All states are above the Tropic of Capricorn. If you mean the Tropic of Cancer, then every state but Hawaii lies north of the Tropic.
Yes, the Tropic of Capricorn passes through South Australia. It runs through the southern part of the state, with its location varying slightly due to the Earth's axial tilt.
All of them.
The Tropic of Capricorn is in the Southern Hemisphere, so it does not pass through any US state.
No. The Tropic of Capricorn splits Queensland in half. North of this Tropic, the climate is tropical, while South of the Tropic is a sub-tropical climate tending to warm temperate in the South of the state.
The population centers in the state of Hawaii are in the tropics.
No. No point in the continental United States touches the tropic of cancer. The Tropic of Cancer is over 1,000 miles south of Washington D.C. and over 1,500 miles south of the state of Washington.
South Australia is located in the central southern part of Australia. It is the only state in Australia that touches all other mainland states. South Australia also hosts the Special Olympics in Australia.
The tropic of Cancer passes "through" only one US state: Hawaii (and in Hawaii, it actually passes considerably north of the main island group where people live and doesn't cross any land). It lies entirely south of every other state.
Yes, the sun can be directly overhead in Colorado, especially in regions near the Tropic of Cancer during the summer solstice. However, the sun is never directly overhead in the entire state of Colorado due to its location outside of the tropics.
The US state that is south of the Tropic of Cancer is Hawaii.
South Australia is the only state to border both New South Wales and Queensland. in fact, South Australia is the only state to touch all mainland states as well as the Northern Territory.