A fire hose sends 50kg water each second against a building .the water speed is 60m/s and the water does not bounce back the from the wallcalculate1. the change in momentum of water.2. the net impulsive force of the water on the building.3. state with reasons whether or not the collision is elastic.showing all working will help!!!..
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Sounds like your alarm only needs cleaning. If you can remove the cover and take a brush on your vacum, give it a gentle going over a few times. As for the light , having to wait, Sounds to me that the switch is overheating. ( not good ) must replace this switch.. Hope i helped. Good Luck.
