Why does paraffin wax sink in alcohol?

Which of the following is true about the weight of an object? A. It remains same for the object. B. It cannot be measured accurately. C. It is a force acting on the object. D. It is always less than the mass of the object.

Which type of property of matter can be observed without changing the composition of the substance?

Blue light waves have more energy than red light waves. Which of these situations most likely produces a photoelectric effect? You may assume that the same metal is used in each situation. Check all that apply.

What are the four types of chemical reactions

What are the main classifications or categories of elements in the periodic table?

Which type of cell is a rose thorn? prokaryotic eukaryotic plant eukaryotic animal chloroplastic

Which planet has the presence of liquid water, a period of rotation equal to 24 hours, and a solid inner core

At STP, an element that is a brittle solid and a poor conductor of heat and electricity could have an atomic number of (1) 12 (3) 16 (2) 13 (4) 17

Which of the following does not indicate a chemical change? precipitate formation crushing a solid into a powder color change gas evolution

When you heat water, more sugar can be dissolved in it.