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

Which of the following describes nuclear fission? A. An electron is ejected when a neutron becomes a proton. B. A high-energy gamma ray is released from a nucleus. C. A parent element splits into two daughter elements. D.

Your observations should have revealed at least one difference in the properties of the sodium benzoate and the benzoic acid. what property was it and what observation revealed the difference?

What type of radiation is most likely to damage DNA?

Which statement best describes a mole? It is used mainly for writing chemical formulas. It is used for chemical equations that have reversible reactions. It is used for directly comparing the amounts of substances.

A sample of gas occupying 350 mL at 25 C is cooled to - 25 C. What volume will it occupy if the pressure is held constant?

The flame from my candle gives off black smoke heat and light what type of changes do these indicate

Which one of the following processes results in a decrease in the number of neutrons? corrosion electron capture gamma emission positron emission alpha emission

Calculate the root mean square velocity of F2, Cl2, and Br2 at 304 K.

The total pressure inside a 1.62 cylinder kept at 35°C is 1.15 atm. If the volume of the cylinder drops to 0.74 L and the temperature remains the same, what is the new pressure inside the cylinder?

What is difference between tempering and aging?