NaCl+CaS=Na^2S+CaCl^2 balance

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.