Apysical combination of two or more substances that can seperated by physical means

A Heterogeneous mixture is a mixture of two or more chemical substances, where the different components can be visually distinguished and easily separated by physical means. Examples like mixtures of sand and water. Hope this helps :P

a boiling water reactor does not boil the water. a pressurized water reactor boils the water faster. a pressurized water reactor is heated directly by the core. a pressurized water reactor does not use fission.

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl