The Castle Bravo test, with a yield of 15 megatons, is the most powerful nuclear weapon tested by the United States, but not the most powerful ever. That distinction belongs to the device known as âbig Ivanâ detonated by the Soviet Union 13,000 ft (4,000 m) above a test field on Novaya Zemlya island on October 30 1961.
An electroencephalogram (EEG) is a test that detects electrical activity in your brain using small, flat metal discs (electrodes) attached to your scalp. Your brain cells communicate via electrical impulses and are active all the time, even when you're asleep. This activity shows up as wavy lines on an EEG recording.
An electroencephalogram (EEG) is a test used to evaluate the electrical activity in the brain. Brain cells communicate with each other through electrical impulses. An EEG can be used to help detect potential problems associated with this activity. The test tracks and records brain wave patterns.