A fire hose shoots out water at a rate of 2.8kg every second and the water exits the fire hose at a velocity of 48 m/s. just for fun, a 67 kg firefighter holds the hose on a frictionless surface and fires it horizontally straight out. He is initially at rest.a.) what is the velocity of the firefighter after one second?b.) what is the velocity of the firefighter after 2 seconds?c.) what is the acceleration of the firefighter?d.) how fast is the firefighter traveling after the hose has been on for 73s?
It would depend on; a) height of bump b) slope of bump c) mass of car d) stiffness of suspension
It is obviously radioactive. Smoke detectors rely on detection of ionised gases, rather than temperature, or smokey air. Radioactivity causes ionisation of air. So you can create a standard relative to the actual.
To pick a lock you need a tension bar and a rake.The tension bar puts pressure on the pins inside the cylinder.Then you use the rake to get all the pins to the shear line.It takes a lot of practice.The more quality of a lock the harder to pick.I have used large hair pins(bobby pins) to do it but i know what i'm doing.The right pressure on the tension bar is probably to toughest part to master when you first start to learn
