Ablock of wood has a volume of 55 cm3 and a mass of 550 g. what would be its density? answer in units of g/cm3.

The boiling point of liquids is very high what does it indicate

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?