Is cutting a sheet of paper in half a physical or chemical change

What is the speed of electromagnetic waves in a vacuum

Determine the number of atoms in 1.85 ml of mercury. (the density of mercury is 13.5 g/ml.)

What is DHMO? Hint: You find it everywhere something is wet ...

sample of an ideal gas at 1.00 atm and a volume of 1.09 L was placed in a weighted balloon and dropped into the ocean. As the sample descended, the water pressure compressed the balloon and reduced its volume. When the pressure had increased to 45.

What will most likely occur if sulfur forms an ionic bond with another element? Sulfur will accept electrons. Sulfur will donate electrons. Sulfur will become a positive ion. Sulfur will become less stable.

Which one doesnt belong in the list below? A. a meter B. one liter C. One centimeter D. one kilometer

Which elements did curies discover

When rubidium metal is exposed to air, two atoms of rubidium, Rb, combine with one atom of oxygen. If 1.98 grams of rubidium is exposed to air, what will be the mass of the product in grams

Fission reactions can get of of control without what taking place?

In which main energy level does the 's' sublevel first appear? K (first main energy level) L (second main energy level) M (third main energy level) N (fourth main energy level)