So some rocks are radioactive because they have radioisotopes in their nuclei. Also they may have radon gas trapped in their crystals if they are igneous rock. They could also be radioactive due to the fact that the atom of the rock is unstable.
Connecting USB Devices Manually. Choose VM > Removable Devices to connect specific USB devices to your virtual machine. You can connect up to two USB devices at a time. If the physical USB devices are connected to the host computer through a hub, the virtual machine sees only the USB devices, not the hub.
You can do this by using the Time Machine feature in Mac OS X, or third-party software such as Carbon Copy Cloner. 3) Create a bootable USB flash drive with a storage size of at least 8GB. 4) Download OS X 10.10 Yosemite Final from the Mac App Store and save it to the Applications folder â its default location.How to Create Bootable USB Flash Drive. First, create bootable USB flash drive. Here is how you do it: Plug in your USB drive into the computer and open Disk Utility (in Applications).1  Select the USB drive from the left sidebar and click on Erase tab. 2  Choose Mac OS Extended (Journaled) in the format box and let the name be Untitled (default).ou can do this by using the Time Machine feature in Mac OS X, or third-party software such as Carbon Copy Cloner. 3) Create a bootable USB flash drive with a storage size of at least 8GB. 4) Download OS X 10.10 Yosemite Final from the Mac App Store and save it to the Applications folder â its default location.