x = 0.239 mg. Problem #5: Determine the age of a sample of charcoal which is giving off 25 counts per hour, if carbon-14 from a just made piece of charcoal gives off 85 counts per hour. The half life of carbon-14 is 5730 years. The solution done in a video.
A socket wrench is a type of wrench or spanner that has a socket attached at one end, usually used to turn a fastener. The most prevalent form is the ratcheting socket wrench, often called a ratchet. A ratchet is a hand tool in which a metal handle is attached to a ratcheting mechanism, which attaches to a socket, which in turn fits onto a type of bolt or nut. Pulled or pushed in one direction, the ratchet loosens or tightens the bolt or nut attached to the socket. Turned the other direction, the ratchet does not turn the socket but allows the ratchet handle to be re-positioned for another turn while staying attached to the bolt or nut.
The ratchet strap is trucking essentials, and it has a lot of varieties, the width is from 1 to 4, and the length can be as short as 1 foot to as long as 70', the working load limit can be hundreds of pounds to more than 5400 LBS, and the webbing part of the assembly is made from nylon or polyester, depends on different applications you can choose ...