stars form from nebulae of dust and gases. depending on its properties, a star may become a red, yellow, white, or blue star. which property determines this star type?

Which atomic model was proposed as a result of j. j. thomson’s work?

Nacidified solution was electrolyzed using copper electrodes. a constant current of 1.18 a caused the anode to lose 0.584 g after 1.52 ✕ 103 s. given that the charge of an electron is 1.6022 ✕ 10−19 c, calculate avogadro's number. assume that copper is oxidized to cu2+ ions.

What kind of simple machine is a catapult?