A fire hose is being used to spray out a forest at Cattus Island Park. The hose is attached to the top of a fire truck located 3.5m above the ground. The water is released from the hose at a rate of 12.8 m/s at an angle of 40 degrees above the horizontal.A. what is the distance from the truck to the ground fire?B. What is the magnitude and direction of the final velocity of the water?For the first part (a) i got 8.63m but I'm not sure if it's right. And for the second part.. I don't have a clue on what to do.. Please help and Thanks! ]
Umm, Just So You Know, It's Thin, But It'll Keep You REALLY Warm.
There are already several types of devices that are made to do what you want. They have Infrared and motion detection sensors.While it sounds like a fun project, it is not feasible. Not all cameras feature a face detection or a smile detection option, and the ones that do need the shutter button depressed half way and then it will take a second or two for the camera to focus on that region. Plus, PS cameras have a port to transfer file info, you would need a camera that can do tethering and remote operation (some DSLRs). The other downfall is that since the shutter button will be partially depressed, the camera will need to be on all the time and it will be draining the battery. Since you will either need the camera hooked up to electricity or constantly recharging batteries, you will not be saving any electricity. Then consider what if someone moves away from that wall, but is still in the room?Don't forget that you will need some sort of control box that can interpret the signal from the camera and be able to turn the lights/fans on/off and that will need to be hardwired into the circuitry for that room. I won't even get into that hazards of doing that (knowing the total amps that the circuit will be powering and using components that can handle the load, fail safe in case of short circuit, etc.). Designing circuits like you want were not covered until the Bachelor Degree program in Electronic Engineering.
