Find the weight of a 30 kg object on the Moon where the acceleration of gravity is 1.622 m/s ^ 2 (Round to the nearest whole number)

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

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.

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?