The microwaves in a microwave oven are produced in a special tube called a magnetron. The electrons orbit the magnetic field at 2. 4 ghz, and as they do so they emit 2. 4 ghz electromagnetic waves.

There are main groups in the modern periodic table of elements

What are scientists who study fossils called? ( a ) astronomers. ( b ) biologists. ( c ) geologists. ( d ) paleontologists.

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering