can't throw an empty canister at the fire.
