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.
We can install Ubuntu in a separate partition on the thumb drive, and itâs really simple, even inside Ubuntu. All you need is a USB thumb drive (preferably larger than 2GB), and a copy of Ubuntu. You can have Ubuntu running from a LiveCD, or from your hard drive. But the best way to do this is in a Virtual Machine.