You are diving a car out in rural America and suddenly you get a flat tire. you pull off to the side of the road. you check your
cell reception and dont have a single bar of signal (your cell phone won't work). you look around and there is no other cars or houses anywhere in sight and you do not remember the last time you saw a passing car or house. you are absolutely alone. the sun is setting and it is just starting to get dark. you get out and jack up the car, loosen the 4 nuts, take off the wheel with the flat tire. you grab the spare from the trunk and slide it onto the axle- you then look around for the 4 nuts and they are no where to he found. you search everywhere and cant find them. its gettint cold and dark. you look at the car, what can you do? all four of the nuts from the wheel have vanished snd are just gone. explain what you can do and why? remember, you cant call anyone because there is no reception, there is no one else on the road and you havent seen anyone in hours, its getting dark and cold, the 4 nuts from the wheel are gone, the car cannot drive safely with only 3 wheels
We know that it is easier that to shield or stop an alpha particle (i.e. He nucli) as they can be stopped or obstructed by only a few centimetres of the material. However, the gamma rays ( γ ) can penetrate through the material to a greater distance. Therefore, we can choose the first one.
If we ignore the initial procurement cost of the items the operational cost of any device consuming electricity is given by
Among the three item's LED consumes the lowest power to give the same level of brightness as compared to the other 2 item's thus LED's shall have the lowest operational cost.
